AVSPARE.COM
parts catalog
  1. Home
  2. Caterpillar catalog

7D8020 STEERING GEAR GROUP--Part 1 of 2 Serial No. 23H4819-Up 621 WHEEL TRACTOR


STEERING SYSTEM
STEERING GEAR GP
LINES GP
HYDRAULIC SYSTEM
LINES GP-HYDRAULIC
STEERING SYSTEM
VALVE GP
CYLINDER GP

WHEEL TRACTOR 621 WHEEL TRACTOR 23H
 621 TRACTOR 23H04299-UP (MACHINE) UEG0630S 621 23H   (1966)

STEERING SYSTEM

STEERING GEAR GP
STEERING GEAR GROUP
7D-8020 STEERING GEAR GROUP
STEERING GEAR GROUP
7D-8020 STEERING GEAR GROUP
STEERING GEAR GROUP
7D-8020 STEERING GEAR GROUP
STEERING GEAR GROUP
7D-8020 STEERING GEAR GROUP
STEERING GEAR GROUP
5D-6370 STEERING GEAR GROUP
STEERING GEAR GROUP
5D-6370 STEERING GEAR GROUP
 

#UEG0630S0230
 

7D-8020: STEERING GEAR GROUP

7D8020 STEERING GEAR GROUP--Part 1 of 2
Serial No. 23H4819-Up
c148892 UEG0630S
7D8020 STEERING GEAR 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. 5F-5442 [4] SCREW  
2. 5B-1484 [1] NUT  
3. 2H-9458 [1] GASKET  
4. 4D-0874 [1] COVER  
5. 5F-2815 [1] WHEEL  
6. 1H-8647 [1] RING  
7. 6B-4204 [1] BRACKET  
8. 0S-1590 [2] BOLT  
9. 3B-4506 [16] LOCKWASHER  
10. 8D-6897 C [1] COLUMN ASSEM.  
11. 0S-1591 [6] BOLT  
12. 5F-6367 [1] RETAINER ASSEM.  
13. 7F-9557 [1] BEARING  
14. 5F-6363 [2] WASHER  
15. 5F-6338 [1] WASHER  
16. 5F-6447 [1] NUT  
17. 5F-6445 [1] LEVER  
18. 1A-2029 [1] BOLT  
19. 5F-6393 [1] SHAFT  
  1B-8706 [2] KEY  
20. 7F-8267 [1] SEAL  
21. 2B-7408 [1] PLUG  
22. 2D-2199 [1] CAP ASSEM.  
23. 7F-9557 [1] BEARING  
24. 0S-1594 [6] BOLT  
25. 9M-5552 [12] SHIM (Use as Required)  
26. 0S-1585 [2] BOLT  
  1D-4719 [2] NUT  
  3B-4508 [2] LOCKWASHER  
  4B-4280 [2] WASHER  
27. 7F-1621 [1] SECTOR  
28. 2B-7457 [1] PLUG  
29. 5F-6368 [2] GASKET  
30. 5F-6443 [1] SHAFT  
31. 2B-7409 [1] PLUG  
32. 7D-5967 [1] SHAFT ASSEM.  
33. 6B-4202 [1] GASKET  
34. 0S-1590 [2] BOLT  
35. 6B-4203 [1] CLAMP  
36. 2D-9487 [1] NUT  
37. 7B-2380 [1] BEARING  
38. 3B-8488 [1] FITTING  
39. 9M-7432 [1] SEAL  
40. 1B-8708 [1] KEY  
  C   INDICATES CHANGE
 

#UEG0630S0231
 

7D-8020: STEERING GEAR GROUP

7D8020 STEERING GEAR GROUP--Part 2 of 2
Serial No. 23H4819-Up
c143499 UEG0630S
7D8020 STEERING GEAR 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. 5D-0373 [1] HOUSING ASSEM.  
2. 7F-9559 [1] BEARING  
3. 7F-9558 [1] BEARING  
4. 0S-1594 [10] BOLT  
5. 5L-5840 [8] WASHER  
6. 5F-5551 [1] COVER  
  5F-5552 [1] GASKET  
  4B-3596 [1] SCREW  
7. 2H-3789 [1] NUT  
  0L-1213 [1] GASKET  
8. 6B-5262 [1] PLUG  
  5B-3265 [1] GASKET  
9. 7B-0280 [1] SEAL  
  [1] END  
10. 7B-9309 [1] ROD  
  1B-4205 [1] NUT  
11. 5H-6968 [1] LEVER  
12. 0S-0175 [2] PIN  
  3B-4615 [2] COTTER PIN  
13. 0S-1588 [1] BOLT  
14. 8D-5817 [1] SUPPORT ASSEM.  
15. 9F-2978 [6] NUT  
16. 8F-9836 [4] LUG  
17. 5F-6448 [1] SHAFT  
  1B-8722 [2] KEY  
18. 0L-0702 [2] NUT  
  3B-4518 [2] LOCKWASHER  
19. 6D-5087 [1] LEVER  
20. 7M-8930 [1] SEAL  
21. 5F-6436 [1] HOUSING ASSEM.  
22. 5F-3728 [2] BEARING  
23. 7B-3235 [6] BOLT  
  5L-5180 [6] WASHER  
24. 5F-6545 [1] GASKET  
25. 3B-4506 [6] LOCKWASHER  
26. 0S-1571 [4] BOLT  
  1P-7115 [4] MOUNTING  
  3K-0925 [4] SPACER  
 

#UEG0630S0232
 

7D-8490: LINES GP-STEERING

STEERING LINES (7D8490 N/S)--Part 1 of 2
8J2386 Valve parts are shown on Page 119
c116152 UEG0630S
7D8490 LINES GP-STEERING 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-7722 [1] HOSE ASSEM.  
  8S-9355 H HOSE 29.2"  
2. 3S-8494 [1] STEM ASSEM.  
3. 3S-7252 [2] SLEEVE  
4. 3S-8493 [1] STEM ASSEM.  
5. 6J-3600 [2] SEAL  
6. 6D-8453 [1] PLATE ASSEM.  
7. 5M-3012 [1] BLOCK  
8. 5B-5059 [3] BOLT  
  1D-4718 [3] NUT  
  3B-4507 [3] LOCKWASHER  
9. 8J-2386 Y [1] VALVE GROUP  
    (Separate Illustration)
10. 0S-1585 [4] BOLT  
  1D-4719 [4] NUT  
11. 3B-4508 [4] LOCKWASHER  
12. 5D-6124 [1] ELBOW  
13. 0S-0509 [1] BOLT  
14. 3B-4506 [1] LOCKWASHER  
15. 5B-1345 [1] CLIP  
16. 0S-1588 [8] BOLT  
17. 1P-4577 [6] FLANGE  
18. 5D-9522 [1] UNION  
  3J-1907 [1] SEAL  
19. 7D-9171 [1] HOSE ASSEM. (92"Long Overall)  
  8S-9355 H HOSE 61.6"  
21. 7S-0575 [1] STEM ASSEM. (90 DEGREE)  
22. 3S-7252 [2] SLEEVE  
23. 3S-8501 [1] STEM ASSEM. (60 DEGREE)  
20. 8D-0398 [1] HOSE ASSEM.  
24. 4J-0520 [1] SEAL  
25. 4J-0522 [1] SEAL  
26. 1P-4578 [2] FLANGE  
27. 0T-0772 [4] BOLT  
  Y   SEPARATE ILLUSTRATION
  H   ORDER BY THE INCH
 

#UEG0630S0233
 

7D-8490: LINES GP-STEERING

STEERING LINES (7D8490 N/S)--Part 2 of 2
c142773 UEG0630S
7D8490 LINES GP-STEERING Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 0L-1143 [9] BOLT  
2. 1D-4717 [12] NUT  
3. 3B-4506 [18] LOCKWASHER  
4. 5D-7341 [1] BLOCK  
5. 5D-2516 [2] SPACER  
6. 5S-7717 [1] HOSE ASSEM.  
  9S-0247 H HOSE 57.6"  
7. 3S-8369 [2] STEM ASSEM.  
8. 3S-7166 [2] SLEEVE  
9. 4D-6463 [1] CLIP  
10. 1P-4576 [16] FLANGE  
11. 6J-3575 [8] SEAL  
12. 0S-1588 [12] BOLT  
13. 0L-2070 [1] BOLT  
14. 5D-7845 [3] CLAMP  
15. 8D-9931 [1] BRACKET  
16. 0S-1594 [2] BOLT  
17. 5D-7869 [1] PLATE ASSEM.  
  9F-2978 [1] NUT (Weld)  
18. 0S-1591 [1] BOLT  
19. 4B-5271 [2] WASHER  
20. 8D-9939 [1] HOSE ASSEM.  
  9S-0247 HOSE 66 in.  
21. 3S-8369 [2] STEM ASSEM. (90 degrees)  
22. 3S-7166 [2] SLEEVE  
23. 5S-7718 [1] HOSE ASSEM.  
  9S-0247 H HOSE 21.5"  
24. 3S-8369 [1] STEM ASSEM. (90 degrees)  
25. 3S-7166 [2] SLEEVE  
26. 3S-8367 [1] STEM ASSEM. (60 degrees)  
27. 5S-7721 [1] HOSE ASSEM.  
  9S-0247 H HOSE 17.3"  
28. 3S-8367 [1] STEM ASSEM. (60 degrees)  
29. 3S-7166 [2] SLEEVE  
30. 3S-8369 [1] STEM ASSEM. (90 degrees)  
31. 6H-1717 [3] BOLT  
32. 3B-4508 [3] LOCKWASHER  
  H   ORDER BY THE INCH
 

#UEG0630S0234
 

7J-0472: STEERING LINES GROUP

7J472 STEERING LINES GROUP
Also part of 8D2470 Hitch, Steering and Hydraulic Arrangement listed on Page 206
c139565 UEG0630S
7J0472 STEERING LINES 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. 7J-0500 [2] HOSE ASSEM.  
  9S-0247 H HOSE 27.5"  
  5S-5293 [1] STEM ASSEM. (90 degrees)  
2. 3S-7166 [2] SLEEVE  
3. 5S-5291 [1] STEM ASSEM. (Straight)  
4. 7J-0471 [2] TUBE ASSEM.  
5. 5J-7157 [1] VALVE  
  4J-5268 [1] SEAL  
6. 6J-3600 [10] SEAL  
7. 0T-0573 [8] BOLT  
8. 3B-4506 C [20] LOCKWASHER  
9. 0S-1573 [2] BOLT  
  3B-4508 [2] LOCKWASHER  
  3K-8242 C [2] WASHER  
10. 0L-1351 [2] BOLT  
11. 2D-2285 [16] BOLT  
12. 1P-4577 C [16] FLANGE  
13. 7J-0728 C [4] CLIP (Small)  
  7J-0729 [4] CLIP (Large)  
14. 7J-0498 [1] TUBE ASSEM. (L.H.)  
15. 2A-4639 [8] BOLT  
16. 7J-0497 [1] TUBE ASSEM. (R.H.)  
17. 7J-0473 [1] BLOCK ASSEM.  
18. 1P-4576 C [4] FLANGE  
19. 6J-3575 [2] SEAL  
20. 0S-1588 C [24] BOLT  
21. 1A-2029 [2] BOLT  
  1D-4717 [2] NUT  
  2D-6005 [2] WASHER  
22. 7S-0242 [2] HOSE ASSEM.  
  9S-0247 H HOSE 31.2"  
23. 3S-7166 [2] SLEEVE  
24. 5S-5293 [1] STEM ASSEM. (90 degrees)  
25. 3S-8391 [1] STEM ASSEM. (Straight)  
26. 5M-8291 C [2] LUG  
  C   INDICATES CHANGE
  H   ORDER BY THE INCH
 

#UEG0630S0235
 

3G-0465: HOSE AS

3G465 HOSE ASSEMBLY
Provides Field Replacement of 7J500 Hose Assembly shown on Page 124 and requires
use of 1--4J520 Seal with 1.296 I.D. and 1--4J522 Seal with 1.484 I.D.
UEG0630S0235 UEG0630S
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  3S-7166 [2] SLEEVE  
  5S-5283 [1] STEM ASSEMBLY STRAIGHT  
  5S-6102 [1] STEM ASSEMBLY 90 DEGREES  
  5P-0180 HOSE 70 CM  
 

#UEG0630S0236
 

8J-1929: BASIC VALVE GROUP

8J1929 BASIC VALVE GROUP
Part of 8J2386 Steering Valve Group shown on Page 119
c136558 UEG0630S
8J1929 BASIC VALVE 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. 1J-9671 [2] SEAL  
2. 7J-8066 [1] SEAT  
3. 8J-0507 [1] SEAT  
4. 3K-0360 [1] SEAL  
5. 9S-4185 [1] PLUG  
6. 3J-1907 [2] SEAL  
7. 4B-9782 [1] BALL  
8. 9S-8004 [1] PLUG  
9. 4J-8947 [1] SPRING  
10. 4B-9880 [1] BALL  
11. [1] STEM  
12. 9S-8003 [1] PLUG  
13. 8F-9538 [1] SEAL  
14. 4J-9780 [1] PLUG  
15. 4J-8634 [1] RETAINER  
16. 4J-7549 [1] BOLT  
  3B-4506 [1] LOCKWASHER  
17. 1T-0689 [1] WASHER  
18. 4J-8224 [3] SHIM (.010" Thick)  
  5J-4776 [1] SHIM (.005" Thick)  
19. 9S-8001 [3] PLUG  
  4J-7533 [3] SEAL  
20. [1] VALVE  
 

#UEG0630S0237
 

5J-1326: CYLINDER GP-STEER

5J1326 STEERING CYLINDER GROUP--5" Bore x 31.70" Stroke--2 Required
Also part of 8D2470 Hitch, Steering and Hydraulic Arrangement listed on Page 206
c115618 UEG0630S
5J1326 CYLINDER GP-STEER Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5J-5731 [2] NUT  
2. 5J-2388 [1] CYLINDER ASSEM.  
3. 5J-2385 [1] ROD ASSEM.  
4. 3J-9134 [2] BEARING  
5. 5J-2661 [1] PISTON  
6. 5F-3144 [1] SEAL  
7. 2K-4096 [1] RING  
8. 5J-3616 [1] SEAL  
9. 5J-8225 [1] SEAL  
10. 4J-3515 [1] SEAL  
11. 3B-8489 [1] FITTING  
12. 1A-8063 [4] BOLT  
  3B-4512 [4] LOCKWASHER  
13. 6J-8322 [1] HEAD  
14. 5J-5020 [1] SEAL ASSEM.  
15. 4J-3420 [1] RING  
 

#UEG0630S0238
 

5J-8606: STEERING SERVO-MASTER CYLINDER GROUP

5J8606 STEERING SERVO-MASTER CYLINDER GROUP (Change 0-5)--1.5" Bore x 9.40" Stroke
c212309 UEG0630S
5J8606 STEERING SERVO-MASTER CYLINDER 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. 5J-8957 R [1] ROD ASSEM.  
    (Includes)
2. 3H-5823 [2] RING  
3. 9M-3914 [1] BEARING  
4. 6J-1879 [1] WIPER  
5. 6J-1878 [1] PACKING  
6. 8M-8157 [2] SEAL  
7. 9S-8001 C [2] PLUG  
  4J-7533 [2] SEAL  
8. 5J-8774 [1] HEAD  
9. 0S-1571 [4] BOLT  
10. 3B-4506 [12] LOCKWASHER  
11. 7J-4082 [1] BODY ASSEM.  
    (Includes)
  5J-8772 [1] BODY  
12. 2D-6642 [2] BALL  
13. 5J-8004 [2] SPRING  
14. 8M-4437 [2] SEAL  
15. 6J-1833 [2] PLUG  
16. 8M-4435 [2] SEAL  
17. 6J-1832 [12] SHIM  
18. 5J-7157 C [2] VALVE  
19. 5J-8792 [1] HEAD ASSEM.  
    (Includes)
20. 9M-3914 [1] BEARING  
21. 3H-5823 [2] RING  
22. 0S-1588 [4] BOLT  
23. 4J-0521 [2] SEAL  
24. 9M-5048 [1] NUT  
25. 5J-9073 [1] RING  
26. 5J-9822 [2] SEAL ASSEM.  
27. 5J-9072 [1] PISTON  
28. 5J-8335 R [1] BODY  
29. 5J-8773 [1] RETAINER  
30. 0S-1591 [4] BOLT  
  C   INDICATES CHANGE
  R   REMFG PART MAY BE AVAILABLE
 

#UEG0630S0239
 

5J-7977: STEERING CYLINDER GROUP

5J7977 STEERING CYLINDER GROUP--2" Bore x 5" Stroke
Part of Steering Servo-Receiver Mounting and Cylinder and
8D3175 Mounting and Cylinder Group shown on Pages 129 & 172
c116161 UEG0630S
5J7977 STEERING CYLINDER 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. [1] ROD ASSEM.  
2. [1] BEARING  
3. [2] RING  
4. [4] BOLT  
5. [4] LOCKWASHER  
6. [1] WIPER  
7. [1] HEAD ASSEM.  
8. [1] SEAT  
9. [1] BALL  
10. [1] SPRING  
11. [1] TUBE  
12. [1] PISTON  
13. [1] RING  
14. [2] RING  
15. [1] HEAD ASSEM.  
16. [1] SEAT  
17. [1] BALL  
18. [1] BEARING  
19. [2] RING  
20. [1] SPRING  
21. [2] RING  
22. [2] SEAL  
23. [1] NUT  
24. [2] SEAL ASSEM.  
25. [1] SEAL  
26. [1] RETAINER  
 

Information:

Specifications
Steering Gear
621 & J621 WHEEL TRACTOR-SCRAPERS STEERING SYSTEM
Follow-Up Linkage
621 & J621 WHEEL TRACTOR-SCRAPERS STEERING SYSTEM
Steering Gear
621, 623 & 627 WHEEL TRACTOR-SCRAPERS STEERING SYSTEM (HYDRA
Disassembly and Assembly
Steering Wheel
621 TRACTOR-SCRAPER VEHICLE SYSTEMS
Steering Gear
621 TRACTOR-SCRAPER VEHICLE SYSTEMS
Steering Wheel
J621 ELEVATING SCRAPER VEHICLE SYSTEMS
Steering Gear
J621 ELEVATING SCRAPER VEHICLE SYSTEMS

Caterpillar Parts SIS Catalog 621 :

STEERING GEAR GROUP
7D-8020 STEERING GEAR GROUP
STEERING GEAR GROUP
7D-8020 STEERING GEAR GROUP
STEERING GEAR
7D-8020 STEERING GEAR
STEERING GEAR
7D-8020 STEERING GEAR
STEERING VALVE GROUP
8J-2386 STEERING VALVE GROUP
ROTOCHAMBER ASSEMBLY
3D-2119 ROTOCHAMBER ASSEMBLY
RELEASE VALVE ASSEMBLY
4F-6941 RELEASE VALVE ASSEMBLY
VALVE AS
6D-1039 VALVE AS
STEERING GEAR GROUP
7D-8020 STEERING GEAR GROUP
LINES GP-STEERING
7D-8490 LINES GP-STEERING
LINES GP-STEERING
7D-8490 LINES GP-STEERING
STEERING LINES GROUP
7J-0472 STEERING LINES GROUP
3G-0465 HOSE AS
BASIC VALVE GROUP
8J-1929 BASIC VALVE GROUP
CYLINDER GP-STEER
5J-1326 CYLINDER GP-STEER
STEERING SERVO-MASTER CYLINDER GROUP
5J-8606 STEERING SERVO-MASTER CYLINDER GROUP

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
Back to top
Contacts Request list Affiliate disclosure
The names Cat, Caterpillar, John Deere, Komatsu, Volvo, Hitachi, Doosan, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
AVSpare.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only. Cat® and Caterpillar® are registered trademarks of Caterpillar, Inc.