LOFTNESS 61G4 Series Owner'S Manual And Parts Book Download Page 1

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Model Number:

Serial Number:

Date of Purchase:

N38517 (61" Double Carbide)
N38518 (61" Quadco)
N101958 (61" Double Carbide)
N101960 (61" Quadco)
N38440 (71" Double Carbide)
N38516 (71" Quadco)

Carbide Cutter

61G4 • 71G4

Owner’s Manual and Parts Book

(Originating w/Serial Number 42-1666)

N38489 Rev. F

07.23.18

Summary of Contents for 61G4 Series

Page 1: ...se N38517 61 Double Carbide N38518 61 Quadco N101958 61 Double Carbide N101960 61 Quadco N38440 71 Double Carbide N38516 71 Quadco Carbide Cutter 61G4 71G4 Owner s Manual and Parts Book Originating w Serial Number 42 1666 N38489 Rev F 07 23 18 ...

Page 2: ......

Page 3: ...up Instructions Pusher Bar Assembly 11 Installing the Carbide Cutter to the Loader 12 Checking Rotor Rotation 13 Checking Rotor Speed 13 Skid Adjustment 14 Cutter Bar Adjustment 14 Operating Instructions Getting Started 15 Operation 15 Log Moving 16 Hydraulic Hose Storage 16 Maintenance General Maintenance 17 Maintenance Schedule 17 Lubrication 18 Grease Point Location 18 Overhung Load Adapter 19 ...

Page 4: ...Hydraulics Cont d 34 Valve Open Loop CW N21669 36 Hydraulic Motor Variable 80cc to 110cc N38488 37 Overhung Load Adapter N51193 38 Rotor w Double Carbide Teeth 61 N38536 71 N47831 39 Rotor W Quadco Planer Teeth 61 N78331 71 N38522 40 Tooth Assembly Quadco Planer N24281 41 Rear Cutter Bar 61 N20281 71 N21908 42 Manual Holder 43 Machine Decals and Signs 44 Appendix Specifications 47 Dimensions 48 To...

Page 5: ...d maintain this machine in a safe manner and in accordance with all applicable local state and federal codes regulations and or laws and in compliance with on product labeling and these instructions Make sure that all personnel have read this owner s manual and thoroughly understand safe and correct operating installation and maintenance procedures Continuous improvement and advancement of Loftnes...

Page 6: ...7 In 43 cm Diameter Rotor 1600 2200 RPM 2 3 16 In 56 mm Rotor Bearings Anti Wrap Bearing Protection Heavy Duty Bearing Block Variable Displacement Piston Type Motor Dual Cross Over Relief Protection Pressure Gauge Steel Chain Deflectors Synchronous Belt Tapered Lock Sheaves Skid Shoes Adjustable 5 in to 1 5 in 12 7 to 38 1 mm Hydraulic Hoses and Hose Holder Adjustable Shear Bar DoubleCarbideorQuad...

Page 7: ... Loftness for safety decal replacement Loftness cannot anticipate every possible circumstance that may involve a potential hazard The warnings in this owner s manual are not all inclusive Owner s Responsibility Duetothepotentialdangerofflyingdebris itistheowner s responsibility and is ABSOLUTELY MANDATORY that IMPACT RESISTANT SHIELDING be installed on the machine to protect the operator It is ABS...

Page 8: ...and step plates when getting on and off the machine to prevent falls Keep steps and platform cleared of mud and debris Always have an operator in the machine while the attachment is in operation Never leave the machine and attachment running and unattended Operate the attachment only from the operator s seat Keep your feet on the pedals floor plates seat belt fastened snuggly and seat bar lowered ...

Page 9: ...ly check all guards shields and structural members Replace or repair anything that could cause a potential hazard Do not replace components or parts with other than factory recommended service parts To do so may decrease the effectiveness of the machine It is the operator s responsibility to be aware of machine and attachment operation and work area hazards at all times Never operate the attachmen...

Page 10: ...6 Carbide Cutter OM Safety Instructions Carbide Cutter Identification ...

Page 11: ...art No N28384 1 3 Part No N17013 Part No N20661 4 Part No N68724 Part No 200491 DANGER ALWAYS OPERATE CUTTER HEAD AS LOW AS POSSIBLE LIFTING OR TILTING BACK INCREASES THE RISK FROM FLYING DEBRIS N68724 2 Part No N68716 WARNING Rotating parts hazard Can cause serious injuries or death Do not operate machine without shields attached N68716 6 4 1 2 3 5 6 ...

Page 12: ...o N28386 Safety Instructions Part No N28385 Part No N23506 WARNING SKIN PUNCTURE HAZARD HYDRAULIC LINES Protect hands and body from high pressure fluids N23506 Part No 4334 Safety Decal Locations Cont d 9 8 10 7 7 7 9 9 9 9 10 8 ...

Page 13: ...Instructions Part No N29769 Part No N17014 Part No N68716 WARNING Rotating parts hazard Can cause serious injuries or death Do not operate machine without shields attached N68716 Safety Decal Locations Cont d 12 11 12 11 12 13 13 ...

Page 14: ...10 Carbide Cutter OM ...

Page 15: ...epeat procedure on other side Raise or lower the pusher bar and align the rear arm 4 with the desired hole A B or C on the pusher bar side assembly Reinstall all hardware and tighten 1 2 and 6 securely This must be done on both sides Set up Instructions Pusher Bar Assembly 2 1 3 4 NOTE Assembling the pusher bar requires two people or the use of an approved lifting device to support the push bar as...

Page 16: ...ust be connected to the loader s auxiliary hydraulic system for proper operation of the carbide cutter Installing the Carbide Cutter to the Loader Remove the two safety bolts 1 Fully raise the attachment locking levers on the loader mounting plate 1 Tilt the loader mounting plate ahead Drive forward with the loader and hook the top edge of the loader mounting plate under the top flange 1 on the ca...

Page 17: ... on the loader and test for correct rotor rotation Checking Rotor Speed 1 2 Remove right side belt cover Apply a small piece of reflective tape 1 to the outer edge of the lower sheave Point an electronic photo tachometer 2 towards the edge of the sheave to check the rotor speed NOTE The tachometer shown is not supplied with the carbide cutter Test the rotor RPM with loader engine at full throttle ...

Page 18: ...her forward or back making sure the distance moved is consistent through the entire length of the cutter bar Retighten bolts To move the cutter bar a greater distance remove the bolts washer and bar and reposition into the next row of bolt holes 3 Set up Instructions Skid Adjustment 1 1 NOTE The skid s can be adjusted to increase or decrease the distance between the ground and the rotor Remove the...

Page 19: ...ower the carbide cutter until the skids contact the ground Engage the auxiliary hydraulics Move the loader and carbide cutter forward and begin mowing NOTE Various mowing conditions and desired finished cut appearance will determine proper ground speed Operating Instructions WARNING Due to the potential danger of flying debris it is the owner s responsibility and is ABSOLUTELY MANDATORY that IMPAC...

Page 20: ...tter forward until the push bar extensions are over the log or item being moved Lower the lift arms and position the log between push bar extensions and the carbide cutter Move the loader backwards dragging the log to the desired location Hydraulic Hose Storage When not in use protect the hose couplers by securing the hydraulic hoses in the storage position on the left side pusher arm ...

Page 21: ...tter after each use Proper lubrication is important Too little lubricant will cause premature failure of a bearing Too much lubrication usually causes high operating temperature and early failure of seals Follow all lubrication instructions and schedules included in this section Maintenance Schedule H O U R S SERVICE POINTS SERVICE REQUIRED C H E C K C L E A N C H A N G E G R E A S E A D J U S T O...

Page 22: ...18 Carbide Cutter OM Lubrication Grease Point Location Maintenance 2 Rotor Bearing left 1 Rotor Bearing right shown with manual cover removed ...

Page 23: ...f the right side belt drive cover below the manual holder Refer to item 2 on page 18 NOTE Rotor bearings cannot be damaged by over greasing Grease fittings until a small amount of grease is purged from the bearing Interval Daily or every 8 hours of operation Overhung Load Adapter Cover must be removed to access the overhung load adapter Refer to Removing Motor Cover on page 20 for instructions 1 2...

Page 24: ...olts 1 on the front of the motor cover 2 followed by the two bolts 3 at the rear 1 Carefully lift the cover off of the frame being cautious not to pinch or damage the pressure gauge hose 1 under the motor cover Belt Adjustment Remove belt cover and motor cover following the instructions earlier on this page 1 1 2 Loosen the four bolts 1 Loosen the overhung load adapter support bracket bolts 2 Proc...

Page 25: ...ooth 1 2 When reinstalling bolts tighten this bolt first Remove the two bolts 1 and tooth 2 Use copper based anti seize when reinstalling the bolts Torque to 137 ft lbs IMPORTANT Tighten the bolt on the top edge of the tooth first when reinstalling Quadco Teeth When reinstalling bolts tighten this bolt first 1 2 Remove the two bolts 1 and tooth 2 Use copper based anti seize when reinstalling the b...

Page 26: ...ot hold it s cutting edge NOTE When re sharpening teeth using machine shop equipment avoid overheating the teeth by using a flood coolant system NOTE When re sharpening teeth using a hand grinder avoid overheating the tooth by lightly grinding each tooth moving across the entire row of teeth before returning to the first tooth to repeat the procedure NOTE Sharpen each tooth equally to maintain rot...

Page 27: ...anual Secure hydraulic hoses in storage position See Hydraulic Hose Storage on page 16 Beginning of the Season Review the carbide cutter operator s manual Lubricate all parts of the machine See Lubrication on page 18 Tighten all bolts nuts and set screws See Torque Specifications on page 49 Adjust belt tension See Removing Belt Cover on page 20 Replace all damaged worn or missing decals Install th...

Page 28: ... or actual rotor deformity from striking rocks etc Consult factory Uneven Cutting Teeth dull or worn excessively Replace teeth Engine RPM too slow Adjust machine RPM to full throttle Travel speed too fast Reduce ground speed Rotor Will Not Turn Faulty drive line bearing Replace bearing s Faulty rotor bearing Replace bearing s Belt damaged Replace belt Belt slipping Clean or replace belt Adjust ten...

Page 29: ...25 Carbide Cutter OM PARTS IDENTIFICATION Parts Identification ...

Page 30: ... 4 5 4 3 6 7 2 3 2 9 10 11 12 13 2 14 15 17 18 16 3 4 16 3 4 20 21 2 22 2 6 7 12 23 30 28 29 28 29 19 8 A B 24 25 A B 14 26 10 14 26 27 Parts Identification Carbide Cutter Body Assembly Parts breakdown of item 5 N70772 is on page 31 ...

Page 31: ...15 13 1 N49680 COVER WELDMENT BELT BOTTOM 14 7 N37780 WASHER NORD LOCK 1 2 SP 15 4 4012 BOLT 1 2 X 1 1 4 GRADE 5 16 2 4375 PIN ROLL 3 16 X 1 17 1 N20102 ROD CARBIDE 61 CHAIN 1 N20166 ROD CARBIDE 71 CHAIN 18 66 N15589 CHAIN CARBIDE AX REAR 61 76 N15589 CHAIN CARBIDE AX REAR 71 19 1 N67045 TUBE PUSHER SHORT W BUSHING 20 4 N26748 BOLT 1 2 X 1 SER FLG 21 1 N68396 COVER HOSE W DECALS 22 1 N67081 TUBE P...

Page 32: ...M Parts Identification Carbide Cutter Body Assembly Cont d 4 3 4 1 2 3 5 6 7 A B B A 9 10 11 12 13 15 16 14 6 8 8 35 36 33 32 30 29 27 25 26 28 31 34 37 Same as items 29 thru 35 on opposite end 23 22 21 18 17 19 20 16 24 ...

Page 33: ... 1 8 NPT 20 1 4304 10 BULKHEAD FITTING GREASE HOSE 21 1 4304 HOSE GREASE 1 8 X 15 22 1 N25125 ELBOW 90 DEG 4FJIC 4MJIC 23 1 N65479 COVER NON DRIVEN 24 1 4472 ELBOW 1 8 90 DEG STREET 25 1 4468 SCREW 1 2 x 20UNF x 1 1 4 FN TD FL HD CAP 26 1 4076 WASHER 1 2 EXT CNTSK LOCK 27 1 4085 PIN ROLL 3 16 x 3 4 28 1 4075 WASHER 2 5 8 OD BEARING RETAINER 29 8 N20043 BOLT 1 2 x 2 1 4 FN TD GR 8 30 8 N16472 WASHE...

Page 34: ... 1 N20805 BUSHING 1 1 2 TPL 3020 4 1 7121 03 KEY 3 8 X 2 5 1 N18975 BUSHING 2 3 16 TPL 3020 6 1 7122 04 KEY 1 2 X 2 7 1 N34646 BELT POLY CHAIN 14MM 1568 X 3 8 1 N38491 SPROCKET 14MM 40 TOOTH 37 Used for model numbers N101958 and N101960 9 1 N38492 SPROCKET 14MM 48 TOOTH 37 Used for model numbers N101958 and N101960 Parts Identification 9 8 3 5 4 6 7 3 5 4 6 7 2 1 For model numbers N38517 N38518 N3...

Page 35: ... PSI 4 PRESS 3 3 N16132 BOLT BHCS 8 32 x 1 4 3 N16133 NUT NYLON INSERT 8 5 1 N16332 FLANGE MOUNT GAUGE 6 1 N16331 FLANGE MOUNT GAUGE 8 7 1 N16335 FLANGE MOUNT 10 8 3 N16334 NUT NYLON INSERT 10 9 3 N16133 NUT NYLON INSERT 8 Motor Shield w Gauge N70770 1 2 3 4 9 8 7 6 5 Parts Identification ...

Page 36: ...cs C C 1 2 6 7 3 9 24 4 11 20 45 44 10 12 14 15 13 5 37 33 34 32 30 31 30 17 29 28 27 25 Pressure 26 25 Tank 35 36 38 41 43 42 39 40 8 17 17 19 18 A A 20 21 22 23 24 46 B B 16 Pressure Pressure Tank Tank Parts breakdown of item 26 N21669 is on page 36 ...

Page 37: ...R 16FJC 6MJC 14 1 N19270 ELBOW 90 DEG 16MJC 16FJC 15 1 N16166 HOSE 3 8 X 24 6FJX 8MOR 16 2 N90323 HOSE 1 64 16FJIC 16 90CD62 17 1 N38498 HOSE 1 4 100 6FJIC 4FPSWIVL 18 1 N16162 ELBOW 1 4 BLK 90 DEG STREET 19 1 N16163 GAUGE 0 6000PSI 4 PRESS 20 1 N38500 HOSE 1 2 80 8FJIC 8FJIC 21 1 N11953 TEE 8MJIC 8MOR 8MJIC 22 1 N38505 VALVE RELIEF 65PSI 23 1 N38520 ADAPTER 90 4MJIC 8MORB 24 4 N20288 KIT SPLIT FL...

Page 38: ...Cont d Parts breakdown of item 26 N21669 is on page 36 C C 1 2 6 7 3 9 24 4 11 20 45 44 10 12 14 15 13 5 37 33 34 32 30 31 30 17 29 28 27 25 Pressure 26 25 Tank 35 36 38 41 43 42 39 40 8 17 17 19 18 A A 20 21 22 23 24 46 B B 16 Pressure Pressure Tank Tank ...

Page 39: ...N38518 N38440 and N38516 1 N34615 COUPLER 1 2 MALE FLAT 12FORB Used for model numbers N101958 and N101960 35 1 N28248 COUPLER 3 8 MALE FLAT 8FORB 36 1 N38499 HOSE 1 2 94 8FJIC 8MORB 37 4 4237 NUT 5 16 STANDARD 38 4 4460 WASHER 1 4 SAE FLAT 39 7 4195 BOLT 3 8 X 1 GRADE 5 40 2 N16470 WASHER 3 8 NORDLOCK 41 1 N16124 MOUNT ACCUMULATOR 42 1 N87003 ACCUMULATOR 5000PSI 100PSI PC 43 2 N16125 U BOLT 5 16 X...

Page 40: ... number N38181 for seal kit for items 1a and 1d Use item 3 in parts list part number N14170 for seal kit for items 1b and 1c Valve Open Loop CW N21669 QTY PART DESCRIPTION 1a 1 N28100 RELIEF LOW PRESSURE 1000PSI 1b 1 N28102 VALVE CHECK PILOT OPERATED 1c 1 N28103 VALVE COUNTERBALANCE 1d 1 N28099 RELIEF HIGH PRESSURE 5000PSI 2 1 N38181 KIT SEAL CART SUN RDFA LCN 3 1 N14170 KIT COUNTER BALANCE SEAL ...

Page 41: ...8 QTY PART DESCRIPTION 1 N28376 SEAL KIT Includes Items 1 2 3 and 4 1 1 O RING 194 1 X 3 V80 220 X 3 V80 2 1 O RING 144 5 X 3 V70 168 x 3 V70 3 1 SHAFT SEAL 60 X 80 X 6 4 1 O RING 114 5 X 3 V80 1 2 3 4 NOTE Other items included in kit should only be replaced by authorized service center ...

Page 42: ... 1 N14118 PLUG 6 BOSS 4 2 N16578 PLUG 4 BOSS 5 2 N34130 BEARING CUP 6 2 N34131 BEARING CONE 7 1 N A SHAFT 915 13S 8 1 N38542 REAR SEAL 9 1 N38541 WAVE SPRING SSB 0433 10 1 N38543 O RING 2 248 11 1 N A REAR ADAPTER PLATE 12 6 N28529 SCREW SHCS 0 500 13 X 1 25 LG 1 2 3 5 6 4 4 7 6 5 9 8 10 11 12 Parts Identification ...

Page 43: ...UTTERS 1 N47832 ROTOR 71 CARBIDE SPIRAL W O CUTTERS 2 36 N15510 TOOTH DOUBLE CARBIDE 61 42 N15510 TOOTH DOUBLE CARBIDE 71 3 72 N17041 WASHER LOCK 5 8 61 84 N17041 WASHER LOCK 5 8 71 4 72 N15646 SCREW 5 8 18UNF x 2 1 2 GR 8 61 84 N15646 SCREW 5 8 18UNF x 2 1 2 GR 8 71 1 2 3 4 Use copper based anti seize Torque to 137 ft lbs Tighten top bolt Item 4 first ...

Page 44: ...R 61 42 N24279 TOOTH QUADCO PLANER 71 3 36 N24139 HOLDER TOOTH QUADCO PLANER 61 42 N24139 HOLDER TOOTH QUADCO PLANER 71 4 72 N17041 WASHER LOCK 5 8 61 84 N17041 WASHER LOCK 5 8 71 5 36 N26490 SCREW 5 8 18UNF x 3 1 4 GR 8 61 42 N26490 SCREW 5 8 18UNF x 3 1 4 GR 8 71 6 36 N17036 SCREW 5 8 18UNF x 2 GR 8 61 42 N17036 SCREW 5 8 18UNF x 2 GR 8 71 1 3 2 4 5 6 Use copper based anti seize Torque to 137 ft...

Page 45: ...n Tooth Assembly Quadco Planer N24281 1 2 3 4 5 3 QTY PART DESCRIPTION 1 1 N24279 TOOTH QUADCO PLANER 2 1 N24139 HOLDER TOOTH QUADCO PLANER 3 2 N17041 WASHER LOCK 5 8 4 1 N26490 SCREW SHCS 5 8 18UNF X 3 1 4 5 1 N17036 SCREW SHCS 5 8 18UNF X 2 ...

Page 46: ... DESCRIPTION 1 1 N38534 PLATE 61 CARBIDE CUTTER 1 N41754 PLATE 71 CARBIDE CUTTER 2 7 4062 WASHER 2 OD X 11 16 ID X 1 4 T 61 7 4062 WASHER 2 OD X 11 16 ID X 1 4 T 71 3 7 4042 BOLT 5 8 x 2 FINE THRD GR 8 61 7 4042 BOLT 5 8 x 2 FINE THRD GR 8 71 1 2 3 NOTE Underside of carbide cutter shown ...

Page 47: ...43 Carbide Cutter OM Parts Identification Manual Holder QTY PART DESCRIPTION 1 1 N38489 OPERATORS MANUAL 2 3 4000 BOLT 1 4 X 1 GRADE 5 3 3 4050 NUT 1 4 LOCK 4 1 N19600 HOLDER 01 315A STND MANUAL 1 2 3 4 ...

Page 48: ...r location on the machine See Safety Decal Locations on page 7 Check and replace any worn torn hard to read or missing decals on your machine Part No N17013 Part No N20661 Part No N17014 Part No 4334 Part No N28385 Part No N28386 Part No N68716 WARNING Rotating parts hazard Can cause serious injuries or death Do not operate machine without shields attached N68716 ...

Page 49: ...Part No N28384 Part No N13721 Part No 4138 S EAL OF QUALIT Y FEMA F A R M E Q U I P M ENT MANUFACTURERS A S S O C I A T I O N Part No N13517 DANGER ALWAYS OPERATE CUTTER HEAD AS LOW AS POSSIBLE LIFTING OR TILTING BACK INCREASES THE RISK FROM FLYING DEBRIS N68724 Part No N24823 Part No N24822 Part No N33105 Part No 200491 ...

Page 50: ...46 Carbide Cutter OM ...

Page 51: ...placement Rotor Bearing 2 1875 in Piloted Double Taper Rotor Tip Diameter 17 in 43 2 cm Sheaves Taperlock Belt 14 mm x 37 Synchronous Mount Universal Skid Type Shear Bar Adjustable Pusher Bar Adjustable Rigid Bar Knives Double Carbide Teeth Quadco Planer Teeth Sharpenable Optional Skid Shoes Adjustable 5 in 1 3 cm Above Grade to 1 5 in 3 8 cm Below Grade Deflector Steel Chain Anti Wrap Protection ...

Page 52: ... in 155 cm 71 in 180 3 cm Overall Width B 76 2 in 193 5 cm 86 2 in 220 cm Operating Height C 37 71 in 95 8 cm 37 71 in 95 8 cm Overall Length D 37 09 in 94 2 cm 37 09 in 94 2 cm Number Of Knives 36 42 Weight 2453 lb 1113 kg 2688 lb 1219 kg Crated Weight 2700 lb 1225 kg 2915 lb 1322 kg D C A B ...

Page 53: ... ft lb 26 N m 26 ft lb 35 N m 7 16 27 ft lb 37 N m 35 ft lb 47 N m 42 ft lb 57 N m 54 ft lb 73 N m 59 ft lb 80 N m 77 ft lb 104 N m 30 ft lb 41 N m 42 ft lb 57 N m 1 2 42 ft lb 57 N m 54 ft lb 73 N m 64 ft lb 87 N m 83 ft lb 113 N m 91 ft lb 123 N m 117 ft lb 159 N m 45 ft lb 61 N m 64 ft lb 88 N m 9 16 60 ft lb 81 N m 77 ft lb 104 N m 92 ft lb 125 N m 120 ft lb 163 N m 130 ft lb 176 N m 169 ft lb...

Page 54: ...m 115 in lb 17 N m 150 in lb 6 3 N m 56 in lb M8 14 N m 124 in lb 18 N m 159 in lb 22 N m 195 in lb 28 N m 248 in lb 31 N m 274 in lb 40 N m 354 in lb 15 N m 133 in lb M10 28 N m 21 ft lb 36 N m 27 ft lb 43 N m 32 ft lb 56 N m 41 ft lb 61 N m 45 ft lb 79 N m 58 ft lb 30 N m 22 ft lb M12 49 N m 36 ft lb 63 N m 46 ft lb 75 N m 55 ft lb 97 N m 72 ft lb 107 N m 79 ft lb 138 N m 102 ft lb 53 N m 39 ft ...

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Page 56: ...www loftness com Loftness Specialized Equipment Inc 650 So Main Street PO Box 337 Hector MN 55342 Tel 320 848 6266 Fax 320 848 6269 Toll Free 1 800 828 7624 Printed in USA Loftness 2018 ...

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