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4S5844 COUPLING GROUP Serial No. 23H1 to 718, 724 to 768, 778 to 785, 797, 803 to 819, 821, 823, 826 to 829, 831, 832, 835 to 841 & 23H843 to 23H870 inclusive. Part of Drive Shaft shown on Page 88 621


POWER TRAIN
SHAFT GP
TRANSMISSION GP
GEAR GP

WHEEL TRACTOR 621 WHEEL TRACTOR 23H
 621 TRACTOR 23H00001-02222 (MACHINE) UE070042 621 23H   (1966)

POWER TRAIN

SHAFT GP
DRIVE SHAFT
DRIVE SHAFT
DRIVE SHAFT GUARD
DRIVE SHAFT GUARD
DRIVE SHAFT GUARD
DRIVE SHAFT GUARD
COUPLING GROUP
4S-5844 COUPLING GROUP
COUPLING GROUP
4S-5844 COUPLING GROUP
 

#UE0700420150
 

4S-5844: COUPLING GROUP

4S5844 COUPLING GROUP
Serial No. 23H1 to 718, 724 to 768, 778 to 785, 797, 803 to 819, 821, 823, 826
to 829, 831, 832, 835 to 841 & 23H843 to 23H870 inclusive. Part of Drive Shaft
shown on Page 88
c78936 UE070042
4S5844 COUPLING GROUP Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4S-5992 [6] CYLINDER  
2. 4S-5991 [2] BEARING  
3. 4S-5988 [1] BODY  
4. 4B-4098 [1] PLUG  
5. 4S-5987 [1] BODY  
6. 1A-2029 [3] BOLT  
  3B-4506 [3] LOCKWASHER  
7. 1A-1135 [1] BOLT  
8. 4S-5848 [1] FLANGE  
9. 4S-5993 [1] PLATE  
 

#UE0700420151
 

4S-5844: COUPLING GROUP

4S5844 COUPLING GROUP
Serial No. 23H719 to 723, 769 to 777, 786 to 796, 798 to 802, 820, 822, 824,
825, 830, 833, 834, 842 & 23H871-Up. Part of Drive Shaft shown on Page 88
c121654 UE070042
4S5844 COUPLING GROUP Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4S-5992 [6] CYLINDER  
2. 4S-5991 [2] BEARING  
3. 7S-4500 [1] BODY  
4. 4B-4098 [1] PLUG  
5. 4S-5987 [1] BODY  
6. 1A-2029 [3] BOLT  
  3B-4506 [3] LOCKWASHER  
7. 1D-4609 [1] BOLT  
8. 2S-0115 [1] WASHER  
9. 7S-4499 [1] FLANGE  
10. 4S-5993 [1] PLATE  
 

#UE0700420152
 

3S-0148: TRANSMISSION ARRANGEMENT

3S148 TRANSMISSION ARRANGEMENT
AS VIEWED FROM RIGHT HAND SIDE OF MACHINE
Serial No.
23H1 23H217 23H257 23H272 23H282 23H295 23H315 23H325
to 23H218 23H258 23H273 23H283 23H296 23H316 23H326
23H202 23H222 23H259 23H274 23H284 23H297 23H317 23H327
23H204 23H227 23H260 23H275 23H285 23H298 23H318 23H328
23H205 23H232 23H261 23H276 23H286 23H301 23H319 23H329
23H207 23H234 23H263 23H277 23H287 23H302 23H320 23H330
23H208 23H235 23H265 23H278 23H288 23H305 23H321 23H338
23H209 23H252 23H266 23H279 23H292 23H312 23H322 23H351
23H210 23H255 23H267 23H280 23H293 23H313 23H323 23H355
23H211 23H256 23H268 23H281 23H294 23H314 23H324 23H356
Transfer Gear parts are shown on Page 91, 1T690 Hydraulic Torque Converter Assembly Pages
92 and 92A, Manifold and Screen Page 93, Planetary Transmission Pages 94 through 97D,
Transmission Hydraulic Control Pages 100 and 101, 2S6457 Transmission Filter Page 103,
2S5842 Transmission Pump Page 103 and 2S5843 Scavenge Pump Page 105. NOTE: SERIAL
NOS. BETWEEN 23H1 AND 23H356 NOT LISTED ABOVE ARE SHOWN ON PAGE 90A
c79142 UE070042
3S0148 TRANSMISSION ARRANGEMENT Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. [1] MANIFOLD AND SCREEN  
2. 2S-5843 [1] PUMP GROUP (Scavenge)  
3. 2S-5842 [1] PUMP GROUP (Transmission)  
4. 1T-0690 [1] CONVERTER ASSEM.  
5. [1] TRANSFER GEAR  
6. [1] CONTROL GROUP  
7. [1] PLANETARY TRANSMISSION  
8. 2S-6457 Y [1] FILTER GROUP (Transmission)  
    (See Separate Illustration)
  Y   SEPARATE ILLUSTRATION
 

#UE0700420153
 

5S-7777: TRANSMISSION ARRANGEMENT

5S7777 TRANSMISSION ARRANGEMENT
AS VIEWED FROM RIGHT HAND SIDE OF MACHINE
Serial No. 23H203, 206, 212 to 216, 219 to 221, 223 to 226, 228 to 231, 233,
236 to 251, 253, 254, 262, 264, 269 to 271, 289 to 291, 299, 300, 303, 304,
306 to 311, 331 to 337, 339 to 350, 352 to 354 & 23H357 to 23H1606 inclusive.
Transfer Gear parts are shown on Pages 91A & 91B, 1T690 Hydraulic Torque
Converter Assembly on Pages 92 & 92A, Manifold & Screen Page 92B, Planetary
Transmission on Pages 96B, 97, 97A & 97B, Transmission Hydraulic Control on
Pages 100 & 101, 2S6457 Transmission Filter, 2S5842 Transmission Pump,
2S5843 Scavenge Pump & 7S8595 Scavenge Pump parts on Pages 103, 105 & 105B
c122286 UE070042
5S7777 TRANSMISSION ARRANGEMENT Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. [1] MANIFOLD AND SCREEN  
2. 2S-5843 [1] PUMP GROUP (Scavenge)  
    -or-
  7S-8595 [1] PUMP GROUP (Scavenge)  
3. 2S-5842 [1] PUMP GROUP (Transmission)  
4. 1T-0690 [1] CONVERTER ASSEM.  
5. [1] TRANSFER GEAR  
6. [1] CONTROL GROUP  
7. [1] PLANETARY TRANSMISSION  
8. 2S-6457 Y [1] FILTER GROUP (Transmission)  
    (See Separate Illustration)
  Y   SEPARATE ILLUSTRATION
 

#UE0700420154
 

5S-7777: TRANSMISSION ARRANGEMENT

5S7777 TRANSMISSION ARRANGEMENT--As Viewed from Right Hand Side of Machine
Effective with Serial No. 23H1607-Up & Test No. 1758-Up. Transfer Gear parts are shown on Pages 91C & 91D, 1T690 Torque Converter
on Page 92A, Manifold & Screen on Page 92B, Planetary Transmission on Pages 97C through 97K, Hydraulic Control on Pages 100B & 101,
2S6457 Filter, 2S5842 & 7S8595 Pump parts on Pages 103 & 105B
c104993 UE070042
5S7777 TRANSMISSION ARRANGEMENT Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. [1] MANIFOLD AND SCREEN  
2. 7S-8595 [1] PUMP GROUP (Scavenge)  
3. 2S-5842 [1] PUMP GROUP (Transmission)  
4. 1T-0690 [1] CONVERTER GROUP  
5. [1] TRANSFER GEAR  
6. [1] CONTROL GROUP  
7. [1] PLANETARY TRANSMISSION  
8. 2S-6457 Y [1] FILTER GROUP (Transmission)  
    (See Separate Illustration)
9. 0L-1351 [22] BOLT  
10. 3B-4506 [39] LOCKWASHER  
11. 5S-7803 [1] GASKET  
12. 9M-2133 [1] COVER  
13. 9M-2132 [1] GASKET  
14. 1D-4717 [4] NUT  
15. 5S-7802 [1] COVER ASSEM.  
16. 7M-7794 [4] STUD  
    (Part of 5S7802 Cover Assem.)
17. 0S-1594 [3] BOLT  
18. 5M-2894 [3] WASHER  
19. 5S-7809 [1] COVER  
20. 5S-7054 [1] COVER  
21. 5S-7056 [1] GASKET  
22. 1A-2029 [10] BOLT  
  3S-1265 [1] COVERS GROUP  
    (Not shown-used for shipping and storage)
  Y   SEPARATE ILLUSTRATION
 

#UE0700420155
 

TRANSFER GEAR

TRANSFER GEAR
Part of 3S148 Transmission Arrangement
c78956 UE070042
None TRANSFER GEAR Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4S-8566 [1] PLUG ASSEM.  
2. 3D-2824 [1] SEAL  
    (Part of 4S8566 Plug Assem.)
3. 8M-4437 [2] SEAL  
4. 1S-5592 [1] SLEEVE  
5. 2S-6471 [1] CASE ASSEM.  
6. 7M-0950 [1] PLUG  
7. 8B-1312 [2] DOWEL  
    (Parts of 2S6471 Case Assem.)
8. 1S-5573 [1] SHAFT  
9. 0S-1594 [20] BOLT  
10. 3B-4506 [12] LOCKWASHER  
11. 5M-7908 [2] PLUG ASSEM.  
12. 3J-1907 [2] SEAL  
    (1 in each 5M7908 Plug Assem.)
13. 7B-3235 [13] BOLT  
  3B-4508 [13] LOCKWASHER  
14. 2K-6044 [1] BEARING  
  2M-3974 [1] RING  
15. 1S-5580 [1] CAGE  
16. 3B-1915 [4] BOLT  
17. 1S-5581 [1] GEAR (54 Teeth)  
18. 5H-4081 [1] SEAL  
19. 1S-5576 [1] GEAR (52 Teeth)  
20. 4F-4993 [2] CONE  
21. 7H-2620 [2] CUP  
22. 2S-0679 [1] BEARING ASSEM.  
23. 3M-5044 [2] CONE  
24. 1S-5570 [1] CAGE  
25. 5D-1071 [1] SEAL  
26. 1S-5571 [6] SHIM (.007" Thick)  
  1S-5572 [8] SHIM (.005" Thick)  
27. 1S-5579 [1] GEAR (58 Teeth)  
28. 1S-5578 [1] GEAR (52 Teeth)  
29. 0S-1588 [6] BOLT  
30. 3M-5043 [2] CUP  
31. 8M-0903 [1] RING  
32. 6L-1649 [1] SEAL  
33. 1S-5577 [1] GEAR (53 Teeth)  
34. 2S-6469 [1] CAGE ASSEM.  
35. 2D-0604 [1] BUTTON  
    (Part of 2S6469 Cage Assem.)
 

#UE0700420156
 

TRANSFER GEAR

TRANSFER GEAR--Part 1 of 2
Serial No. 23H203, 206, 212 to 216, 219, to 221, 223 to 226, 228 to 231, 233,
236 to 251, 253, 254, 262, 264, 269 to 271, 289 to 291, 299, 300, 303, 304,
306 to 311, 331 to 337, 339 to 350, 352 to 354 & 23H357 to 23H1606 inclusive
Part of 5S7777 & 5S7778 Arrangements shown on Pages 90A & 180B-1
c97394 UE070042
None TRANSFER GEAR Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5S-7060 [1] CASE ASSEM.  
2. 8B-1312 [2] DOWEL  
3. 5S-7063 [1] TUBE  
4. 5S-7804 [3] CLIP  
5. 5S-7061 [1] TUBE  
6. 5S-7062 [1] TUBE  
7. 4F-4879 [4] BOLT  
8. 5D-6523 [1] CLIP  
9. 7M-0950 [1] PLUG  
10. 5S-7064 [1] TUBE  
11. 5S-7805 [3] CLIP  
12. 5S-7047 [2] BEARING  
    (Parts of 5S7060 Case Assem.)
13. 8M-4437 [6] SEAL  
14. 1S-5592 [1] SLEEVE  
15. 4S-8566 [1] PLUG ASSEM.  
16. 3D-2824 [1] SEAL  
    (Part of 4S8566 Plug Assem.)
17. 5M-7908 [2] PLUG ASSEM.  
  3J-1907 [2] SEAL  
    (1 in each 5M7908 Plug Assem.)
18. 7B-3235 [13] BOLT  
  3B-4508 [13] LOCKWASHER  
19. 2K-6044 [1] BEARING  
  2M-3974 [1] RING  
20. 1S-5580 [1] CAGE  
21. 3B-1915 [4] BOLT  
22. 1S-5581 [1] GEAR (54 Teeth)  
 

#UE0700420157
 

TRANSFER GEAR

TRANSFER GEAR--Part 2 of 2
Serial No. 23H203, 206, 212 to 216, 219 to 221, 223 to 226, 228 to 231, 233,
236 to 251, 253, 254, 262, 264, 269 to 271, 289 to 291, 299, 300, 303, 304, 306 to 311, 331 to 337, 339 to 350, 352 to 354 & 23H357 to 23H1606 inclusive
Part of 5S7777 & 5S7778 Arrangements shown on Pages 90A & 180B-1
c156703 UE070042
None TRANSFER GEAR Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 0S-1594 [30] BOLT  
2. 3B-4506 [22] LOCKWASHER  
3. 5H-4081 [1] SEAL  
4. 1S-5576 [1] GEAR (52 Teeth)  
5. 7H-2620 [2] CUP  
6. 4F-4993 [2] CONE  
7. 1S-5577 [1] GEAR (53 Teeth)  
8. 2S-0679 [1] BEARING ASSEM.  
9. 1S-5573 [1] SHAFT  
10. 8M-0903 [1] RING  
11. 3M-5044 [2] CONE  
12. 3M-5043 [2] CUP  
13. 1S-5570 [1] CAGE  
14. 5D-1071 [1] SEAL  
15. 1S-5571 [6] SHIM 18 mm(.007 in.) thick  
  1S-5572 [8] SHIM .14 mm(.005 in.) thick  
16. 1S-5579 [1] GEAR (58 Teeth)  
17. 1S-5578 [1] GEAR (52 Teeth)  
18. 5S-7056 [1] GASKET  
19. 5S-7054 [1] COVER  
20. 0S-1588 [6] BOLT  
21. 6L-1649 [1] SEAL  
22. 2S-6469 [1] CAGE ASSEM.  
    (Includes)
23. 2D-0604 [1] BUTTON  
 

#UE0700420158
 

TRANSFER GEAR

TRANSFER GEAR--Part 1 of 2
Effective with Serial No. 23H1607-Up & Test No. 1758-Up. part of 5S7777 &
5S7778 Arrangements shown on Pages 90B & 180B-1
c104994 UE070042
None TRANSFER GEAR Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5S-7060 [1] CASE ASSEM.  
2. 8B-1312 [2] DOWEL  
3. 5S-7063 [1] TUBE  
4. 5S-7804 [2] CLIP (2.54" long)  
5. 5S-7061 [1] TUBE  
6. 5S-7062 [1] TUBE  
7. 4F-4879 [4] BOLT  
8. 5D-6523 [1] CLIP  
9. 7M-0950 [1] PLUG  
10. 5S-7965 [1] TUBE  
11. 5S-7805 [2] CLIP (2.11" long)  
12. 5S-7047 [2] BEARING  
13. 5S-7966 [1] CLIP  
    (Parts of 5S7060 Case Assem.)
14. 8M-4437 [6] SEAL  
15. 1S-5592 [1] SLEEVE  
16. 4S-8566 [1] PLUG ASSEM.  
17. 3D-2824 [1] SEAL  
    (Part of 4S8566 Plug Assem.)
18. 5M-7908 [2] PLUG ASSEM.  
  3J-1907 [2] SEAL  
    (1 in each 5M7908 Plug Assem.)
19. 7B-3235 [13] BOLT  
  3B-4508 [13] LOCKWASHER  
20. 2K-6044 [1] BEARING  
  2M-3974 [1] RING  
21. 1S-5580 [1] CAGE  
22. 3B-1915 [4] BOLT  
23. 1S-5581 [1] GEAR (54 Teeth)  
 

#UE0700420159
 

TRANSFER GEAR

TRANSFER GEAR--Part 2 of 2
Effective with Serial No. 23H1607-Up & Test No. 1758-Up. Part of 5S7777 &
5S7778 Arrangement shown on Pages 90B & 180B-1
c156704 UE070042
None TRANSFER GEAR Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 1A-2029 C [20] BOLT  
2. 3B-4506 C [12] LOCKWASHER  
3. 5H-4081 [1] SEAL  
4. 1S-5576 [1] GEAR (52 Teeth)  
5. 7H-2620 [2] CUP  
6. 4F-4993 [2] CONE  
7. 1S-5577 [1] GEAR (53 Teeth)  
8. 2S-0679 [1] BEARING ASSEM.  
9. 1S-5573 [1] SHAFT  
10. 8M-0903 [1] RING  
11. 8S-9152 C [2] CONE  
12. 8S-9151 C [2] CUP  
13. 1S-5570 [1] CAGE  
14. 5D-1071 [1] SEAL  
15. 7S-6971 C [4] SHIM .39 mm(.015 in.) thick  
  1S-5571 [6] SHIM .18 mm(.007 in.) thick  
  1S-5572 [8] SHIM .14 mm(.005 in.) thick  
16. 1S-5579 [1] GEAR (58 Teeth)  
17. 1S-5578 [1] GEAR (52 Teeth)  
18. 0S-1588 [6] BOLT  
19. 6L-1649 [1] SEAL  
20. 2S-6469 [1] CAGE ASSEM.  
    (Includes)
21. 2D-0604 [1] BUTTON  
  C   INDICATES CHANGE
 

Information:

Reuse And Salvage Guidelines
Specifications for Inspection of Driveline Fasteners {3030, 3101, 3159, 3253, 3258, 3278, 4050}
Specifications for Inspection of Driveline Fasteners {3030, 3101, 3159, 3253, 3258, 3278, 4050}
Torque Converter, Divider, Drive Line, and Drive Axle Reuse and Salvage Manual Contents {0374, 3000, 3050, 3100, 3250, 3251, 3253, 3258}
Torque Converter, Divider, Drive Line, and Drive Axle Reuse and Salvage Manual Contents {0374, 3000, 3050, 3100, 3250, 3251, 3253, 3258}
Procedure to Machine Damaged Transmission and Differential Yokes {3030, 3253, 3258}
Procedure to Machine Damaged Transmission and Differential Yokes {3030, 3253, 3258}

Caterpillar Parts SIS Catalog 621 :

DRIVE SHAFT GUARD
DRIVE SHAFT GUARD
DRIVE SHAFT GUARD
DRIVE SHAFT GUARD
DRIVE SHAFT
DRIVE SHAFT
TRANSFER GEAR
TRANSFER GEAR
TRANSFER GEAR
TRANSFER GEAR
GENERATOR ASSEMBLY
1M-6058 GENERATOR ASSEMBLY
GENERATOR
GENERATOR
DASH LAMP ASSEMBLY
2M-6646 DASH LAMP ASSEMBLY
COUPLING GROUP
4S-5844 COUPLING GROUP
TRANSMISSION ARRANGEMENT
3S-0148 TRANSMISSION ARRANGEMENT
TRANSMISSION ARRANGEMENT
5S-7777 TRANSMISSION ARRANGEMENT
TRANSMISSION ARRANGEMENT
5S-7777 TRANSMISSION ARRANGEMENT
TRANSFER GEAR
TRANSFER GEAR
TRANSFER GEAR
TRANSFER GEAR
TRANSFER GEAR
TRANSFER GEAR
TRANSFER GEAR
TRANSFER GEAR

Truck sale:

Caterpillar 621K WT, water trucks, Transport
699,500 
Caterpillar 621K WT, water trucks, Transport
- water trucks
HOLT OF CALIFORNIA
Caterpillar 621K, Road Scraper, Construction
379,500 
Caterpillar 621K, Road Scraper, Construction
- Road Scraper
ALTORFER INC.
 
826,455 
Caterpillar 621K, Road Scraper, Construction


Caterpillar 621K, Road Scraper, Construction
500,000 
Caterpillar 621K, Road Scraper, Construction

HOLT CAT
Caterpillar 621K, Road Scraper, Construction
435,000 
Caterpillar 621K, Road Scraper, Construction

CAROLINA CAT
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