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Manitowoc National Crane NBT50 Series, Operator'S Manual

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Manitowoc National Crane NBT50 Series Operator'S Manual Download Page 123

NATIONAL CRANE

Published 03-23-2018 Control # 243-14

6-1

NBT50 OPERATOR MANUAL                                           

MAINTENANCE CHECKLIST

6

SECTION 6

MAINTENANCE CHECKLIST

SECTIONS CONTENTS

Crane Inspection And Maintenance . . . . . . . . . . .  6-1

Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  6-1
Special Boom Inspection  . . . . . . . . . . . . . . . . . . .  6-3
Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  6-3

Hoist Cable Inspection And Maintenance  . . . . . .  6-3

Keeping Records  . . . . . . . . . . . . . . . . . . . . . . . . .  6-3
Environmental Conditions . . . . . . . . . . . . . . . . . . .  6-3
Dynamic Shock Loads  . . . . . . . . . . . . . . . . . . . . .  6-3
Precautions and Recommendations 

During Inspection  . . . . . . . . . . . . . . . . . . . . . . . . .  6-4
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  6-4
Wire Rope Replacement. . . . . . . . . . . . . . . . . . . .  6-5
Care of Wire Rope  . . . . . . . . . . . . . . . . . . . . . . . .  6-5

Replacement Cable. . . . . . . . . . . . . . . . . . . . . . . . .  6-5

Crane Adjustments and Repairs  . . . . . . . . . . . . . . 6-6

Boom Extension Cable  . . . . . . . . . . . . . . . . . . . . . 6-6
Jib Jack Service and Maintenance  . . . . . . . . . . . . 6-6
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Rust Prevention . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Hydraulic System  . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Oil Cooler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Tire Load And Inflation Table . . . . . . . . . . . . . . . . . 6-7
Specifications  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

Hydraulic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Air Conditioner . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Hoist System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Counterweight . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
General  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

CRANE INSPECTION AND MAINTENANCE 

Regularly scheduled inspection and maintenance intervals
are required to keep the unit in peak operating condition. The
following pages outline the inspection and maintenance
intervals.

Refer to the Service Manual for complete instructions on
performing maintenance on this crane.

Inspections

The inspection intervals listed below are to be conducted on
the unit to ensure safe and proper operation. If replacing a
missing fastener or tightening a loose fastener, refer to the
applicable torque chart in Section 1 of the Service Manual.
Should a defect be found, a determination must be made as
to whether the deficiency is a safety hazard or though not yet
a safety hazard, needs to be monitored in the monthly
inspections.

The inspections are separated into the following frequency
classifications: 

•

Daily inspections - performed by the operator at the start
of the day.

•

Weekly inspections - performed by the operator. 

•

Monthly inspections - performed by maintenance
personnel.

•

Periodic inspections - performed by maintenance
personnel at least every three months and includes all
i t e m s   l i s t e d   u n d e r   d a i l y,   w e e k l y,   a n d   m o n t h l y
inspections. Federal Laws through OSHA and ANSI
B30.5 require that dated and signed records of these
periodic inspections be kept. An inspection log book is
available from National Crane.

Daily Inspections/Pre-use

Check the following items:

1.

Engine oil level.

2.

Hydraulic oil level.

3.

Radiator coolant level.

4.

Loose parts or damage to structures or welds.

DANGER

Do not, under any circumstances, work at an elevated
height without using proper fall protection as required by
local, state or federal regulations

!

 WARNING

If any defect determined during the inspection is a safety
hazard the machine must be removed from service and
the defect corrected.

!

Summary of Contents for National Crane NBT50 Series

Page 1: ...Operator Manual National Crane NBT50 Series ...

Page 2: ......

Page 3: ...the turret Always furnish crane serial number when ordering parts or communicating service problems with your distributor or the factory 2018 Grove U S L L C An untrained operator subjects himself and others to death or serious injury Do not operate this crane unless You have been trained in the safe operation of this crane Manitowoc is not responsible for qualifying personnel You read understand ...

Page 4: ...ust system Do not idle the engine except as necessary For more information go to www P65warnings ca gov diesel Battery posts terminals and related accessories contain chemical lead and lead compounds chemicals known to the State of California to cause cancer birth defects and other reproductive harm Wash hands after handling California Spark Arrestor Operation of this equipment may create sparks t...

Page 5: ... 2 6 Wind Forces 2 6 Wind Speeds 2 7 Lifting Operations 2 20 Counterweight 2 21 Outrigger Lift Off 2 21 Multiple Crane Lifts 2 21 Tilt Up Panel Lifting 2 21 Pile Driving and Extracting 2 22 Crane Equipment 2 22 Crane Inspection 2 22 Electrocution Hazard 2 23 Set Up and Operation 2 24 Electrocution Hazard Devices 2 24 Electrical Contact 2 25 Special Operating Conditions and Equipment 2 25 Earthing ...

Page 6: ... 3 3 Engine Speed Governor 3 3 Neutral Start Safety Switch 3 3 Outrigger Controls 3 3 Crane Level Indicators 3 4 Cab Outrigger Control 3 4 Ground Station Outrigger Control 3 4 Crane Controls 3 7 Outrigger Control Box 3 9 Swing Brake Pedal 3 9 Swing Lock Pedal Optional 3 9 Swing Brake Indicator 3 9 Swing Brake Control Switch 3 9 Swing Horn Button 3 9 Boom Telescope Pedal Standard with Aux Hoist 3 9...

Page 7: ...pment Checks 3 14 Cold Weather Operation 3 15 Crane Warm up Procedures 3 15 Engine 3 15 Transmission 3 15 Hoist 3 15 Swing Drive and Turntable Bearing 3 16 Axles 3 16 Hydraulic Oil System 3 16 Anti two Block Check 3 16 RCL Check 3 16 Hoist System Operation 3 17 Work Site Location 3 17 Before Leaving the Truck Cab 3 17 Stowing and Parking 3 17 Unattended Crane 3 18 Before Making the Lift 3 18 Load ...

Page 8: ...s Grease 5 2 Low Temperature Grease 5 2 Extreme Pressure Multipurpose Gear Lubricant EPGL 5 2 Open Gear Lubricant 5 2 Low Temperature Grease 5 2 Antifreeze Coolant for Cab Heater 5 2 Anti wear Additives 5 2 Hydraulic Oil 5 2 Standard Hydraulic Oil 5 2 Arctic Hydraulic Oil 5 3 Hydraulic Oil Inspection 5 3 Lubrication Points 5 3 Internal Cable Sheave Lubrication 5 7 Side and Bottom Boom Wear Pad Lub...

Page 9: ...ght 6 11 General 6 11 SECTION 7 Rated Capacity Limiter System Description 7 2 Alert and Limit Symbols 7 3 RCL Override Warning 7 4 RCL Setup 7 6 Boom Configuration 7 6 Counterweight Configuration 7 7 Outrigger Configuration w o jib or basket 7 7 Hoist Reeving Configuration 7 9 Confirmation 7 9 Operating Mode 7 9 TARE Function 7 10 Operational Limits 7 11 Slew Angle Limit 7 11 WADS Limit 7 11 Boom ...

Page 10: ...TOC 6 TABLE OF CONTENTS OPERATOR MANUAL NBT50 THIS PAGE BLANK ...

Page 11: ...ervice can be expected Constant improvement and engineering progress makes it necessary that we reserve the right to make specification and equipment changes without notice National Crane and our Distributor Network want to ensure your satisfaction with our products and customer support Your local distributor is the best equipped and most knowledgeable to assist you for parts service and warranty ...

Page 12: ...INTRODUCTION OPERATOR MANUAL NBT50 1 2 Published 03 23 2018 Control 243 14 FIGURE 1 1 7650 66 ...

Page 13: ...n Hoist front 9b Auxiliary Hoist rear 10 Outrigger Beam 11 Outrigger Box 12 Jib 13 Turret Bearing 14 Hook Block 15 Hoist Cable 16 Ground Outrigger Control 17 Hydraulic Pump 18 Cab Outrigger Control Inside Cab 19 Cab Seat 20 Access Steps 21 Hydraulic Tank 22 Outrigger Stabilizer 23 Outrigger Float 24 Counterweight 25 Cab Joysticks Item Component 25 2 12 1 22 FIGURE 1 2 11 3 17 7 6 5 8 14 15 19 16 2...

Page 14: ...idents malfunctions and equipment damages to your local National Crane distributor Following any accident or damage to equipment the local National Crane distributor must be immediately advised of the incident and consulted on necessary inspections and repairs Should the distributor not be immediately available contact should be made directly with Manitowoc Crane Care The crane must not be returne...

Page 15: ...ice and Repairs 2 28 Lubrication 2 28 Tires 2 29 Hoist Rope 2 29 Synthetic Hoist Rope 2 29 Wire Rope 2 29 Sheaves 2 30 Batteries 2 31 Engine 2 31 Transporting the Crane 2 31 Travel Operation 2 32 Work Practices 2 33 Personal Considerations 2 33 Crane Access 2 33 Job Preparation 2 33 Working 2 33 Lifting 2 34 Hand Signals 2 35 Boom Extension 2 37 Parking and Securing 2 37 Shut Down 2 37 Cold Weathe...

Page 16: ...nitowoc distributor must be immediately advised of the incident and consulted on necessary inspections and repairs Should the distributor not be immediately available contact should be made directly with Manitowoc Product Safety at the address below The crane must not be returned to service until it is thoroughly inspected for any evidence of damage All damaged parts must be repaired or replaced a...

Page 17: ...tant instructions and warnings and must be read prior to any operational or maintenance function Refer to the Parts Manual for this crane for the locations of all safety decals You must be familiar with the regulations and standards governing cranes and their operation Work practice requirements may vary slightly between government regulations industry standards and employer policies so a thorough...

Page 18: ... measurement When an Anti Two Blocking Device Two Blocking Damage Prevention Device or Two Block Warning Device is inoperative or malfunctioning the designated person responsible for supervising the lifting operations shall establish procedures such as assigning an additional signal person to furnish equivalent protection This does not apply when lifting personnel in load line supported personnel ...

Page 19: ...in preventing this condition An Anti Two Block System is intended to assist the operator in preventing dangerous two block conditions It is not a replacement for operator awareness and competence Never interfere with the proper functioning of operational aids or warning devices Working Area Limiter If Equipped This crane may be equipped with a working area limiter as part of the RCL system designa...

Page 20: ...oad before you attempt the lift Outrigger beams and jack cylinders plus center front stabilizer if equipped must be properly extended and set to provide precise leveling of the crane Tires must be clear of the ground before lifting on outriggers KEEP THE BOOM SHORT Swinging loads with a long line can create an unstable condition and possible structural failure of the boom Load Charts Load Charts r...

Page 21: ...he 3 second wind gust speed V z may be calculated based on mean wind speed reported at http www windfinder com Super Forecast This 3 second wind gust is assumed to act on the entire crane and the load The wind effect on the load can be conservatively estimated as a If V z is 13 4 m s 30 mph then the allowable load is the published rated capacity from the Load Chart b If V z is 13 4 m s 30 mph and ...

Page 22: ...ing is NOT permitted Cease lifting operations and lower and retract the boom In both cases a and b above the lift may also be limited by the projected wind area of the load Ap and by the wind drag coefficient Cd This limit can be determined by comparing the Actual wind resistance area with the Allowable wind resistance area Refer to Figure 2 1 for a simplified calculation method to determine permi...

Page 23: ...coefficient of load Calculate Awr load Ap X Cd Determine Cd of Load Ap maximum height X maximum length See Figure 2 2 Lifting is not permitted Cease Lifting Operations V z 20 1 m s 45 mph 13 4 m s V z 20 1 m s 30 mph V z 45 mph Use Main Boom on Fully Extended Outriggers ONLY V z 13 4 m s 30 mph Main Boom Allowable load Published Rated Capacity Allowable Load Published Rated Capacity X Capacity Red...

Page 24: ...d at this condition Size and Shape of the load These rated capacities are also based on the assumption that the Wind Resistance Area of load Awr load is not more than 0 0012 square meters per kilogram 0 0059 sq ft per pound of load See below Formulas 2 4 and 2 5 The load capacities shall be reduced to account for the larger wind resistance area of load and 3 second wind gust speed at boom tip heig...

Page 25: ...pes and corresponding Wind Drag Coefficient Cd values If the exact Wind Drag Coefficient of a shape is not known use the maximum value of the shape s range Table 2 2 If the wind drag coefficient of the load cannot be estimated or determined it shall be assumed that Cd 2 4 Ap 24 m2 Ap 8 m2 Wind Wind 8 m 1 m 3 m 8 m 1 m 3 m Ap 250 ft2 Ap 75 ft2 Wind Wind 25 ft 3 ft 10 ft 25 ft 3 ft 10 ft 8384 1 FIGU...

Page 26: ...peed V z for the load using Table 2 3 Table 2 3 Awr Ratio and Permissible Wind Speed V z Non metric 8384 2 Shape Cd 1 1 to 2 0 0 3 to 0 4 0 6 to 1 0 0 8 to 1 2 0 2 to 0 3 0 05 to 0 1 Approximately 1 6 Turbine Blade or Complete Rotor Note Permissible and rated wind speeds in this table are the 3 second gust wind speeds at boom tip height Ratio 1 2 1 4 1 6 1 8 2 Maximum Permissible Wind Speed mph Fo...

Page 27: ...NATIONAL CRANE Published 03 23 2018 Control 243 14 2 13 NBT50 OPERATOR MANUAL SAFETY PRECAUTIONS 2 Rated Load Chart Example Metric FIGURE 2 3 8383 1 ...

Page 28: ...s in this table are the 3 second gust wind speeds at boom tip height Ratio 1 2 1 4 1 6 1 8 2 Maximum Permissible Wind Speed m s For Rated Capacity at 13 4 m s 12 2 11 4 10 6 10 0 9 5 For Allowable Capacity at 20 1 m s 18 3 17 0 15 9 15 0 14 2 Table 2 4 Example Capacity Reduction Factors for Wind Speed V z Greater than 13 4 m s Metric Only for lifting with main boom on fully extended outriggers wit...

Page 29: ...llow 13 08 m2 14 45 m2 YES Conclusion This load is permissible to lift in wind speed up to 20 1 m s Load example 1 3a With large wind resistance area of the load Awr load Load to be lifted of 14 000 kg Projected Wind Area Ap 21 85 m2 Wind Drag Coefficient Cd 1 2 the wind resistance area of load can be estimated as Awr load Ap X Cd 21 85 x 1 2 26 22 m2 Refer to the above Lifting Limits at wind spee...

Page 30: ... allow 19 83 m2 14 45 m2 NO Conclusion This load is NOT permissible to lift in wind speed up to 20 1 m s but permitted to lift at a reduced wind speed calculated as follows Ratio 1 37 From Table 2 5 the maximum permissible wind speed at ratio of 1 37 rounded to next higher table value of 1 4 is 17 0 m s Conclusion This load is permissible to lift in wind speed up to 17 0 m s only ...

Page 31: ...NATIONAL CRANE Published 03 23 2018 Control 243 14 2 17 NBT50 OPERATOR MANUAL SAFETY PRECAUTIONS 2 Rated Load Chart Example Non metric FIGURE 2 4 8382 1 ...

Page 32: ...resistance area of Awr allow 0 0059 x 20 160 119 ft2 Note Permissible and rated wind speeds in this table are the 3 second gust wind speeds at boom tip height Ratio 1 2 1 4 1 6 1 8 2 Maximum Permissible Wind Speed mph For Rated Capacity 30 mph 27 4 25 4 23 7 22 4 21 2 For Allowable Capacity 45 mph 41 1 38 0 35 6 33 5 31 8 Table 2 6 Example Capacity Reduction Factors for Wind Speed V z Greater than...

Page 33: ...llow 108 ft2 119 ft2 YES Conclusion This load is permissible to lift in wind speed up to 45 mph Load example 2 3a With large wind resistance area of the load Awr load Load to be lifted of 22 000 lb Projected Wind Area Ap 180 ft2 Wind Drag Coefficient Cd 1 2 the wind resistance area of load can be estimated as Awr load Ap x Cd 180 x 1 2 216 ft2 Refer to the above Lifting Limits at wind speed V z 30...

Page 34: ...ys keep the load as near to the crane and as close to the ground as possible Do not overload the crane by exceeding the capacities shown on the appropriate Load Chart Death or serious injury could result from the crane tipping over or failing structurally from overload The crane can tip over or fail structurally if The load and crane s configuration is not within the capacity as shown on the appli...

Page 35: ...autions are taken Secure the services of a qualified person to direct the operation Use one qualified signal person Coordinate lifting plans with the operators designated person and signal person prior to beginning the lift Maintain communication between all parties throughout the entire operation If possible provide approved radio equipment for voice communication between all parties engaged in t...

Page 36: ...ted to fully extended outriggers with all tires clear of the ground The combined weight of the driver or extractor piling leads attachments etc shall not exceed 80 of the published load chart values for on outriggers operation The pile driver or pile extractor and attachments shall be kept clear of the boom nose at all times The pile driver and piling shall be suspended from a hoist cable with suf...

Page 37: ...ny part of this crane its rigging or load never touch the crane or even approach or come near the crane Electrocution can occur even without direct contact with the crane Crane operation is dangerous when close to an energized electrical power source Exercise extreme caution and prudent judgement Operate slowly and cautiously when in the vicinity of power lines Before operating this crane in the v...

Page 38: ...ties while the crane is working Tag lines should always be made of non conductive materials Any tag line that is wet or dirty can conduct electricity Do not store materials under power lines or close to electrical power sources Electrocution Hazard Devices The use of insulated links insulated boom cages guards proximity warning devices or mechanical limit stops does not assure that electrical cont...

Page 39: ...epairs Thoroughly inspect the rope and all points of contact on the crane Should the distributor not be immediately available contact Manitowoc Crane Care The crane must not be returned to service until it is thoroughly inspected for any evidence of damage and all damaged parts are repaired or replaced as authorized by your Manitowoc distributor or Manitowoc Crane Care Special Operating Conditions...

Page 40: ...platform is prohibited except when the erection use and dis mantling of conventional means of reaching the worksite such as a personnel hoist ladder stair way aerial lift elevating work platform or scaffold would be more hazardous or is not possible because of structural design or worksite conditions Additional requirements for crane operations are stated in ASME B30 5 Mobile and Locomotive Cranes...

Page 41: ...to oil fuel grease coolant air conditioning refrigerant filters batteries and cloths which have come into contact with these environmentally harmful substances Handle and dispose of waste according to local state and federal environmental regulations When filling and draining crane components observe the following Do not pour waste fluids onto the ground down any drain or into any source of water ...

Page 42: ...n cause permanent eye injury Wear appropriate eye protection Moving Parts Do not place limbs near moving parts Amputation of a body part may result Turn off the engine and wait until the fan and belts stop moving before servicing crane Pinch points which result from relative motion between mechanical parts are areas of the machine that can cause personal injury or death Do not place limbs or your ...

Page 43: ...gth of rope equal to six 6 times the rope diameter or more than four 4 broken wires in a length of rope equal to thirty 30 times the rope diameter For running ropes other than rotation resistant six 6 broken wires in one rope lay or three 3 broken wires in one strand One valley break where the wire fractures between strands in a running rope is cause for removal Abrasion of the rope resulting in a...

Page 44: ...avoided Ropes are damaged by knots Rope with knots must never be used Environmental factors such as corrosive conditions and heat can damage a wire rope Lack of lubrication can significantly shorten the useful life of a wire rope Contact with electrical wires and resulting arcing will damage a wire rope An inspection should include verification that none of the specified removal criteria for this ...

Page 45: ...er test equipment Batteries shall not be charged except in an open well ventilated area that is free of flame smoking sparks and fire Engine Fuel the crane only with the engine turned off Do not smoke while fueling the crane Do not store flammable materials on the crane Be familiar with the location and use of the nearest fire extinguisher Be careful when checking the engine coolant level The flui...

Page 46: ...ake a chance of running into overhead or side obstructions When moving in tight quarters post a signal person to help guard against collisions or bumping structures Before traveling a crane check suitability of proposed route with regard to crane height width and length Never back up without the aid of a signal person to verify the area behind the crane is clear of obstructions and or personnel On...

Page 47: ...ter coolers and the like on the crane This practice will prevent ground personnel from being crushed or electrocuted when they attempt to access personal belongings stored on the crane Job Preparation Before crane use Barricade the entire area where the crane is working and keep all unnecessary personnel out of the work area Ensure that the crane is properly equipped including access steps covers ...

Page 48: ...ersonnel Operate the equipment from the operator s control station Do not reach in a window or door to operate any controls Operate the crane slowly and cautiously looking carefully in the direction of movement A good practice is to make a dry run without a load before making the first lift Become familiar with all factors peculiar to the job site Ensure the rope is properly routed on the hook blo...

Page 49: ...ugh the original setup may have been checked situations do change Never swing or lower the boom into the carrier cab if applicable Never push or pull loads with the crane s boom never drag a load Do not subject crane to side loading A side load can tip the crane or cause it to fail structurally If the boom should contact an object stop immediately and inspect the boom Remove the crane from service...

Page 50: ...2 36 Published 03 23 2018 Control 243 14 SAFETY PRECAUTIONS NBT50 OPERATOR MANUAL 8496 1 FIGURE 2 6 ...

Page 51: ...be left running with a load on the hook or in erection mode or in wind conditions in excess of allowed values The boom should be retracted as far as is practical the crane configured in as stable a configuration as possible boom angle superstructure orientation boom extension angle etc In high winds the boom and boom extensions should be lowered or secured Changing weather conditions including but...

Page 52: ...with a larger difference in oil temperature verses the ambient temperature Thermal contraction coupled with improper lubrication or improper wear pad adjustments may under certain conditions cause a stick slip condition in the boom This stick slip condition could result in the load not moving smoothly Proper boom lubrication and wear pad adjustment is important to permit the boom sections to slide...

Page 53: ...9 29 10 32 25 1 29 2 58 3 87 5 16 6 45 7 74 9 03 10 32 11 61 12 90 30 1 55 3 10 4 64 6 19 7 74 9 29 10 84 12 38 13 93 15 48 35 1 81 3 61 5 42 7 22 9 03 10 84 12 64 14 45 16 25 18 06 40 2 06 4 13 6 19 8 26 10 32 12 38 14 45 16 51 18 58 20 64 45 2 32 4 64 6 97 9 29 11 61 13 93 16 25 18 58 20 90 23 22 50 2 58 5 16 7 74 10 32 12 90 15 48 18 06 20 64 23 22 25 80 55 2 84 5 68 8 51 11 35 14 19 17 03 19 8...

Page 54: ...rload warning will be posted to the web site for review by the crane owner Overload warnings do NOT indicate real time events Warnings could be sent 24 hours or more after the actual event WARNING Overload Hazard To avoid an accident caused by overload damage to your crane Perform the inspections outlined in this publication for overloads up to 50 Stop operating the crane and contact Manitowoc Cra...

Page 55: ...CRANE Published 03 23 2018 Control 243 14 2 41 NBT50 OPERATOR MANUAL SAFETY PRECAUTIONS 2 Boom Inspection 8670 2 5 6 1 2 3 9 10 7 4 1 9 10 1 1 8 8238 1 Illustration for reference only Your crane may be different ...

Page 56: ...Rope Guides Inspect all for damage 2 Collar Wear Pads Pad Retainers Inspect all for damage 3 Collar welds Inspect all for damage 4 Pinning Areas Inspect all for cracks 5 Telescopic Sections Inspect for bent or twisted sections Check the boom for straightness 6 Lift Cylinder Head Area Inspect for bends or cracked welds 7 Turret Base Section Inspect for cracked welds 8 Jib Section Inspect for bent o...

Page 57: ...CRANE Published 03 23 2018 Control 243 14 2 43 NBT50 OPERATOR MANUAL SAFETY PRECAUTIONS 2 Superstructure Inspection 2 7 1 3 8 10 9 6 5 4 7920 1 8238 1 Illustration for reference only Your crane may be different ...

Page 58: ... from 25 to 49 1 Lift Cylinder Inspect for leaks 2 Wire Rope Inspect all for damage See topic in Introduction section of Service Manual 3 Turntable Bearing Check bolts for proper torque See topic in Swing section of Service Manual 4 Hoist Drums Inspect each for damage 5 Hoist Brakes Brakes must hold rated line pull 6 Bearing Main Boom Pivot Pin Inspect for deformation cracked welds 7 Lift Cylinder...

Page 59: ...ublished 03 23 2018 Control 243 14 2 45 NBT50 OPERATOR MANUAL SAFETY PRECAUTIONS 2 Carrier Inspection 3 1 1 2 2 2 3 3 4 4 5 6 8238 1 7 7 8283 3 Carrier Frame Illustration for reference only Your crane may be different ...

Page 60: ...inders Inspect for leaks 2 Outrigger Pads Inspect for deformation and cracked welds Overload from 25 to 49 1 Stabilizer Cylinders Inspect for leaks 2 Outrigger Pads Inspect for deformation and cracked welds 3 Outrigger Beams Inspect for deformation and cracked welds 4 Outrigger Boxes Inspect for deformation and cracked welds 5 Welds Inspect for cracks 6 Paint Inspect for cracked paint which could ...

Page 61: ...ight Switch 3 10 Skylight Wiper Switch 3 11 Windshield Wiper Washer Switch 3 11 Air Conditioning Heater Controls 3 11 Dual Axis Controller Boom Lift Main Hoist 3 11 Dual Axis Controller Swing Tele Aux Hoist 3 11 Seat Back Adjustment 3 11 Seat Controls Assembly Slide Adjustment Lever 3 11 Seat Slide Adjustment Lever 3 11 Main Hoist Speed 3 11 Aux Hoist Speed 3 11 Hoist Rotation Indicator HRI Displa...

Page 62: ...ane movement Getting Started The NBT50 has several interlocks that must be satisfied before operating the crane To operate the crane the machine must be started from the crane cab key switch Starting the truck from the truck cab will not allow the crane to operate There are several interlocks that will prevent the crane cab key switch from turning on the ignition power circuit for the truck igniti...

Page 63: ...e operable Power Take Off PTO Manual Shift Control The PTO is engaged when the knob on the dash or floor is pulled out and disengaged when the knob is pushed in The truck gear shift lever must be in neutral and the clutch depressed whenever the knob is moved Air Shift Control The PTO is engaged when the switch is moved to apply air to PTO and disengaged when switch is in off position The truck gea...

Page 64: ...er front stabilizer switch 2 Figure 3 1 is used to lower and raise the optional center front stabilizer To operate the center front stabilizer press the center front stabilizer switch toward activate and then press extend retract switch 7 8 The center front stabilizer automatically retracts if any of the other jacks are adjusted and must be reset if lifting is to be continued Ground Station Outrig...

Page 65: ...r Front Stabilizer Switch The center front stabilizer switch 3 Figure 3 2 is located in the center of the outrigger control panel It must be used with the extend retract switch to control the operation of the cen ter front stabilizer The center front stabilizer will retract auto matically when any of the other four jacks are retracted therefore it must be reset if lifting is to be continued Jack S...

Page 66: ...8 1 7459 16 5 5 5 7 7 7448 4 7459 1 3 3 3 8 Item Description Item Description 1 Outrigger Midspan Selector Pin 5 Outrigger Stabilizer Jack Cylinder 2 Outrigger Beam Assy Long 6 Ground Station Outrigger Controls 3 Outrigger Beam Assy Short 7 Outrigger Extend Retract Cylinder 4 Level Indicator inside cab 8 Level Indicator ...

Page 67: ...dal 14 Crane Level Indicator 3 Boom Telescope Pedal Optional 15 Truck Engine Hi Low Switch 4 Foot Throttle Pedal 16 Crane Function Power Switch 5 Display Panel Assembly 17 Remote Power Switch Optional 6 RCL Bypass Switch 18 Work Light Switch 7 Swing Brake Indicator 19 Dimmer Switch 8 Minimum Wrap Indicator 20 Skylight Wiper Switch 9 Emergency Stop Switch 21 Windshield Wiper Switch 10 A C Heater Ve...

Page 68: ...Back Adjustment 29 Seat Controls Assembly Slide Adjustment Lever 30 Main Hoist Speed Switch HI OFF LOW 31 Auxiliary Hoist Speed Switch HI OFF LOW 32 Swing Brake Control Switch 33 Swing Horn Button 34 AC Heater Climate Control Unit 35 Single Axis Controller Boom Lift Lever 36 Single Axis Controller Main Hoist Lever 37 Single Axis Controller Boom Telescope Auxiliary Hoist Lever 38 Single Axis Contro...

Page 69: ...the operator to provide a warning that the superstructure is rotating Boom Telescope Pedal Standard with Aux Hoist The crane is equipped with the boom telescope pedal only when the auxiliary hoist option is included The telescope foot pedal 3 Figure 3 4 is located on the crane cab floor and is used to extend and retract the boom Pushing down at the top of the pedal extends the boom out pushing dow...

Page 70: ...agnostic connector 13 Figure 3 4 is located on the lower part of the front control panel It is used for servicing the cab and crane s electrical system A laptop computer with an RS232 port nine pin cable connector and the appropriate electrical system software are required Contact Manitowoc Crane Care to obtain the appropriate diagnostic cable Level Indicator The bubble level indicator 14 Figure 3...

Page 71: ...lockwise Move the lever right to swing right clockwise Positioning the lever forward telescopes the boom out and pulling the lever back telescopes the boom in Swing Auxiliary Hoist If equipped with an auxiliary hoist positioning the lever forward lets out hoist cable Pulling the lever back reels the cable in Moving the lever in a diagonal direction actuates the two functions simultaneously Seat Ba...

Page 72: ... The swing control lever 38 Figure 3 5 and the telescope or auxiliary hoist control lever 37 Figure 3 5 are located on the left armrest Push the swing lever 38 forward to rotate the superstructure clockwise pull the swing lever back to rotate the superstructure counterclockwise Push the telescope lever 37 forward to extend the boom pull the lever back to retract the boom If equipped with an auxili...

Page 73: ...0 ratio Add the mixture to the heater diesel fuel tank 1 Figure 3 9 located on the outside of the cab Heater Coolant The heater coolant bottle 1 Figure 3 10 is mounted to the turret frame The coolant should contain a minimum 50 50 ratio mixture of water and antifreeze to prevent freezing or slushing WARNING Explosion Hazard Do not mix gasoline with diesel fuel Death or serious injury can occur due...

Page 74: ...ar of the crane and is also used to access the cab and superstructure area from the right side of the crane left side is shown in Figure 3 11 Two sets of holes in the crane left side decking are provided to insert the ladder 3 in the same positions as shown in Figure 3 11 Equipment Checks Prior to placing the unit in operation do a complete walk around visual inspection and look for structural dam...

Page 75: ...ailing ambient temperatures in which the crane will operate in a list of lubricants and their temperature ranges can be found in the Lubrication section of your crane s Operator Manual by contacting your local Manitowoc distributor or by contacting Manitowoc Crane Care directly Engine NOTE For National Crane engine warm up procedures refer to chassis manufacturer s manual Warm up Procedures for Al...

Page 76: ...d from all components and cylinders of the hydraulic system If there is any unusual sound coming from the crane s hydraulic pumps or motors stop the operation and engine immediately and contact a Manitowoc distributor From 10 C to 4 C 50 F to 40 F Crane operation with a load is allowed with medium engine RPM and medium function speed joystick position until the fluid reaches at least 10 C 50 F Fro...

Page 77: ... the power takeoff Turn the truck cab ignition switch to OFF Stowing and Parking When parking the crane it should be placed in the smallest most stable operational configuration that the job site practically allows by doing the following steps 1 Park the crane on a stable surface 2 Remove the load from the hook 3 Stow the swingaway jib if erected 4 Fully retract the boom and position it in the nor...

Page 78: ...in a circular arc above the center line of rotation to the suspended load Freely Suspended Load The load hanging free with no direct external force applied except by the loadline Side Load Horizontal side force applied to the lifted load either on the ground or in the air Boom Length The length from boom pivot pin to the boom nose Decals on either side of the boom shows when specific boom lengths ...

Page 79: ...ues 3 Position the boom nose over the load Do not try and drag the load with the boom or hoist 4 Perform the lift Use light variable movements of the controls when moving the load to avoid sudden stops 5 Retract and lower the boom after the lift is complete SHUT DOWN AND PREPARATION FOR ROAD TRAVEL 1 Ensure the swingaway if so equipped is properly stowed and secured or removed from crane 2 Retract...

Page 80: ...k pads and place on the stowage brackets 10 Engage the mechanical travel lock at each outrigger beam 11 Turn off the ignition and all other switches in the crane cab 12 Close and or secure all windows and doors 13 Exit the cab lock the door and stow the access ladder 14 Secure any loads or lifting devices on truck bed or body 15 Ensure tires are properly inflated 16 Disengage the Power Take Off PT...

Page 81: ...NBT50 OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES 3 National Crane Published 03 23 2018 Control 243 14 3 21 FIGURE 3 13 ...

Page 82: ...CONTROLS AND OPERATING PROCEDURES OPERATOR MANUAL NBT50 3 22 Published 03 23 2018 Control 243 14 FIGURE 3 14 ...

Page 83: ... down and single front outrigger if equipped The standard Remote 1 Figure 3 15 and its stowage bracket are secured to the load chart binder bracket 2 Batteries If the standard remote control is not used for a long period it is recommended if using rechargeable batteries that they be charged before using the remote control When the standard Remote Control 1 is in the stowed position as shown in Fig...

Page 84: ...movement To move the function more press and hold the button again When finished with the remote press the red STOP button This will only turn off the remote it will not shut off the machine If the remote is left turned on for more than 5 minutes the remote will shut itself off If any interference is present in the area and the remote does not function properly the radio s channel can be changed T...

Page 85: ...llowing functions 7648 FIGURE 3 18 5 2 1 4 3 10 6 8 9 7 11 14 13 12 20 19 16 24 22 21 23 25 17 18 15 26 27 Item Description 1 Auxiliary Hoist Enable Disabled is Default 2 On Horn Button 3 Toggle Crane RCL Screen 4 Remote Frequency Change 5 Not Used 6 RPM Default is RPM 7 Turtle Mode Default is Normal 8 50 Default is 100 9 RCL Override 10 E Stop 11 Main Hoist High Speed 12 Auxiliary Hoist High Spee...

Page 86: ...utton 2 while momentarily pressing the Frequency Change button 4 Once finished using the Crane Remote the Remote Power switch should be turned OFF and the crane cab ignition key should be turned to the OFF position The remote controller can be stored in the crane cab or the truck cab Use of rechargeable batteries or standard AA batteries is acceptable however the batteries can not be charged in th...

Page 87: ...n off the remote by pressing the red stop button to de activate the controls in order to prevent crane from functioning if the controller switches are inadvertently depressed or bumped during storage Failure to comply with these instructions may cause death or serious injury FIGURE 3 20 LCD SCREEN LAYOUTS Screen1 Actual Load Max Load Sample Screen Screen 2 Load Radius Screen 3 Boom Length Feedback...

Page 88: ...CONTROLS AND OPERATING PROCEDURES OPERATOR MANUAL NBT50 3 28 Published 03 23 2018 Control 243 14 THIS PAGE BLANK ...

Page 89: ...educed It is essential that the crane is level to within 1 of grade The bubble level that is provided on the crane is calibrated to be accurate within 1 of grade To properly level the crane the boom must be positioned over the front of the crane fully lowered to horizontal and fully retracted for cranes fitted with a boom rest the boom shall be stowed onto the rest Raise and level the crane using ...

Page 90: ... 5 Remove the front outrigger floats from the carrying brackets and place the floats under the stabilizer 6 Secure the front outrigger floats to the stabilizers with the pins and clips 7 Select the desired stabilizer with the stabilizer selector switch and press the extend retract switch to extend the stabilizer 8 Extend all four stabilizers until the truck tires are about four inches off the grou...

Page 91: ...res outlined previously when stowing or unstowing jib 9 Operate boom and turn functions very slowly and carefully when using jib since extension can increase boom length by 50 10 The area where jib swings around must be clear of obstructions personnel and power lines when stowing and unstowing jib 11 Use safety glasses when installing pins with hammer 12 Do not extend retract boom unless boom is h...

Page 92: ...a pivot point to swing jib into the deployed position 5 Locate the stowed position of attachment pins 7 Figure 4 3 If in jib attachment holes or boom sheave case jib holes remove pins from storage location 6 Remove jib swing pin 5 Figure 4 3 from top lug of jib 7 Remove stow pin 1 Figure 4 3 and stow in hook bracket 3 secure with spring clip 8 Attach tag line to sheave case end of jib 9 Using the ...

Page 93: ...ine on hoist drum NOTE The hoist cable must be routed over the mast assembly and under the roller on the mast for all configurations 15 Route loadline over jib sheave and install keeper Install line block to end of loadline 16 Remove A2B switch and weight chain assembly and install on jib tip see Figure 4 6 Be certain to use keeper provided with switch 17 Disconnect A2B cord going to boom A2B swit...

Page 94: ...blished 03 23 2018 Control 243 14 1 Stow Pin 2 Jib Stowage Bracket 3 Hook Bracket 4 Boom 5 Jib Swing Pin 6 Right Side Attachment Pins 7 Left Side Attachment Pins 8 Jib 9 Jib Retaining Pin 10 Alignment Jack FIGURE 4 3 1 2 3 4 5 6 7 8 9 10 ...

Page 95: ... can be equipped with either a two section or one section jib Certain stowing instructions may only apply to one or the other and will be noted so FIGURE 4 4 1 6 11 10 9 8 2 3 4 7 14 12 13 5 Item Description 1 Boom Base Section 2 Tele 1 3 Tele 2 4 Tele 3 5 Jib Swing Pin 6 Right Side Attachment Pins 7 Left Side Attachment Pins 8 Jack Handle 9 Mast Assembly Stowage Pin 10 Mast Assembly 11 Mast Assem...

Page 96: ...n 5 Figure 4 3 with spring clip through jib lug and boom sheave case holes This pin will keep the jib assembly in line parallel with the Ist section boom NOTE Jib swing pin 5 Figure 4 3 does not retain the jib in its stowed position on the Ist section boom 14 Using boom telescope function slowly retract boom The jib stowage bracket 2 Figure 4 3 on the side of the jib will engage the hook bracket 3...

Page 97: ...iggers Swing the boom over rear of truck chassis 2 To set the offset from zero degrees 0 to thirty degrees 30 perform the following a Slowly lower the boom until the tip of the swingaway is on the ground and the pressure on the offset pin is relieved b Remove the lock pin two washers and offset pin c Slowly elevate and telescope the boom at the same time until the offset shaft takes the full load ...

Page 98: ... pin 3 that was removed from the stowage bracket 4 to secure the mast to the jib boom 7 Install the retaining clip 5 to secure pin to mast 8 Route hoist cable in groove in sheave wheel and secure with retaining pin 6 CAUTION Use caution to avoid pinch points while positioning mast ...

Page 99: ...NATIONAL CRANE Published 03 23 2018 Control 243 14 4 11 NBT50 OPERATOR MANUAL SET UP 4 1 Mast 2 Jib Boom 3 Pin 4 Mast Stowage Bracket 5 Retaining Clip 6 Pin FIGURE 4 5 3 8277 6 1 4 2 3 5 ...

Page 100: ... hookblock Install the clamp and nuts to the rope before performing a lift Using Multiple Part Lines The hoist data chart provides information for pull limitations on the hoist with various multi part reevings These ratings are based on providing the proper operating safety factor on the cable supplied with the machine Therefore any replacement rope must meet the cable specification in this manual...

Page 101: ...Part Line Maximum Pull Normal Speed 11 250 lbs 191 fpm High Speed 5 600 Lbs 383 fpm Maximum Pull Normal Speed 22 500Lbs 95 fpm High Speed 11 200 Lbs 191 fpm Maximum Pull Normal Speed 33 750 Lbs 63 fpm High Speed 16 800 Lbs 127 fpm Maximum Pull Normal Speed 45 000 Lbs 47 fpm High Speed 22 400 Lbs 95 fpm Maximum Pull Normal Speed 56 250 Lbs 38 fpm High Speed 28 000 Lbs 76 fpm Maximum Pull Normal Spe...

Page 102: ...is National Crane s preferred type of socket Figure 4 8 Other wedge socket types are discussed under Wedge Socket Installation page 4 15 To attach a terminator wedge Figure 4 8 use the following procedure 1 Match the socket wedge and clip to wire rope size The wire rope must pass through the go hole in the wedge It must not pass through the no go hole in the wedge 2 Align the live end of rope with...

Page 103: ...aded due to the headache ball or hook block striking the ground etc Sketches A through F Figure 4 10 illustrate various ANSI approved methods for treating the dead ends of wire ropes which exit a wedge socket assembly While use of the loop back method is acceptable care must be exercised to avoid the loop becoming entangled with tree branches and other components during crane transport and with th...

Page 104: ... ft Nm 1 8 3 18 4 5 6 3 16 4 76 7 5 10 1 4 6 35 15 20 5 16 7 94 30 40 3 8 13 28 45 60 7 16 11 11 65 90 1 2 12 70 65 90 9 16 14 29 95 130 5 8 15 88 95 130 3 4 19 05 130 175 7 8 22 23 225 300 1 25 40 225 300 1 1 8 28 58 225 300 1 1 4 31 75 360 490 1 3 8 38 68 360 490 1 1 2 38 10 360 490 FIGURE 4 10 Wedge Socket Specialty Clip Specialty Wedge ...

Page 105: ...yellow arrows 1 Figure 4 11 appears in the display which indicates the rear of the superstructure is nearly directly above the Removable Counterweight stowed on the carrier deck Ensure vertical alignment of superstructure to counterweight by leaving the cab and performing a visual inspection If necessary return to cab and rotate superstructure until alignment is achieved 5 Retract left and right p...

Page 106: ...erator s seat A green LED 6 Figure 4 13 on the left side of the Counterweight Switch Panel will illuminate to indicate the panel is operational If a Counterweight Removal Cylinder Raise or Lower Button 4 5 Figure 4 13 is pressed without first pressing and holding a Power Button 1 Figure 4 13 a red LED above that button will flash a Press and hold a Power Button FIGURE 4 12 1 Cast Section Top 3000 ...

Page 107: ...TE If top counterweight hits wear pads on the superstructure when raising swing crane to re align counterweight to mounting lugs lower counterweight back down onto mounting lugs on carrier deck to realign counterweight on cylinder pins then raise counterweight again 11 Secure Removable Counterweight to left and right sides of superstructure using pins 4 Figure 4 12 NOTE It may be necessary to jog ...

Page 108: ...lash a Press and hold a Power Button b Press and hold the left and right Counterweight Removal Cylinder Raise Buttons c Release the left and right Counterweight Removal Cylinder Raise Buttons when the cylinders are fully raised 6 Remove pins 4 Figure 4 12 that secure Removable Counterweight to superstructure NOTE It may be necessary to jog the cylinders up and down to remove pins 7 Using Counterwe...

Page 109: ...e service intervals specified are for normal operation where moderate temperature humidity and atmospheric conditions prevail In areas of extreme conditions the service periods and lubrication specifications should be altered to meet existing conditions For information on extreme condition lubrication contact your local National Crane Distributor or Manitowoc Crane Care Environmental Protection Di...

Page 110: ...80 F 138 C The grease is a heavy duty extreme pressure type lubricant Lubricate Low Temp or equal Antifreeze Coolant for Cab Heater The standard antifreeze coolant filled from the factory is intended to provide protection against freeze up down to 36 C 34 F and boil over up to 129 C 265 F using a 15 psi pressure cap Anti wear Additives Excessive wear in the system may cause a loss in volumetric ef...

Page 111: ...st be sampled The hydraulic tank breather should also be inspected to assure that it is not restricting air flow into and out of the reservoir To inspect the hydraulic oil fill a small glass container with a sample of the reservoir oil and another glass container with fresh oil Let the samples stand undisturbed for one or two hours Then compare the samples If the reservoir oil is heavily contamina...

Page 112: ...Gear Lubricant 6829012964 6829014058 HYDO Hydraulic Oil 6829006444 6829006993 EP OGL Open Gear Lubricant CEPLATTYN 300 Spray NLGI Grade 1 2 6829102971 6829102971 AGMA EP 4 Extreme Pressure Gear Lubricant 6829100213 6829103636 WRL Wire Rope Lubricant 6829015236 6829010993 EO 20W 20 Engine Oil Light non EP Oil Mil L 46152 6829005570 TES 295 TES295 Compliant Fluid 6829101690 NOTE Cold weather lubrica...

Page 113: ...y As Required Semi Annually 2 Hydraulic tank Oil filter Change or clean After first 40 Hrs Quarterly thereafter 3 Hydraulic tank suction filter inside tank Change or clean After first 40 Hrs Quarterly thereafter 4 Breather Hydraulic oil reservoir Clean Monthly 5 Sheave pins boom 5 plcs jib 1 pl block 1 pl rooster sheave 1 pl EP MPG Grease gun Weekly 6 Boom pivot pin EP MPG Grease gun Monthly 7 Lif...

Page 114: ... EP MPG Grease Gun Weekly 18c Extend Sheaves Opening on tele 1 102 foot and 128 foot Booms Opening on 3rd Section on 102 foot and 128 foot Booms EP MPG Grease Gun Weekly 19 Retract Sheaves Fully retract the booms until the retract sheave grease zerks can be accessed from the rear of the Booms or extend the booms until the zerks are visible through the access holes at the center of boom EP MPG Grea...

Page 115: ...r jacks with a suitable brush or putty knife 3 Extend and retract the outriggers several times until the grease is evenly spread 4 Repeat as necessary Hoist Brake Oil Check Hoist Brake Oil To check the hoist brake oil remove the inspection plug 2 Figure 5 3 and visually inspect the oil level The fluid should be level with the bottom of the inspection hole If more fluid is needed add through the br...

Page 116: ...rom 23 C to 66 C 10 F to 150 F For operation outside this range contact Manitowoc Crane Care for recommendations Swing Gearbox and Brake Oil Check Swing Gearbox oil level The oil in the gearbox and brake sections is recommended to be changed after first 50 hours of operation and every 1000 hours or 6 months of usage Gearbox oil is drained by removing the drain plug and vent See Figure 5 3 1 Examin...

Page 117: ... rod can ruin the cylinder It is recommended that all exposed cylinder rods be protected using Boeshield T 9 Premium Metal Protectant Manitowoc Crane Care has Boeshield T 9 Premium Metal Protectant available in 12 oz cans that can be ordered through the Parts Department NOTE Cylinder operation and inclement weather will remove the Boeshield protectant Inspect machines once a week and reapply Boesh...

Page 118: ...hing that would be classified as hazardous under OSHA Regulation 29CFR 19 10 1200 The product is a liquid blend of petroleum derivatives rust inhibitors water repelling and water displacing agents Special equipment is used to spray a light film onto the entire undercarriage and various other areas of each new crane prior to shipment When applied the product has a red tint to allow applicators to v...

Page 119: ...o remove excess water NOTE Polishing and waxing using an automotive type wax is recommended to maintain the original paint finish Inspection and Repair Immediately following cleaning Manitowoc Crane Care recommends an inspection to detect areas that may have become damaged by stone chips or minor mishaps A minor scratch one that has not penetrated to the substrate surface can be buffed with an aut...

Page 120: ...gged on the unit Use of pressure pots to apply the treatment to the unit being processed is recommended Carwell treatment is available in 16 ounce spray bottles from Manitowoc Crane Care order part number 8898904099 After application of the treatment is complete wash or clean film residue from lights windshield grab handles ladders steps and all access areas to crane as necessary Please contact Ma...

Page 121: ...E Published 03 23 2018 Control 243 14 5 13 NBT50 OPERATOR MANUAL LUBRICATION PROCEDURE AND CHARTS 5 7650 66 1 3 4 4 9 4 12 5 14 14 14 2 7 10 16 15 13 7 8 11 5 8 13 15 4 8 9 7650 67 6 3 FIGURE 5 8 17 16 12 8 6 8 8 8 ...

Page 122: ...de turntable 6 Wire Rope 7 Boom Nose Pins Clips 8 All Hardware Clips Pins Hose Connections not painted Outrigger Pins Clips 9 Headache Ball Hook block 10 Headache Ball Hook Block Tiedown 11 Mirror Mounting Hardware 12 Powertrain Hardware 13 Outrigger Hose Connections 14 Outrigger Pins Clips 15 Entire underside of unit 16 Turntable Bearing Fasteners 17 Outrigger Beam Hardware 18 Boom Extension Hard...

Page 123: ...the unit to ensure safe and proper operation If replacing a missing fastener or tightening a loose fastener refer to the applicable torque chart in Section 1 of the Service Manual Should a defect be found a determination must be made as to whether the deficiency is a safety hazard or though not yet a safety hazard needs to be monitored in the monthly inspections The inspections are separated into ...

Page 124: ...1 Battery water level 2 Tire pressure 3 Lubrication as specified by the Lubrication Chart 4 Torque the T box mounting bolts during the first month of operation and periodic inspections thereafter 5 Torque the swing bearing mounting bolts during the first month of operation and periodic inspections thereafter 6 Torque the boom wear pad retaining bolts during first month of operation and monthly the...

Page 125: ... Rope may be purchased through Manitowoc Crane Care Any deterioration observed in the wire rope should be noted in the equipment inspection log and an assessment concerning wire rope replacement should be made by a qualified person Keeping Records A signed and dated report of the rope s condition at each periodic inspection must be kept on file at all times The report must cover all inspection poi...

Page 126: ... rope is subjected to abnormal scuffing and scraping Daily Inspections All cable in continuous service must be inspected at the beginning of each work day Inspect the wedge socket and length of cable that is used in daily operation The end should be inspected for abrasion corrosion broken wires and loose or broken servings Inspect the remainder of the cable length used for daily operations for poi...

Page 127: ...mm 0 063 for rope diameters 22 2 mm 0 875 in to 28 6 mm 1 125 in One outer wire broken at its point of contact with the core of the rope which has worked its way out of and protrudes or loops out from the rope structure Manitowoc recommends that for cable extended booms a single damaged wire rope assembly shall require replacement of the complete set of extension cables Manitowoc recommends that b...

Page 128: ...ain the oil into a suitable drain pan The oil will run slowly because air must enter as oil drains out 3 Be careful to prevent dirt or foreign matter from entering the system 4 Replace with proper oil as described above Lubrication Add proper lubrication oil to all pivoting sections every three months Rust Prevention Check the ram every three months for any sign of rust or corrosion Clean as neede...

Page 129: ...may be equipped with other tire sizes or the same size tires rated differently Always check the tire sidewalls to verify the maximum capacity and inflation Inflation pressure and loading must not exceed the values shown on the wheel or rim Tire and Load Inflation Tables Letters in parenthesis denote the load range for which the bold face loads are a maximum International load index numbers are sho...

Page 130: ...or Trucks Busses and Trailers Used in Normal Highway Service Radial Ply Tires Mounted on 15 Drop Center Rims Tire and Rim Association Standard Radial Ply Metric Tires for Trucks Busses and Trailers Used in Normal Highway Service Radial Ply Tires Mounted on 15 Drop Center Rims Tire and Rim Association Standard ...

Page 131: ...e Tires for Trucks Busses and Trailers Used in Normal Highway Service Tires Used as Singles Mounted on 15 Drop Center Rims Tire and Rim Association Standard Radial Ply Tires for Trucks Busses and Trailers Used in Normal Highway Service Radial Ply Tires Mounted on 15 Drop Center Rims Tire and Rim Association Standard ...

Page 132: ...wing 23 gpm at 3000 psi 87 l min at 205 bar Swing Park Brake Hydraulic released disc released at 175 psi 12 bar Cab Air Conditioner 8 gpm at 1450 psi Reservoir Capacity 102 gal 386 l Reservoir Return Filter 5 micron Reservoir Suction Filter 250 micron Air Conditioner Air Conditioner Hydraulic System 3500 100 psi Minimum Evacuation Time 30 minutes Refrigerant Charge Levels 2 0 pounds 0 5 Ounce Addi...

Page 133: ... 10 sec 3 sec Counterweight Weight NBT50 3 200 lb 1 452 kg Weight NBT55 6 200 lb 2 812 kg General Capacity NBT50 50 tons 45 5 metric tons at 8 ft 2 4 m radius NBT55 55 tons 49 9 metric tons at 8 ft 2 4 m radius Overall Length 39 4 ft 12 0 m with 102 ft 31 m Boom Overall width 101 6 in 2 6 m Overall Height 155 5 in 3 95 m Boom Length 102 ft 4 section Retracted 31 3 ft 9 95 m Extended 102 ft 31 09m ...

Page 134: ...MAINTENANCE CHECKLIST OPERATOR MANUAL NBT50 6 12 Published 03 23 2018 Control 243 14 THIS PAGE BLANK ...

Page 135: ...Configuration 7 9 Confirmation 7 9 Operating Mode 7 9 TARE Function 7 10 Operational Limits 7 11 Slew Angle Limit 7 11 WADS Limit 7 11 Boom Angle Limit 7 12 Tip Height Limit 7 12 Radius Limit 7 12 Delete All Limits 7 13 Tools 7 13 Joystick Output 7 13 RCL Sensor Calibration 7 14 Slew Sensor Calibration 7 15 Boom Angle Calibration 7 16 Boom Length Calibration 7 16 Rod Side Pressure Sensor Calibrati...

Page 136: ...mpares the actual conditions with the load chart If an overload condition is sensed audible and visual warnings are generated and the boom down telescope out and hoist up main and auxiliary controls are disabled These are the functions that worsen the overload condition Components RCL display on the operators console Length angle sensor with cable reel mounted on side of boom Lift cylinder pressur...

Page 137: ... Part Number and Calibration Chart Machine Information and Warnings Crane Electrical Fault Monitoring Hour Meter Lift Cylinder pressure data The Main Menu screen has five function keys 1 Figure 7 2 that are used to select the functions shown on the display screen above each key NOTE On start up of the RCL the National Crane logo screen will appear for approximately 5 10 seconds then Screen 1 page ...

Page 138: ... a user set limit A positive slew angle is to the right side of the boom rest 10 to 3600 Tip Height Limit The tip height is measured from the ground to the tip of the boom This monitors the height of the boom tip to alert the operator of a user set limit assumes maximum outrigger deployment RCL Angle Limit The angle limit is measured by the boom angle This is to alert the operator of user defined ...

Page 139: ...ar load chart mode If the crane is within the EEPROM value range for Over the Rear the GREEN icon is shown If the crane is within 10 of inside limits of these EEPROM values the icon is yellow See Figure 7 3 CWT Removal Slew Position Shown to indicate that the operator is approaching YELLOW region where the CWT slab s can be pinned to the turret box See Figure 7 3 FIGURE 7 3 ...

Page 140: ... with a jib the following set up screens will not appear The system will detect that no jib has been installed on the crane and by pass these screens Select the RCL setup icon on the main menu to begin RCL setup Figure 7 2 Screen 2 Is a jib attached to the boom nose Select 1 or 2 NOTE Screens 3 2 3 3 and 4 2 do not apply to cranes equipped with a fixed or non telescoping jib extension and should n...

Page 141: ...gured at the factory it is determined if the crane is equipped with or without a removable counterweight If your crane is not equipped with the removable counterweight option the following counterweight configuration screens will not be shown Screen 5 1 Select either 1 counterweight or 2 no counterweight This screen is only for the NBT50 Counterweight Configuration Screen 5 2 Select either 1 or 2 ...

Page 142: ...after machine is in Full Span If user attempts to select OK before Full Span condition is met the OK button will color RED when depressed and the the user can override the setup using the arrow keys If the user selects a setup configuration different than the one selected by the RCL the O R override icon will be displayed on screen 9 and on the RCL Operating Mode Screen shown on page 7 9 Screen 6 ...

Page 143: ... within 2 hours the operator can select OK at Screen 9 Selecting OK will automatically return the RCL to the configuration used at shutdown Re configuration of the RCL will not be required Screen 9 OPERATING MODE After the RCL is setup is complete the RCL Operating Mode screen is displayed The key functions at the bottom of the RCL Operating Mode screen are MAIN Pressing this key returns to the MA...

Page 144: ...rts of line selection screen Limit pressing enables the RCL limits options menu Tare pressing temporarily zeros out the Actual Load Indicated on the screen to show the weight of the load only TARE Function The TARE function calculates the net weight of the load Total Load Hook Block The TARE function must be activated before lifting To use the TARE function Rig the load to the hook block Before li...

Page 145: ...ew angle Select DEL function key 2 or 4 Figure 7 2 to remove the current setting The RCL 1 screen is updated in real time ESC to return to previous screen when finished Use the function key with a for counter clockwise settings and the function key with a for clockwise slew settings The current slew angle is shown in the top right corner xxx x of the Limit 1 screen The left and right slew angle li...

Page 146: ...isplay screen then select the following Select SET function key 1 to store the current boom tip position as the MAX Select DEL function key 2 to delete the established limit ESC to return to previous screen with no inputs The current boom tip height is always shown in the upper right hand corner Radius Limit RCL Limit 5 Move the crane boom to the desired boom radius it will appear on the display s...

Page 147: ...ect the far right icon ON OFF reminder interval Reset the interval reminder to 40 250 500 hr Screen Brightness Allows adjustment of backlight over a range of 15 steps Up and down indicator in the time and password boxes correspond to button 4 OK to modify selection Joystick Output The crane is equipped with electronic joysticks which allow for more customization from the operator The maximum speed...

Page 148: ...urrent setting Default value for the Joystick Output screen is all values 100 as shown in Joystick Output 2 screen Joystick Output 2 The operator can also set the desired output for each function as shown in Joystick Output 3 screen Using the arrow keys select the new percentage using the vertical bar The new value will turn yellow indicating it is the current value Joystick Output 3 screen Joysti...

Page 149: ...procedure based on your crane s configuration Cranes without Removable Counterweight Select 1 from the Main Sensor Calibration Menu screen to begin the slew angle calibration Slew Sensor Calibration Position the boom on the truck centerline in the boom rest and select OK from the Slew Sensor Calibration screen There are two types of slew sensors If the server is the analog version screens A and B ...

Page 150: ...hown one at a time starting with the fully retracted position on the Boom Length Calibration screen Once OK is pressed for fully retracted position the fully extended position is activated and will appear Rod Side Pressure Sensor Calibration Each transducer must be calibrated to the zero position separately To zero the rod side transducer the base transducer electrical cable must be disconnected S...

Page 151: ...n appears after OK is pressed the outrigger sensor for that screen will have to be checked for proper function and wiring See new error screen to communicate which sensor or sensors need investigation CWT Switch Panel Calibration If equipped Select 8 from the Main Sensor Calibration Menu page 7 15 to begin CWT panel calibration CWT Panel Calibration Confirm that you have disconnected the proper el...

Page 152: ...CL display software version is shown This software pertains to all the graphics shown on the RCL display Crane Software Version The current crane software version is shown This software pertains to the software used to control the crane functionality This is also the version of the diagnostic file that is needed to connect to the crane for troubleshooting RCL Software Version The current RCL softw...

Page 153: ...l drops below 20 of maximum capacity the general warning light is shown on the operating mode screen and the truck diesel fuel level icon is highlighted YELLOW on the diagnostics screen Engine Oil Temperature If the truck engine oil temperature rises above 250 F the general warning light is shown on the operating mode screen and the truck engine oil temperature icon is highlighted RED on the diagn...

Page 154: ...through 20 with maximum of 20 faults 2 Device Number 3 Group Number 4 Index 5 Error Number Logged Fault Box B Logged faults are not currently active use the up down arrows to scroll through the codes The crane control system will display up to 20 of the most recent logged faults or errors in the crane and RCL control system s The up down arrows can be used to scroll through the active faults This ...

Page 155: ...em 6 6 Installing Cable on the Hoist 4 13 Jib Maintenance 4 9 Jib Operation 4 4 Jib Removal 4 8 Jib Safety Information 4 3 Lifting the Load 3 19 Load Chart 3 18 Lubrication Points 5 3 Maintenance 2 27 Model Specific Information 2 39 Multi part Line Reeving 4 12 Operating Mode 7 9 Operating Procedures 3 14 Operational Aids 2 4 Operational Limits 7 11 Operator Information 2 2 Operator Qualifications...

Page 156: ... 1 2 Tire Load And Inflation Table 6 7 Tools 7 13 Transporting the Crane 2 31 Travel Operation 2 32 Truck Cab Controls 3 3 Wedge Sockets 4 14 Wind Forces 2 6 Wire Rope Lubrication 5 9 Work Practices 2 33 Work Site Location 3 17 ...

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