Caterpillar Cat 641 WHEEL SCRAPER (Prefix 43M) Service Repair Manual Instant Download.pdf

Service Repair Manual
Models
641 WHEEL SCRAPER

Shutdown SIS
Previous Screen
Product: WHEEL SCRAPER
Model: 641 WHEEL SCRAPER 43M
Configuration: 641 SCRAPER 43M00001-UP (MACHINE)
Disassembly and Assembly
641-651-657 TRACTOR POWER TRAIN
Media Number -REG00989-00 Publication Date -01/03/1975 Date Updated -31/07/2012
REG009890009
Differential
SMCS - 3252-12; 3258-16; 3258-11; 3258-15
Remove Differential
1. Turn tractor 90° to scraper.
2. Drain transmission-20 U.S. Gal. (75 liter).
3. Drain differential and final drives-44 U.S. Gal. (166 liter).
4. Remove final drive covers.
5. Pull axles out enough to disengage differential.
6. Disconnect transmission lines (3) and linkage (1).
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https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/siswe...

7. Remove cover (2), gear, and drive shaft (4).
8. Disconnect and support drive shaft tube (5).
9. Remove guard (6) from under hydraulic tank.
10. Connect hoist and support transmission and differential.
11. Remove transmission and differential mounting nuts.
NOTE: Do not remove bolts securing transmission to the differential.
12. Remove transmission and differential as a unit-weight 5,000 lbs. (2258 kg).
13. Support transmission securely.
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14. Attach hoist to differential, remove transmission to differential bolts, and separate differential
from transmission-weight 1,500 lbs. (680 kg).
Install Differential
1. Loosen locknut (7) and turn differential thrust support bolt several turns clockwise.
2. Remove cover (8) from the front side of the differential housing.
3. Position pinion to align splines with transmission.
4. Attach hoist, position differential against transmission, and install mounting bolts.
5. Attach hoist and install transmission and differential onto tractor.
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6. Working through opening on front of differential housing, adjust differential thrust support bolt
to provide .002 ± .001 in. (0,05 ± 0,025 mm) clearance between head of bolt and carrier bearing
cap. Tighten locknut and install cover.
7. Install hydraulic tank guard (6).
8. Connect drive shaft tube (5).
9. Install drive shaft (4), gear, and cover (2).
10. Connect lines (3) and linkage (1).
11. Install axles and final drive covers.
12. Fill transmission, differential, and final drives to specified level.
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Disassemble Differential
preparatory step:
a) remove transmission and differential
1. Remove differential lock (1) and air line-weight 108 lbs. (49 kg).
2. Remove cover (2) from differential lock housing.
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3. Remove springs, retaining ring, and jaw (3).
4. Remove piston (4).
5. Remove differential carrier bearing caps and adjusting rings.
6. Remove inner jaw locating bolt (5) and jaw.
7. Attach hoist.
8. Remove bearing retainers and move carrier assembly over to clear pinion, and up-weight 500
lbs. (227 kg).
9. Position carrier, ring gear-teeth up, remove nuts from differential case bolts, and separate
differential case.
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10. Remove side gears (6) and differential pinion gears (7). Mark ring gear (8) location with
respect to differential.
11. Turn assembly over and remove ring gear retaining bolts. Allow ring gear to drop, and remove
case-weight 100 lbs. (45 kg). Ring gear-weight 175 lbs. (79 kg).
12. Remove carrier bearings using tool (A).
13. Position differential housing, input end up.
14. Remove pinion bearing retainer, using 1/2" - 13 NC forcing screws.
15. Remove pinion (9).
16. Remove seal ring (10) from pinion.
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17. Remove pinion bearings using tool (B).
Assemble Differential
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1. Heat bearing cones in 275°F (135°C) oil and install on carrier and pinion.
2. Install sealing ring on pinion.
3. Do not install seal in pinion bearing retainer at this time.
4. Install pinion in housing.
5. Install bearing retainer using enough shims to provide 20 ± 5 lb. in. (23,0 ± 5,8 cm. kg.) turning
resistance preload, tool (A).
NOTE: It is necessary to remove the retainer and install the seal after the preload adjustment is
made.
6. Install side gears and differential pinion gears in differential case. Position thrust washers so
that the notches align with the locating pins. Tighten case retaining bolts to 280 ± 20 lb. ft. (38,7 ±
2,8 mkg).
7. Install ring gear and tighten retaining bolts to 276 ± 35 lb. ft. (36,6 ± 4,6 mkg).
8. Position differential carrier output end up.
9. Install differential case assembly. Holes in carrier bearing retainers must align with dowels in
caps.
10. Position differential housing so that axle center line is vertical and the ring gear teeth up.
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11. Install bolt (1) to lock the ring gear.
12. Install bracket, puller, and indicator, tool (B) on the pinion.
13. Adjust backlash to .014 ± .002 in. (0,35 ± 0,08 mm).
14. Position differential ring gear side down, install dial indicator, tool (C) and tighten adjusting
nut to preload carrier bearing .007 ± .002 in. (0,18 ± 0,36 mm). Check backlash again and adjust if
required.
15. Lock carrier bearing adjusting rings.
16. Install piston in differential lock housing.
17. Install jaw and snap ring.
18. Assemble housing.
19. Install inner jaw and locating bolts.
20. Install differential lock assembly.
21. Lockwire bolts and nuts as required.
concluding step:
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a) install differential and transmission
Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Thu Mar 4 22:41:23 UTC+0800 2021
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Shutdown SIS
Previous Screen
REG009890010
Engine Transfer Gear And Retarder
SMCS - 3175-15; 3175-16
Disassemble Engine Transfer Gear And Retarder
preparatory step:
a) remove engine
1. Remove pumps:
Implement-weight 175 lbs. (79 kg).
Steering-weight 275 lbs. (125 kg)
Transfer gear scavenge pump.
2. Remove retarder control valve.
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3. Attach hoist and remove transfer gear assembly using two 1/2"-13 NC forcing screws and a
5/8"-11 NC forged eyebolt.
4. Place transfer gear, input end down.
5. Remove two bearing cages (pump mounts) using 1/2"-13 NC forcing screws.
6. Remove output flange.
7. Remove output bearing retainer.
8. Remove gears (1), (2) and (3).
9. Remove bearings from pump drive gears using tool (A).
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NOTE: Output gear bearings must be cut off if replacement is necessary.
10. Turn transfer gear over and remove input gear (4).
11. Separate retarder housing (5).
12. Remove rotor.
13. Remove remainder of retarder housing (6) using 3/8"-16NC forged eyebolts-weight 135 lbs.
(61 kg).
14. Remove input shaft (7) and gear. Bearings must be cut from gear if replacement is necessary.
15. Use tool (B) to remove input bearing cup.
16. Drive all other bearing cups out of housing using a soft punch.
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Assemble Engine Transfer Gear And Retarder
1. Heat bearing cones in 275°F (135°C) oil and install on gears.
NOTE: Lubricate the bearing cones after they have cooled.
2. Install bearing cups in housing and retainer.
3. Install input gear shaft, and bearings in housing.
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4. Install half of retarder housing with enough shims to produce measurable input shaft end play.
5. Using dial indicator, tool (A), measure end play, and add or remove shims to produce .005-.011
in. (0,13-0,28 mm) end play.
6. Tighten retarder to housing bolts to 90 ± 10 lb. ft. (12,5 ± 1,4 mkg).
7. Install retarder rotor.
8. Install the other half of retarder housing.
9. Install flywheel input gear. Turn transfer gear over.
10. Install oil tubes.
11. Install pump drive gears.
12. Install bearing retainers using enough shims to establish measurable end play. Measure end
play with dial indicator, tool (A).
13. Add or remove shims as required to produce .005-.011 in. (0,13-0,28 mm) end play.
14. Install output drive gear and adjust end play to .005-.011 in. (0,13-0,28 mm).
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15. Connect transfer gear assembly to engine.
16. Install retarder control valve.
17. Install pumps.
concluding step:
a) install engine and transfer gear
Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Thu Mar 4 22:42:19 UTC+0800 2021
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Shutdown SIS
Previous Screen
REG009890011
Transmission Transfer Gear
SMCS - 3159-15; 3159-16
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Disassemble Transmission Transfer Gear
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preparatory step:
a) remove transmission
1. Remove transfer gear from transmission.
2. Install forcing screws and remove drive gear bearing cage (1) and gear.
3. Remove bearing race from bearing cage with punch and hammer.
4. Remove bearing race from case using tool (A).
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5. Remove bearing from drive gear using tool (B).
6. Remove oil screen and magnetic strainer.
7. Remove scavenge oil pump.
8. Install forcing screw and remove manifold assembly and oil pump.
9. Rotate oil pump drive gear. Align holes (2) in gear with bolts. Remove bolts (3).
10. Rotate gear to forcing screw holes. Install forcing screws and remove gear and bearings.
Remove gear through transmission drive gear hole.
11. Remove inner bearing race retaining ring and remove bearing and bearing cage (4).
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12. Remove governor housing and governor.
13. Remove governor drive gear (6) and fiber washers (7).
14. Remove input gear bearing cage (5).
15. Remove bearing race from cage using tool (C).
16. Remove bearings from input gear using tool (D).
17. Remove idler shaft retaining bolts, install 3/8"-16 NC forcing screws and remove idler shaft.
18. Remove idler gear and bearings.
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19. Drive race out of idler gear with punch and hammer. Do not drive against spacer (8).
20. Remove spacer and retaining ring, and drive second race and spacer out with tool (E).
21. Remove retaining ring.
Assemble Transmission Transfer Gear
1. Install retaining ring (3) into idler gear (2).
NOTE: Retaining ring IS NOT centered in gear bore.
2. Install spacer (4) from side with greatest length to retaining ring.
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NOTE: Install spacer with shoulder through retaining ring.
3. Drive bearing races (1) and (5) into gear with tool (A).
4. Install gear and bearings into case.
5. Install shaft, O-ring, and retaining bolts.
6. Install input gear bearing races into case and cage using tool (B).
7. Heat input gear bearing to 275° F (135° C) and install on input gear.
8. Install input gear, bearing cage, shim pack, and O-ring into case. Tighten retaining bolts to 36 ±
2 lb. ft. (5,0 ± 0,3 mkg).
9. Measure bearing end play using tool (C).
10. Add or remove shims to obtain .006 ± .002 in. (0,15 ± 0,05 mm) end play.
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Caterpillar Cat 641 WHEEL SCRAPER (Prefix 43M) Service Repair Manual Instant Download.pdf

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Caterpillar Cat 641 WHEEL SCRAPER (Prefix 43M) Service Repair Manual Instant Download.pdf