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North American Clutch & Driveline

Rockford, Illinois

Phone: (800) 383-9204

(815) 282-7960

Fax (815) 282-9160

www.naclutch.com

99

WARRANTY

Equipment for which this manual was written has a limited warranty. For details of the warranty, 

refer to the warranty statement at the end of this manual.

DESCRIPTION AND SPECIFICATIONS

GENERAL INFORMATION

The SP318AM and SP318SBAM Series NACD Power Take-Offs are engine-mounted power 

take-offs that use cast iron one-piece housings and contain an integral clutch 18 inches in 

diameter. The engine drives the clutch through a drive ring that is bolted to the engine flywheel 

and connected to the clutch through internal teeth that mesh with external teeth on the clutch 

friction plate(s). Clutch engagement and disengagement for most units is accomplished by use 

of the external hand lever assembly. Some units may use other actuation methods.

Main bearings are lubricated and cooled with grease , depending upon the design specifications. 

Most units use pilot bearings that are pre-lubricated and sealed for life. Those that require 

periodic relubrication are lubricated through a grease fitting located in the output end or side of 

the clutch shaft.

Finding The NACD Power Take-Off 
Model And Serial Number

The nameplate identifies the housing 

size, clutch size, assembly number 

and the serial number of the unit. 

The assembly and serial numbers 

are necessary to identify the correct 

parts for your Power Take-Off.

SAE Housing Size 

& Clutch Size

NACD Part #

Customer Part #

Serial #

Содержание SP318AM Series

Страница 1: ...NACD Power Take Off Service Manual 1022764AM SP318AM and SP318SBAM Series Includes Installation Operation Maintenance and Overhaul Instructions ...

Страница 2: ...North American Clutch Driveline Rockford Illinois Phone 800 383 9204 815 282 7960 Fax 815 282 9160 www naclutch com 2 ...

Страница 3: ...uld be employed as necessary to assure that safe operations and a safe environment exist under prevailing conditions Use proper guards and other suitable safety equipment devices and procedures that may be desirable or specified in safety codes or as necessary to prevent accidental injury to person s or property These devices are neither provided by NACD nor are they the responsibility of NACD OWN...

Страница 4: ...r Limits Torque Values for Fasteners INSTALLATION Installation Tips Prior to Installation Ref SAE J1033 and J617 Drive Ring Installation Ball Type Pilot Bearing Installation PTO Installation to Engine or Driving Member Hand Lever Position for Power Take Offs Position and Measure Alignment of the Sheave Allowable Side Loads Alignment U Joint Type Installation Setting Up Air Engagement on Power Take...

Страница 5: ...ing Disassembly Configuration C Clutch Shaft and Housing Disassembly Configuration D CLEANING AND INSPECTION Cleaning and Inspection ASSEMBLY Clutch Assembly Clutch Shaft and Housing Assembly Configuration C Clutch Shaft and Housing Assembly Configuration D Install the Operating Shaft and Throwout Yoke PTO Final Assembly ILLUSTRATIONS List of Illustrations Parts Identification List Exploded View S...

Страница 6: ...d exploded views in the Illustrations section to facilitate ordering spare or replacement parts Ordering Parts All replacement parts or products including hoses and fittings must be of NACD origin or equal and otherwise identical with components of the original equipment Use of any other parts or products will void the warranty and may result in malfunction or accident causing injury to personnel ...

Страница 7: ...ssist in obtaining trouble free operation Schedules are provided for the recommended maintenance of the equipment and if observed minimum repairs aside from normal wear will result In the event a malfunction does occur a troubleshooting table is provided to help identify the problem area and lists information that will help determine the extent of the repairs necessary to get a unit back into oper...

Страница 8: ...the engineering information specified Proper installation maintenance and operation procedures must be observed Inspection should be made as necessary to assure safe operations under prevailing conditions Proper guards and other suitable safety codes should be provided These devices are neither provided by NACD nor are they the responsibility of NACD SOURCES OF SERVICE INFORMATION Each series of m...

Страница 9: ...al teeth that mesh with external teeth on the clutch friction plate s Clutch engagement and disengagement for most units is accomplished by use of the external hand lever assembly Some units may use other actuation methods Main bearings are lubricated and cooled with grease depending upon the design specifications Most units use pilot bearings that are pre lubricated and sealed for life Those that...

Страница 10: ...offs Refer to BOM and NACD Power Take Off Reference Listing SAE Hsg No PTO Model Grease Lubricated Main Bearing s Ductile Iron Drive Ring Solid Drive Plate s Split Drive Plate 0 SP318AM Series SP318SBAM Series Grease Grease 2350 2350 2100 N A mm 647 70 mm 711 2 mm 679 45 mm 14 30 Qty 16 inches 25 50 inches 28 00 inches 26 75 inches 0 563 A Housing Pilot Diameter B Housing Flange O D C Bolt Circle ...

Страница 11: ...e flywheel pilot flange is 100 07 mm 3 94 in Roller Type Table 3 Roller Type Pilot Bearing Dimensions Roller Bearing Bearing O D Bearing Nominal Width C Bearing Nominal Width tolerance 101848AM 100 mm 3 94 in 39 62 mm 1 5600 in 0 5 mm 0 0025in PTO Model Rotate Hub Nut Clockwise the Additional Amount Shown SP318AM Series SP318SBAM Series 240 270 degrees 150 180 degrees Nut Hub Advance Table 6 Hub N...

Страница 12: ...purge the old grease from the cavity when new grease is added Hand pack the bearings before assembly Hand packing requires that the roller elements and bearing races be coated with grease After assembly remove the purge plug before grease is added Add grease through the grease fitting 51 until grease is visible in the open hole Always rotate the shaft while adding grease to the bearing cavity Run ...

Страница 13: ... used with SP318AM and SP318SBAM series models used in side load applications and recommends that a support plate be used for in line applications Figure 2 Typical Support Plate Illustration Table 8 Support Plate Dimensions Refer to assembly drawing Angular offset of the through holes must be calculated with respect to orientation of sheave housing Holes are equally spaced PTO Model A Bore Dia 127...

Страница 14: ...TS Table 9 Wear Limits Bearing Carrier Bore Dimensions Refer to BOM for the Bearing Carrier Housing Part Number used in your PTO mm mm inches inches Bore Dim A Maximum Bore Dim B Maximum Illustration Number Housing Sheave Housing or Bearing Carrier Part Number 1016454AM A7574AM A7576AM A7576AAM 180 0350 215 0466 170 0378 170 0378 180 0350 n a n a n a 7 0880 8 4664 6 6944 6 6944 7 0880 n a n a n a ...

Страница 15: ...lutch Shaft Part Number used in your PTO mm mm mm inches inches inches Pilot Bearing Journal Min Main Bearing Journal Dim A Min Pilot Bearing Journal Min Shaft Part Number Illustration Number A7577AAM A7598AM 1016689AM 4 4 3 none none none 120 0125 120 0125 120 0150 80 0125 80 0125 120 0150 none none none 4 7249 4 7249 4 7250 3 1501 3 1501 4 7250 Figure 4 Clutch Shaft Illustrations ...

Страница 16: ...ate table to obtain the correct torque valve Note All threads and bearing face to be lubricated with light oil film prior to assembly Table 11 U S Standard Fine and Coarse Thread Capscrews Bolts and Nuts N m N m lb ft lb ft SAE Grade 5 SAE Grade 8 Thread Diameter 1 4 5 16 3 8 7 16 1 2 9 16 5 8 3 4 7 8 1 1 1 8 1 1 4 8 11 18 23 34 39 50 58 81 95 111 133 163 190 278 332 447 529 671 793 834 997 1152 1...

Страница 17: ...4 3 4 14 1 11 1 2 1 1 4 11 1 2 1 1 2 11 1 2 11 5 14 34 36 5 68 73 108 115 115 7 5 9 21 5 23 40 5 46 68 75 75 8 5 10 5 25 27 50 54 80 85 85 5 5 6 5 16 17 30 34 50 55 55 M6 M8 M10 M12 M16 M18 M20 M22 M24 M30 9 10 21 25 43 49 74 86 179 205 247 281 348 400 475 541 603 693 967 1113 12 14 31 35 60 68 104 120 256 294 350 398 493 567 669 762 848 976 1674 1926 14 16 34 40 70 80 121 139 298 342 412 469 581 ...

Страница 18: ...5 11 5 16 20 24 5 24 5 34 40 5 54 75 88 88 108 108 108 108 108 12 16 20 24 34 54 75 75 88 108 108 3 5 8 5 12 15 18 18 25 30 40 55 65 65 80 80 80 80 80 9 12 15 18 25 40 55 55 65 80 80 Table 14 Straight Threaded Tube Fittings Hose Fittings and O Ring Plugs INSTALLATION INSTALLATION TIPS Tapered Roller Bearing Adjustment SP318AM and SP318SBAM Series Power Take Off s have ball or spherical roller type...

Страница 19: ...allation in this Installation section Avoid excessive misalignment between the engine and PTO Check the following if abnormal wear of parts exists 6 4 5 2 3 Excessive loads tend to deflect parts to which PTO s are mounted A dial indicator can be mounted on a rigid part of the engine or independently on the foundation to determine deflection under actual operating conditions See Support Plate Belt ...

Страница 20: ...eration resulting in bearing failure and shortened power take off service life Power Take Off deflection due to loads imposed by the application should not exceed specific limits shown in PTO Deflection in the Description and Specifications section Deflection should be measured at the support plate location on the power take off or main bearing area of the housing if no support plate is used When ...

Страница 21: ...ior to starting the engine A The throwout collar is lubricated by grease through grease fitting on the outside of the main housing B All SP318AM and SP318SBAM Series main bearings are lubricated by grease through grease fitting in the housing or bearing carrier C If used the sealed for life pilot bearing should not be lubricated during service D Pilot bearings designed for periodic lubrication mus...

Страница 22: ...nce Consequence the Power Take Off should be removed and the source of Interference found and corrected NACD will not be responsible for system damage caused by engine to NACD match up regardless of the cause of interference This engine crankshaft end play check is considered mandatory Note All measurements must be taken with the engine or motor mounted on its supports after the flywheel and housi...

Страница 23: ...ft through on entire revolution and note the runout The total indicator reading T I R must not exceed SAE 0 Housing 0 41 mm 0 016 in Note The flywheel and crankshaft of the engine must be held against either the front or rear of the crankshaft thrust bearing while the total indicator sweep T I R is being made Rotate the shaft through one entire revolution and note the runout The total indicator re...

Страница 24: ...25 4 mm per inch of flywheel diameter Note The flywheel and crankshaft of the engine must be held against either the front or rear or rear of the crankshaft thrust bearing while the total indicator sweep T I R is being made Readjust the indicator stem so it rides on the driving ring pilot bore of the flywheel Rotate the shaft through one entire revolution and note the driving ring bore eccentricit...

Страница 25: ... surface imperfections such as nicks burrs and sharp edges on the O D or the surface that will be mounted against the flywheel face Use crocus cloth or emery cloth to remove any surface imperfections such as nicks burrs and sharp edges in the I D of the flywheel pilot bore or on the face that will be in contact with the drive ring Position the drive ring against the flywheel piloted in the mountin...

Страница 26: ...g PTO INSTALLATION TO ENGINE OR DRIVING MEMBER Clean the PTO housing flange flywheel housing flange and pilot bearing bore of any debris Make sure the housing flange and flywheel housing flange are free of surface imperfection such as nicks burrs and sharp edges Remove them using fine emery cloth or crocus cloth Install a minimum of three guide studs in the flywheel housing located approximately 1...

Страница 27: ...ption and Specifications section of this manual Note PTO housing to flywheel housing attachment screws must be grade 5 or better All except SP318SBAM models SP318SBAM skip to step 8 4 Rap the output end of the main shaft with a soft hammer to remove any preload on the main bearings and or pilot bearing This step must not be omitted Bearing failure may result 5 Measure the crankshaft endplay again ...

Страница 28: ...tall three threaded guide pins in the holes to support the sheave housing as it is being removed Remove the remaining capscrews 48 and remove the sheave housing Install the sheave Use a hydraulic power unit to properly position the sheave 8 9 10 Again using the three dowel guide bolts install the sheave housing Be sure to orient it properly for the application Install hex head capscrews in all but...

Страница 29: ...racy with at least one other revolution Read the total amount of dial indication sweep Total runout must not exceed 0 254 mm 0 010 in T I R Mark the high spot as indicated when the dial indicator reaches its maximum progress point in the clockwise direction Repeat at the other two locations as shown marking the high spot of each Total runout must not exceed 0 254 mm 0 010 in T I R Note All three r...

Страница 30: ...nstallation Tips in this section to measure and assure that excessive deflection does not occur when the belt are tightened Install the hand lever assembly 53 and torque the hex head capscrew to the proper specifications given in Torque Values for Fasteners in the Description and Specification section of this manual 19 20 21 HAND LEVER POSITION FOR NACD POWER TAKE OFFS Normal Position Operating Sh...

Страница 31: ... vertical operating POSITION AND MEASURE ALIGNMENT OF THE SHEAVE 1 Align the driver and driven shafts so that the faces of the sheaves are aligned and parallel to each other Misalignment must be LESS THAN of 1 degree between the faces 2 Position the sheave driver sheave on the PTO shaft so it is aligned with the driven sheave on equipment being driven by the PTO 3 Calculate MAXIMUM allowable misal...

Страница 32: ...hone 800 383 9204 815 282 7960 Fax 815 282 9160 www naclutch com 32 Figure 18 Align Sheaves to Specifications ALLOWABLE SIDE LOADS Figure 19 Allowable Side Pull and Formula to Determine Applied Load See alternate illustrations for Spread Bearing Models ...

Страница 33: ...pport Plate Specifications in the Description and Specifications section of this manual Note SP318ILAM Power Take Offs are recommended for in line not side loaded applications L Actual Applied Load Lbs N Shaft Speed RPM D Pitch Diameter in at Sheave etc F Load Factor 1 0 for chain or gear drive 1 5 for timing belts 2 5 for all V belts 3 5 for flat belts LF 2 1 for reciprocating compressors and oth...

Страница 34: ...ll further prevent vibrations which cause premature PTO bearing failure 4 Proper lubrication of the PTO is important for satisfactory service Refer to lubrication specifications in the Descriptions in the Specifications section of this manual Align the center lines of the PTO shaft and the input shaft of the driven unit One possible method is described below 5 To align the engine and gear head by ...

Страница 35: ...GAGEMENT ON NACD POWER TAKE OFFS 1 The cylinder should be located so that the piston moves forward and backward in exactly the same direction as the engagement lever and is aligned so it travels in exactly the same plane 2 The air cylinder must be of sufficient size to operate the required torque to engage the clutch It must have some means to make adjustment on the piston stroke 3 Air pressure mu...

Страница 36: ...otted connector similar to the one illustrated below may be used 6 The air cylinder must be readjusted when the clutch is readjusted and any time the travel or position moves from the specifications described above Determine the length of travel for the engaging cylinder 7 Multiply the length of the hand lever by the value shown in the following chart This provides the approximate required length ...

Страница 37: ...alue in the chart below by the length of the hand lever in inches This provides the required force in pounds that must be provided by the piston Note periodically disconnect the power cylinder to measure the clutch engagement force Refer to Clutch Adjustment in the Maintenance section mm Force Newtons Model Model inches Force pounds Engaging Stroke Travel at 25 4mm 1 in Engaging Force Required in ...

Страница 38: ...es designed with multiple clutch driving plates have a clutch centre plate located between the driving plates The clutch centre plate and pressure plate are driven through internal teeth that mesh with external teeth on the clutch hub Until clutch engagement is initiated the output components do not rotate During clutch engagement the clutch pressure plate is moved to clamp the clutch friction pla...

Страница 39: ...w clutch engagement at 1 000 rpm or below Under extreme circumstances where high inertia loads must be picked up the engine may have to be operated at higher speeds while the engagement occurs as engaging the clutch at 1 000 rpm or below may result in stalling the engine Clutch engagement should occur at the lowest possible engine rpm Heavy inertia loads may be brought up to engine speed by a seri...

Страница 40: ...required clutch engagement force The clutch engagement force must be at the proper level to realize long life of the PTO clutch If this engagement force seems low refer to the Clutch Adjustment Procedure in the Maintenance section of this manual Insufficient clutch engagement force can cause clutch slippage resulting in catastrophic clutch failure The engagement lever must be located in the proper...

Страница 41: ...arings and Roller type pilot bearings must be installed properly Some pilot bearings are to be greased periodically see Lubrication this Maintenance section Lubrication 3 Verify that the PTO lubricated prior to starting the engine and at all times during operation Throwout bearing failures may be among other causes the result of improper lubrication Clutch Adjustment 4 Check frequently to insure t...

Страница 42: ...rly aligned during servicing or maintenance procedures See information regarding Alignment in the installation section of this manual Support Plate 7 When mounting the engine and Power Take Off in the machine a customer supplied support plate may be required to support the output end of the PTO housing Proper installation and alignment of the support plate must be maintained Periodically check to ...

Страница 43: ...oper side that do not exceed specified limits shown in Allowable Side Load Pulls in this Maintenance sect and PTO Deflection in the Description and Specifications section Air Engagement Mechanisms 10 Air engagement mechanisms remain properly adjusted at all times See Setting Up Air Engagement on NACD Power Take Offs in the installation section LUBRICATION Refer to the NACD Power Take Off Reference...

Страница 44: ...282 7960 Fax 815 282 9160 www naclutch com 44 Figure 22 Lubrication Locations Refer to the NACD Power Take Off Reference Listing in the Description and Specifications section the exploded views in the illustration section and Engineering Drawings near the back of this manual ...

Страница 45: ...ng carrier 55 or sheave housing All Models with grease lubrication and with a purge plug in bottom of bearing carrier Some models bearing housing Configuration B for example were designed with a plug 71 at the bottom of the bearing carrier to help purge the old grease from the cavity when new grease is added Item Amount Amount Notes Throwout Collars Main Bearings Grease Operation Shaft Pilot beari...

Страница 46: ...owout Collar All Models SP318AM and SP318SBAM Series Apply 1cc of grease one shot from a grease gun daily before start up and then every 8 10 hours operation thereafter through the fitting on the tapered part of the housing Pilot Bearing All Models SP318AM and SP318SBAM Series except sealed for life style bearings If the pilot bearing supplied with your power take off is to be periodically lubrica...

Страница 47: ...required Adjustment measurements are made by fitting a torque wrench with a 1 socket over the hex end located at the bottom of hand lever Grasp only the torque wrench when making measurements 1 Disconnect any power engagement devices from the operation shaft if so equipped To Adjust The Clutch 2 Remove the instruction cover plate 45 from the housing 44 and turn the clutch shaft until the adjusting...

Страница 48: ... of this manual FIELD ADJUSTMENT TAPERED ROLLER BEARINGS Side loaded PTO applications Except SB Models Refer to the exploded views in the illustration section All Models There is no adjustment of ball type bearings Adjustment Refer to the procedure in Final Setting Measure and set Bearing End Play as described for you bearing housing configuration in the Assembly section of this manual Refer to th...

Страница 49: ...are not damaged or pre loaded after work is done on the unit Bearing end play must be 0 025 0 035 0 635mm 0 889mm after assembly The only approved method for measuring bearing play in NACD Power Take Off units is by the use of a dial indicator to read actual bearing end play 1 Securely support the unit with the clutch shaft in a vertical position and the output end up Be sure the shaft is clear to...

Страница 50: ... dial indicator to read actual bearing end play 6 If the end play is not in the range listed above select the proper amount of shims to obtain 0 025 0 035 0 635mm 0 889mm end play 7 Place the shims in position between the rear bearing retainer and the rear main bearing Using 6 bolts 65 with lockwashers 103 secure the bearing retainer 64 to the pulley housing Tighten the bolts and torque to 36 43 f...

Страница 51: ... shaft 3 If used loosen the support plate from the base mounting Configuration D only All other configurations skip to step 7 4 Remove hex head capscrews 65 and washers 66 and remove the seal plate 64 from the sheave housing 60 5 Remove the hex head capscrews 48 and remove the sheave housing Bearing 41 will also be removed with the sheave housing 6 Remove the belts All Configurations 7 Attach lift...

Страница 52: ...ered destroyed 4 Remove the two hex head capscrews and remove the instruction plate if they were not previously removed 5 Use a 15 16 wrench to remove the jam nut and lock washer from the hose fitting located on the side of the power take off housing Push the fitting and hose into the power take off housing 6 Straighten the bent portion of the hub nut lock washer Use a 4 wrench or socket to remove...

Страница 53: ...llar assembly 3 Remove the four cotter pins 17 from the four clevis pins 16 securing the sliding sleeve to the links 15 4 Remove the sleeve and collar assembly from the links BRONZE COLLAR DISASSEMBLY 5 Remove two hex huts and two hex head bolts to remove the throwout collar halves and shims from the sliding sleeve BALL BEARING COLLAR DISASSEMBLY 6 If the unit has a grease shield 73 use a large fl...

Страница 54: ...op friction plate 6 and centre plate 7 from the hub and back plate Three plate 18 inch model clutches only 16 Remove the remaining friction plate 6 and centre plate 7 from the hub and back plate REMOVE THE OPERATING SHAFT AND THROWOUT YOKE All SP318AM and SP318SBAM Series 1 Remove the hex head capscrew from the throwout yoke 54 Tap one end of the operating shaft 55 gently to expose one of the wood...

Страница 55: ... is free to rotate There should be a clearance below the input end of the clutch shaft 2 Remove hex head capscrews 48 and washers 49 and remove the support plate if used 3 Lift the clutch shaft 33 and bearing carrier 47 unit from the clutch housing 44 4 Secure the bearing carrier with attached parts in a large vise with protective jaws with the input end of the shaft facing up gripping the rear ca...

Страница 56: ... bearings remove in opposite directions from the shaft shoulder 8 Remove the grease fitting 51 from the bearing carrier 9 Remove two capscrews 74 and bottom plate 62 from the clutch housing 44 CLUTCH SHAFT AND HOUSING DISASSEMBLY CONFIGURATION D Figure 28 Illustration Configuration D 1 Remove the hex hard capscrews and remove the support plate if it was not previously removed 2 Securely support th...

Страница 57: ...e shaft 1 Remove the sheave from the shaft 2 Remove the outer race of bearing 41 from the sheave housing if not previously removed 3 Remove the fitting 50 from the bearing retainer 4 Remove the twelve hex head capscrews 35 and remove the front bearings 38 from the clutch housing 44 5 Lift clutch shaft 33 with the inner races of the front and rear bearings 40 41 from the clutch housing 6 Remove the...

Страница 58: ...Inspect bearing for roughness of rotation Replace the bearing if roughness is found 3 Inspect bearings for corrosion scored scratched cracked pitted or chipped races and for indication of excessive wear of balls or rollers If one of these defects is found replace the bearings Preventing Entrance of Dirt Into Bearings 4 Dirt and grit in bearings are often responsible for bearing failure Consequentl...

Страница 59: ...us cloth replace the part Bore diameters must not exceed the maximum dimension shown in Wear Limits the Description and Specifications section of this manual Figure 29 Inspection the bores threads and faces 7 Inspect bores for wear grooves scratches and dirt Remove burrs and scratches with crocus cloth or a soft stone Replace parts that are deeply grooved or scratched 8 Inspect oil and grease pass...

Страница 60: ...th crocus cloth or a soft stone replace the part 10 Inspect bearing journals on the shaft for grooved burred or galled conditions that would indicate that the bearing has been turning on the shaft If the damage cannot be repaired to like new condition with a crocus cloth replace the part Bearing journal diameters must not be less than the dimensions shown in Wear Limits the Description and Specifi...

Страница 61: ...act surfaces on wear sleeves and other surfaces Look especially for scratches or nicks that intersect with or cross the lip contact area If they cannot be removed using a very fine crocus cloth replace the part 14 Inspect thread openings for damaged threads Chase damaged threads with a tap of the correct size 15 Be sure the snap ring grooves have straight sides especially if a bearing failure has ...

Страница 62: ...s on the capscrews Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section 2 Check collar rotation to be sure it turns freely on the sliding sleeve Proceed at step 8 Ball Bearing Type Throwout Collar 3 Press the ball bearing 30 in the throwout collar 28 Press the bearing to the bottom of the bore Note Pack the bearing wit...

Страница 63: ...ng leading to premature failure 6 Install the external snap ring 29 to secure the bearing on the sliding sleeve 7 Support beneath the collar on the press bed Press the sleeve down until the bearing s inner race is tight against the external snap ring Excessive pressure or sharp impact against the outer race of the bearing during installation of the collar will damage the bearing leading to prematu...

Страница 64: ...and backplate 11 Install a center plate 7 so it rests flat on the friction plate meshing the splines of the center plate and hub and backplate 12 Install a second friction plate 6 on the center plate SP318AM and SP318SBAM Series clutches only 13 Install a second center plate 7 so it rests flat on the second friction plate meshing the splines of the center plate and hub and backplate 14 Install a t...

Страница 65: ...n spring 24 into the pocket in the pressure plate and install the adjusting lock pin 25 on the spring 17 Push down on the pin compressing the spring while screwing the adjusting yoke 26 partially onto the threaded part of the hub and back plate 18 Place the levers 9 between the lugs of the pressure plate and secure to the pressure plate with four clevis pins 11 Note Hook each lever under the edge ...

Страница 66: ...tting 18 in the collar trunnion and attach the flexible hose 19 hose fitting 20 and lubrication fitting 23 Center The Clutch Plates 24 Visually centre the friction plates 6 on the clutch and align the teeth Press down on the collar assembly to lock the plates in place If necessary pull the adjustment lock pin to compress the lock pin spring and rotate the adjusting yoke assembly until the plates a...

Страница 67: ...linois Phone 800 383 9204 815 282 7960 Fax 815 282 9160 www naclutch com 67 67 Figure 38 Align the Plate Stack Proceed to Clutch Shaft and Housing Assembly CLUTCH SHAFT AND HOUSING ASSEMBLY CONFIGURATION C Figure 49 Illustration Configuration C ...

Страница 68: ...ch shaft Use a piece of steel tubing approximately 5cm 2 inches longer than the distance from the end of the shaft to the shoulder and just slightly larger in inside diameter than the bearing s inside diameter The tubing must not be thick enough to contact the cage of the bearing during installation Note an alternative method to install bearings is to heat them in an over at 135 C 275 F for one ho...

Страница 69: ...arrier The lower bearing must seat securely in the bottom of the bore 8 Install bearing retainer 38 in the bearing carrier 47 resting securely against the front bearing 40 9 Install six hex head capscrews 35 with washers 36 Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section Install the bearing carrier unit on the clu...

Страница 70: ...cifications given in Torque Values for Fasteners in the Description and Specifications section 13 Install 2 lubrication fittings 57 if they were removed Proceed to Install the Operating Shaft and Throwout Yoke CLUTCH SHAFT AND HOUSING ASSEMBLY CONFIGURATION D Figure 51 Illustration Configuration D Clutch Shaft 1 Clean the front and rear bearing inner races 40 41 and clutch shaft 33 with isopropyl ...

Страница 71: ...end of the shaft to the shoulder and just slightly larger in inside diameter than the race s inside diameter Note Special tools are not available from NACD but can be fabricated in any capable machine shop Note an alternative method to install bearings is to heat them in an over at 135 C 275 F for one hour and install them immediately on the clutch shaft Let the bearing cool to room temperature af...

Страница 72: ...ilable from NACD but can be fabricated in any capable machine shop Note an alternative method to install bearings is to heat them in an over at 135 C 275 F for one hour and install them immediately on the clutch shaft Let the bearing cool to room temperature after installation Continue to apply force as the bearing cools to room temperature ensuring that remains seated Figure 53 Install the rear b...

Страница 73: ...that contact the bearing Figure 54 Apply grease before assembly 7 Carefully install the outer race of the front bearing 40 in the housing bore 8 Carefully install shaft in the housing Use extra care to prevent damage to the bearing rollers or races during shaft installation Damage will cause premature failure 9 Install the bearing retainer 38 on the housing and secure with six hex head capscrews 3...

Страница 74: ...cations given in Torque Values for Fasteners in the Description and Specifications section 14 Install the outer race of the rear bearing 41 in the sheave housing Tap the race to the bottom of the bore 15 Hand pack the bearing with grease as described in the Description and Specifications section 16 Install the bearing retainer 64 on the sheave housing and secure with three hex head capscrews 65 an...

Страница 75: ... housing far enough to expose one of the woodruff key slots at the centre of the throwout fork 2 Install one woodruff key 56 in the operating shaft Figure 56 Install the throwout fork 3 Push the operating shaft the other way to expose the other key slot in the centre of the fork 4 Install the other woodruff key 56 5 Centre the operating fork so the hex head capscrews will enter the bottom of the t...

Страница 76: ...on the bench with the input side facing up Note The Output end of the shaft must rest securely on a solid surface 2 Carefully place the clutch assembly over the clutch shaft while A Aligning the trunnions on the collar with the throwout fork B Aligning the keyways in the hub and back plate with the keyway in the clutch shaft 3 Partially install the hub key 29 in the keyway Tap the hub and back pla...

Страница 77: ...key 5 Install the hub nut lock washer 3 over the clutch shaft 33 locating its tab in the drilled hole on the hub back plate 4 Install the hub nut 2 and tighten the torque to 40 7 Nm 30 ft lb 6 Tighten the hub nut an additional amount clockwise as shown in the chart below then bend a side of the hub nut lock washer up against a flat on the hub nut Table 19 Hub Nut Advance After Initial Tightening M...

Страница 78: ...omponents on the power take off Center The Clutch Plates 10 If not previously done visual centre the friction plates 6 on the clutch and align the teeth Press down on the collar assembly to lock the plates in place If necessary pull the adjustment lock pin to compress the lock pin spring and rotate the adjusting Yoke assembly until the plates are locked in position when the collar is pressed down ...

Страница 79: ...n bearing cavity with grease or oil according to lubricate specifications in the Maintenance section and Filling the Main Bearing Cavity during initial assembly in the Description and Specifications section of this manual 14 Lubricate the remainder of the PTO according to lubrication specifications in the Description and Specifications section of this manual 15 Place the instruction cover plate 43...

Страница 80: ...7 Install the shaft key 34 and all parts previously removed from the output end of the clutch shaft ILLUSTRATIONS LIST OF ILLUSTRATIONS The following pages include illustrations that are specific to this model The illustrations included are listed below Note Any part numbers listed in the following illustrations are for reference only Please refer to your bill of material for part numbers specific...

Страница 81: ...3 Pin Clevis lever to link 14 Pin Cotter lever to link 15 Link 16 Pin Clevis link to sleeve 17 Pin Cotter link to sleeve 18 Fitting 19 Hose 20 Fitting 21 Washer 22 Nut 23 Fitting Grease 24 Spring Compression 25 Pin 26 Yoke Adjusting 27 Sleeve Sliding 28 Carrier 29 Ring Snap external 30 Bearing Ball 31 Ring Snap internal 32 Key Clutch 33 Shaft Clutch 34 Key output 35 Capscrew Hex head 38 Retainer B...

Страница 82: ...ate Instruction 46 Screw Machine 48 Screw Hex head 50 Fitting 51 Fitting 53 Engagement Handle 54 Release Yoke Assy 55 Shaft Operating 56 Key Woodruff 57 Fitting 60 Pulley Housing 61 Dowel Pin 64 Bearing Retainer 64 Shim 65 Screw Hex head 75 Cover 76 Capscrew 103 Lockwasher PARTS IDENTIFICATION LIST SP318AM and SP318SBAM Series 1 1 1 1 2 6 1 1 1 1 1 2 2 1 1 1 1 6 1 4 6 ...

Страница 83: ... 9204 815 282 7960 Fax 815 282 9160 www naclutch com 83 83 EXPLODED VIEW SERIES CLUTCH EXPLODED VIEW SP318AM and SP318SBAM SERIES CLUTCHES Typical Series Clutch Bronze Throwout Collar Shown Typical SP318AM and SP318SBAM Series Clutch Ball TypeThrowout Collar Shown ...

Страница 84: ...North American Clutch Driveline Rockford Illinois Phone 800 383 9204 815 282 7960 Fax 815 282 9160 www naclutch com 84 EXPLODED VIEW CONFIGURATION C Note Typical unit illustrated ...

Страница 85: ...North American Clutch Driveline Rockford Illinois Phone 800 383 9204 815 282 7960 Fax 815 282 9160 www naclutch com 85 85 EXPLODED VIEW CONFIGURATION D Note Typical unit illustrated ...

Страница 86: ...uipment Only an NACD authorized factory representative shall have authority to assume any cost or expense in the service repair or replacement of any part or product within the warranty period except when such cost or expense is authorized in advance in writing by NACD NACD reserves the right to improve the product through changes in design or materials without being obligated to incorporate such ...

Страница 87: ...lied or otherwise with regard to the information contained within this manual NACD assumes no responsibility for any errors that may appear in this manual and shall not be liable under any circumstances for incidental consequential or punitive damages in connection with or arising out of the use of this manual The information contained within this manual is subject to change without notice ...

Страница 88: ...P O Box 15130 Rockford IL 61132 Phone 800 383 9204 Fax 815 282 9160 www naclutch com ...

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