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4F6941 RELEASE VALVE ASSEMBLY Part of Rotochambers, Valve Assemblies & Lines & 6D4700 Control Group shown on Pages 119, 119A, 119B, 119D & 179C 621


BRAKING SYSTEM
VALVE GP
OPERATOR STATION
HORN GP
BRAKING SYSTEM
CHAMBER AS-BRAKE
FRAME AND BODY
LINK GP-STEERING FRAME LOCK
STEERING SYSTEM
STEERING GEAR GP
LINES GP
VALVE GP

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

BRAKING SYSTEM

VALVE GP
ROTOCHAMBERS, VALVE ASSEMBLIES AND LINES
ROTOCHAMBERS, VALVE ASSEMBLIES AND LINES
ROTOCHAMBERS, VALVE ASSEMBLIES AND LINES
ROTOCHAMBERS, VALVE ASSEMBLIES AND LINES
RELEASE VALVE ASSEMBLY
4F-6941 RELEASE VALVE ASSEMBLY
DOUBLE CHECK VALVE ASSEMBLY
6D-3783 DOUBLE CHECK VALVE ASSEMBLY
EMERGENCY RELAY VALVE ASSEMBLY
5D-4555 EMERGENCY RELAY VALVE ASSEMBLY
VALVE GP-CHECK
6D-3781 VALVE GP-CHECK
 

#UE0700420240
 

4F-6941: RELEASE VALVE ASSEMBLY

4F6941 RELEASE VALVE ASSEMBLY
Part of Rotochambers, Valve Assemblies & Lines & 6D4700 Control Group shown on
Pages 119, 119A, 119B, 119D & 179C
c100117 UE070042
4F6941 RELEASE VALVE ASSEMBLY Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  5F-2018 [1] COVER  
  5F-2021 [1] SEAT  
  5F-2019 [1] DIAPHRAGM  
  5F-2017 [1] BODY  
  5F-2022 [1] SPRING  
  5D-5716 [1] SEAL  
 

#UE0700420241
 

5D-6998: HORN GP-AIR

5D6998 PNEUPHONIC HORN ASSEMBLY
Part of Pneuphonic Horn Assembly, Horn Valve and Lines
shown on Pages 116 and 116A
c210113 UE070042
5D6998 HORN GP-AIR 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-6994 [1] PROJECTOR (LH)  
2. 5D-6993 [1] PROJECTOR (RH)  
3. 5D-6997 [1] PAD  
4. 4B-5275 [1] WASHER-SCREW  
5. 5D-6996 [1] ADAPTER  
6. 9S-1354 [1] NUT  
7. 6F-0253 [1] LOCKWASHER  
8. [2] COVER  
   
    THE FOLLOWING REPAIR
    KIT IS AVAILABLE:
  2G-6664 [2] KIT-DIAPHRAGM (AIR HORN) (HORN)  
    (EACH INCLUDES DIAPHRAGM,
    SEAL, DECAL, SCREWS,
    NUTS, GASKET, & INSTRUCTION SHEET)
 

#UE0700420242
 

3D-9943: VALVE AS-HORN

3D9943 HORN VALVE
Part of Pneuphonic Horn Assembly, Horn Valve &
Lines shown on Pages 116 & 116A
c96433 UE070042
3D9943 VALVE AS-HORN Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  4D-1136 [1] BUTTON  
  3B-4609 [1] COTTER PIN  
  [1] BODY  
  4D-1137 [1] STEM  
  4D-1138 [1] VALVE  
  4D-1135 [1] SEAT  
  4D-1133 [1] SPRING  
  9F-5255 [1] STRAINER  
  4D-1134 [1] CAP  
 

#UE0700420243
 

3D-2119: ROTOCHAMBER

3D2119 ROTOCHAMBER
Part of Rotochambers, Valve Assemblies & Lines shown on Pages 119, 119A, 119B & 119D
c105177 UE070042
3D2119 ROTOCHAMBER Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 1B-4202 [8] NUT  
2. 3B-4505 [8] LOCKWASHER  
3. 8F-7334 [1] BODY  
4. 8F-7332 [1] CLAMP  
5. 8F-7331 [1] DIAPHRAGM  
6. 3D-2169 [1] ROD  
7. 8F-7390 [1] GUIDE  
8. 8F-7328 [1] SPRING  
9. 8F-7287 [2] STUD  
10. 3B-4510 [2] LOCKWASHER  
11. [3] NUT  
  8F-9838 [1] YOKE ASSEM.  
12. 3B-4624 [1] COTTER PIN  
13. 8F-9837 [1] BODY  
14. 8F-7263 [1] PIN  
15. 8F-7322 [1] BOOT  
16. [1] COVER  
17. 1B-4201 [8] NUT  
18. 3B-4504 [8] LOCKWASHER  
19. 8F-7330 [1] GUIDE  
20. 8F-7333 [1] CLAMP  
21. 9F-5644 [8] LOCKWASHER  
22. 0T-0642 [8] BOLT  
 

#UE0700420244
 

5D-6238: LINK GROUP

5D6238 LINK GROUP
Part of Steering Gear shown on Page 125
c105176 UE070042
5D6238 LINK GROUP Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  2K-0838 [1] PLUG  
  2K-0840 [1] SPACER  
  2K-0841 [1] SPRING  
  2K-0842 [2] SEAT  
  2K-0839 [1] SEAT  
    (Parts of 5D6239 Link Assem.)
  1D-6306 [2] NUT  
  2H-6886 [1] NUT  
  9M-4148 [1] NUT  
  1B-4333 [1] NUT  
  3B-8488 [1] FITTING  
  5D-6239 [1] LINK ASSEM.  
  2K-0838 [1] PLUG  
  2K-0841 [1] SPRING  
    (Parts of 5D7911 Socket Assem.)
  5D-7911 [1] SOCKET ASSEM.  
  0S-1601 [1] BOLT  
  1B-4206 [1] NUT  
  3B-4510 [1] LOCKWASHER  
    (Parts of 5D7911 Socket Assem.)
  9M-4157 [1] STOP  
  9M-4153 [2] RETAINER  
  9M-4154 [1] RETAINER ASSEM.  
  9M-4150 [1] ROD ASSEM.  
  9M-4158 [1] STOP  
  2D-9989 [1] SEAT  
  2K-0842 [2] SEAT  
    (Parts of 5D7911 Socket Assem.)
  7M-2923 [2] SPRING  
  3B-8488 [1] FITTING  
 

#UE0700420245
 

STEERING GEAR

STEERING GEAR--As Viewed from Left Hand Side of Machine--Part 1 of 3
ADDITIONAL PARTS ARE SHOWN ON PAGES 125 AND 126
c78769 UE070042
None STEERING GEAR Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  4D-0874 [1] COVER  
  2H-9458 [1] GASKET  
  1B-8708 [1] KEY  
  3B-8488 [1] FITTING  
  7B-2380 [1] BEARING  
  6B-4204 [1] BRACKET  
  6B-4202 [1] GASKET  
  0S-1594 [2] BOLT  
  3B-4506 [2] LOCKWASHER  
  4B-4278 [2] WASHER  
  5F-6179 [1] SHAFT ASSEM.  
  5F-6188 [1] COLUMN ASSEM.  
  0S-1591 [6] BOLT  
  3B-4506 [6] LOCKWASHER  
  5F-6367 [1] RETAINER ASSEM.  
  7F-9557 [1] BEARING  
    (PART OF RETAINER ASSEM. 5F6367)
  5F-6363 [1] WASHER  
  5F-6338 [1] WASHER  
  5F-6443 [1] SHAFT  
  5F-6447 [1] NUT (8 TEETH)  
  7F-1621 [1] SECTOR (9 TEETH)  
  1B-8706 [2] KEY  
  5F-6393 [1] SHAFT  
  5F-6445 [1] LEVER  
  1A-2029 [1] BOLT  
  6B-5262 [1] PLUG  
  5B-3265 [1] GASKET  
  0S-1594 [6] BOLT  
  3B-4506 [6] LOCKWASHER  
  2B-7408 [1] PLUG  
  5B-1484 [1] NUT  
  5F-5442 [4] SCREW  
  5F-2815 [1] WHEEL  
  4L-6942 [1] SEAL  
  3B-1418 [1] NUT  
  3B-1417 [1] RING  
  2D-9487 [1] NUT  
  6B-4203 [1] CLAMP  
  0S-1590 [2] BOLT  
  3B-4506 [2] LOCKWASHER  
  2B-7409 [1] PLUG  
  5F-6368 [2] GASKET  
  2B-7457 [1] PLUG  
  0L-0702 [1] NUT  
  3B-4518 [1] LOCKWASHER  
  5F-6448 [1] SHAFT  
  1B-8722 [1] KEY  
  5F-6363 [1] WASHER  
  7F-9557 [1] BEARING  
    (PART OF CAP ASSEM. 2D2199)
  9M-5552 [12] SHIM (.010"THICK)  
  7F-8267 [1] SEAL  
  2D-2199 [1] CAP ASSEM.  
 

#UE0700420246
 

STEERING GEAR

STEERING GEAR--As Viewed from Left Hand Side of Machine--Part 2 of 3
5D6238 Link parts are shown on Page 123
ADDITIONAL PARTS ARE SHOWN ON PAGES 124 & 126
c105075 UE070042
None STEERING GEAR Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  5F-5551 [1] COVER  
  0S-1594 [8] BOLT  
  5L-5840 [8] WASHER  
  5F-5552 [1] GASKET  
  3D-7301 [1] BOOT  
  0S-0175 [2] PIN  
  3B-4615 [2] COTTER PIN  
  6F-7010 [1] END  
  1B-4205 [1] NUT  
  7B-9309 [1] ROD  
  5D-6238 Y [1] LINK GROUP  
    (SEE SEPARATE ILLUSTRATION)
  3B-4632 [2] COTTER PIN  
  3D-7172 [1] BOOT  
  7F-7943 [1] WASHER  
  5D-6267 [1] BELLCRANK ASSEM.  
  7B-0503 [1] BALL STUD  
    (PART OF BELLCRANK ASSEM. 5D6267)
  3B-8489 [1] FITTING  
  9H-5205 [2] BEARING  
  5D-7815 [1] PIN  
  3B-5753 [1] NUT  
  3B-4518 [1] LOCKWASHER  
  5D-6168 [1] SUPPORT  
  1D-4720 [3] NUT  
  3B-4510 [3] LOCKWASHER  
  Y   SEPARATE ILLUSTRATION
 

#UE0700420247
 

STEERING GEAR

STEERING GEAR--As Viewed from Front of Machine--Part 3 of 3
ADDITIONAL PARTS ARE SHOWN ON PAGES 124 & 125
c105901 UE070042
None STEERING GEAR Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  0S-1594 [6] BOLT  
  3B-4506 [6] LOCKWASHER  
  9F-2978 [6] NUT (WELD)  
    (PART OF SUPPORT ASSEM. 7D2170)
  5F-6436 [1] HOUSING ASSEM.  
  5F-3728 [2] BEARING  
    (PART OF HOUSING ASSEM. 5F6436)
  7M-8930 [1] SEAL  
  3B-4518 [1] LOCKWASHER  
  0L-0702 [1] NUT  
  5D-6266 [1] LEVER ASSEM.  
  1B-8722 [1] KEY  
  7B-0503 [1] BALL STUD  
    (PART OF LEVER ASSEM. 5D6266)
  0S-1585 [2] BOLT  
  1D-4719 [2] NUT  
  3B-4508 [2] LOCKWASHER  
  7D-2170 [1] SUPPORT ASSEM.  
  7B-3235 [6] BOLT  
  5L-5180 [6] WASHER  
  5F-6545 [1] GASKET  
  4B-3596 [1] SCREW (2"LONG)  
  2H-3789 [1] NUT  
  0L-1213 [1] GASKET  
  0S-1588 [1] BOLT  
  7B-0280 [1] SEAL  
  7F-9559 [1] BEARING  
    (PART OF HOUSING ASSEM. 5D373)
  5D-0373 [1] HOUSING ASSEM.  
  7F-9558 [1] BEARING  
    (PART OF HOUSING ASSEM. 5D373)
  5H-6968 [1] LEVER  
 

#UE0700420248
 

STEERING LINES

STEERING LINES
5J3580 Valve parts are shown on Pages 128 through 129F
c78324 UE070042
None STEERING LINES 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-3580 Y [1] VALVE GROUP  
    (See Separate Illustration)
2. 5D-7981 [1] PLATE ASSEM.  
  5M-3012 [1] BLOCK  
    (Part of 5D7981 Plate Assem.)
3. 4F-7226 [1] BOLT (4" Long)  
  5B-5059 [2] BOLT (5" Long)  
  1D-4718 [3] NUT  
4. 3B-4507 [7] LOCKWASHER  
5. 1H-3305 [6] FLANGE  
6. 5J-1356 [3] SEAL  
7. 0S-1588 [20] BOLT  
8. 3B-4506 [35] LOCKWASHER  
9. 2K-0190 [16] FLANGE  
10. 5J-1584 [8] SEAL  
11. 0S-1585 [4] BOLT  
  1D-4719 [4] NUT  
12. 3B-4508 [7] LOCKWASHER  
13. 5D-6124 [1] ELBOW  
14. 1J-9671 [1] SEAL  
    (Part of 5D6124 Elbow)
15. 0S-0509 [1] BOLT  
16. 5B-1345 [2] CLIP  
17. 5D-6078 [1] HOSE ASSEM. (70" Long Overall)  
18. 5D-6077 [1] HOSE ASSEM. (63" Long Overall)  
19. 0L-2070 [9] BOLT  
20. 1D-4717 [12] NUT  
21. 0S-1591 [1] BOLT  
22. 4B-5271 [2] WASHER  
23. 3D-7587 [1] UNION  
24. 0T-0772 [4] BOLT  
25. 3H-3667 [2] FLANGE  
26. 5J-1357 [1] SEAL  
27. 5D-7671 [1] HOSE ASSEM. (25" Long Overall)  
28. 5D-6079 [1] HOSE ASSEM. (23.75" Long Overall)  
29. 5D-7341 [1] BLOCK  
30. 6H-1717 [3] BOLT  
31. 5D-7725 [1] HOSE ASSEM. (62" Long Overall)  
32. 0S-1590 [1] BOLT  
33. 5D-7845 [3] CLAMP  
34. 5D-2516 [2] SPACER  
35. 5D-6081 [1] HOSE ASSEM. (58" Long Overall)  
36. 5D-7869 [1] PLATE ASSEM.  
  9F-2978 [1] NUT (Weld)  
    (Part of 5D7869 Plate Assem.)
37. 5D-7852 [1] BRACKET  
  0S-1594 [2] BOLT  
38. 5D-6082 [1] HOSE ASSEM. (53" Long Overall)  
  Y   SEPARATE ILLUSTRATION
 

#UE0700420249
 

5J-3580: STEERING VALVE GROUP

5J3580 STEERING VALVE GROUP--Part 1 of 2
Serial No. 23H1 to 23H954 inclusive
Part of Steering Lines shown on Page 127
c78325 UE070042
5J3580 STEERING 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. 0S-1587 [4] BOLT  
2. 3B-4508 [4] LOCKWASHER  
3. 4J-8638 [1] COVER  
4. 4J-7548 [1] SPACER  
5. 1J-8497 [1] VALVE  
6. [1] SPACER  
7. 4F-7115 [1] SPRING  
  3H-2549 [12] SHIM  
8. 4J-8633 [1] RETAINER  
9. 5J-9338 [1] SPRING  
10. 4J-8526 [1] WASHER  
11. 0S-1571 [2] BOLT  
12. 3B-4506 [6] LOCKWASHER  
  4J-7555 [1] BODY GROUP  
13. [1] BODY  
14. [1] STEM  
15. 4J-7543 [2] COVER  
16. 1A-2029 [4] BOLT  
17. 5J-3571 [1] BODY GROUP  
  [1] BODY  
18. [1] STEM  
19. [1] VALVE  
20. 4J-7549 [1] BOLT  
21. 3B-4506 [1] LOCKWASHER  
  1T-0689 [1] WASHER  
22. 4J-8634 [1] RETAINER  
23. 5J-4776 [1] SHIM (.005" Thick)  
  4J-8224 [3] SHIM (.010" Thick)  
24. 4J-9780 [1] PLUG  
    (Parts of 5J3571 Body Group)
 

Information:

Specifications
Steering Control Valve<BR> (8J2386)
621 & J621 WHEEL TRACTOR-SCRAPERS STEERING SYSTEM
Steering Control Valve<BR> (5J3580)
621 & J621 WHEEL TRACTOR-SCRAPERS STEERING SYSTEM
Inversion Valve<BR> (3S4904)
621 & J621 WHEEL TRACTOR-SCRAPERS AIR SYSTEM AND BRAKES
Safety Relief Valve<BR> (6B9664)
621 & J621 WHEEL TRACTOR-SCRAPERS AIR SYSTEM AND BRAKES
Pressure Protection Valve<BR> (6D918)
621 & J621 WHEEL TRACTOR-SCRAPERS AIR SYSTEM AND BRAKES
Control Valve For The Emergency Brake<BR> (7D2316)
621 & J621 WHEEL TRACTOR-SCRAPERS AIR SYSTEM AND BRAKES
Control Valve For The Retarder
621 WHEEL TRACTOR-SCRAPER POWER TRAIN
Steering Control Valve<BR> (8J2386)
621, 623 & 627 WHEEL TRACTOR-SCRAPERS STEERING SYSTEM (HYDRA
Reuse And Salvage Guidelines
Final Drive Steering System, Wheel Braking System, and Wheels & Tires Salvage and Reuse Manual Contents {4000, 4050, 4100, 4250, 4300}
Final Drive Steering System, Wheel Braking System, and Wheels & Tires Salvage and Reuse Manual Contents {4000, 4050, 4100, 4250, 4300}
Disassembly and Assembly
Steering Gear
621 TRACTOR-SCRAPER VEHICLE SYSTEMS
Steering Control Valve
621 TRACTOR-SCRAPER VEHICLE SYSTEMS
Steering Control Valve
J621 ELEVATING SCRAPER VEHICLE SYSTEMS
Selector Control Valve For Scraper Brakes
621 & 623 TRACTOR-SCRAPER POWER TRAIN
Brake Control Valve
621 & 623 TRACTOR-SCRAPER POWER TRAIN
Service Magazine
243-3133 Quick Connect Coupler (Fluid Sampling) Provides A Coupler for Portable Particle Analyzers {0707, 0717, 0731, 0732, 0738}
2004/07/05

Caterpillar Parts SIS Catalog 621 :

ROTOCHAMBERS, VALVE ASSEMBLIES AND LINES
ROTOCHAMBERS, VALVE ASSEMBLIES AND LINES
ROTOCHAMBERS, VALVE ASSEMBLIES AND LINES
ROTOCHAMBERS, VALVE ASSEMBLIES AND LINES
ROTOCHAMBERS, VALVE ASSEMBLIES AND LINES
ROTOCHAMBERS, VALVE ASSEMBLIES AND LINES
ROTOCHAMBERS, VALVE ASSEMBLIES AND LINES
ROTOCHAMBERS, VALVE ASSEMBLIES AND LINES
VALVE ASSEMBLIES AND LINES
VALVE ASSEMBLIES AND LINES
VALVE ASSEMBLIES AND LINES
VALVE ASSEMBLIES AND LINES
VALVE ASSEMBLIES AND LINES
VALVE ASSEMBLIES AND LINES
AIR TANKS, VALVE ASSEMBLIES AND LINES
AIR TANKS, VALVE ASSEMBLIES AND LINES
HORN GP-AIR
5D-6998 HORN GP-AIR
VALVE AS-HORN
3D-9943 VALVE AS-HORN
ROTOCHAMBER
3D-2119 ROTOCHAMBER
LINK GROUP
5D-6238 LINK GROUP
STEERING GEAR
STEERING GEAR
STEERING GEAR
STEERING GEAR
STEERING GEAR
STEERING GEAR
STEERING LINES
STEERING LINES

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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