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3G2139 BASIC VANE PUMP GROUP--Type 1 Serial No. 45P1523-Up Part of 2G5925 Steering Vane Pump Group shown on Page 100G AN ATTACHMENT 621B


STEERING SYSTEM
PUMP GP
SERVICE EQUIPMENT AND SUPPLIES
CARTRIDGE KITS
STEERING SYSTEM
PUMP GP
VALVE GP

WHEEL TRACTOR 621B WHEEL TRACTOR 45P
 621B TRACTOR 45P00001-02711 (MACHINE) UEG0807S 621B 45P   (1973)

STEERING SYSTEM

PUMP GP
PUMP GP-STEERING VALVE
2G-5925 PUMP GP-STEERING VALVE
PLATE
3G-2139 PLATE
PUMP GP-VANE
3G-1239 PUMP GP-VANE
PUMP GP-VANE
3G-1239 PUMP GP-VANE
CARTRIDGE GP
3G-2834 CARTRIDGE GP
CARTRIDGE GP
3G-7656 CARTRIDGE GP
PUMP GP-SUPPLEMENTAL STEERING
2G-5955 PUMP GP-SUPPLEMENTAL STEERING
PUMP GP-GEAR
3G-1233 PUMP GP-GEAR
PUMP GP-GEAR
3G-1233 PUMP GP-GEAR
 

#UEG0807S0380
 

3G-2139: PLATE

3G2139 BASIC VANE PUMP GROUP--Type 1
Serial No. 45P1523-Up
Part of 2G5925 Steering Vane Pump Group shown on Page 100G
AN ATTACHMENT
c161526 UEG0807S
3G2139 PLATE Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4J-9225 J [1] RING  
2. 1H-5728 J [1] SEAL  
3. 2H-3928 J [1] SEAL  
4. 4J-9220 J [1] RING  
5. 2J-8163 J [1] SEAL  
6. 7J-0566 [1] CARTRIDGE ASSEM. (25 GPM)  
7. 5J-4502 R [1] CARTRIDGE ASSEM. (50 GPM)  
8. 2H-3935 J [1] SEAL  
9. 4J-9221 J [1] RING  
10. 5F-3106 J [1] SEAL  
11. 3J-7719 [1] RING  
12. 3L-1425 [1] BEARING  
13. 2J-7763 [1] WASHER  
14. 2J-7764 J [1] SEAL  
15. 9J-5151 J [1] SEAL  
16. 1J-6474 [1] RING  
17. 9J-5099 [1] SHAFT  
18. 4H-0407 [1] PLUG  
19. 4J-7781 [1] COVER  
20. 9J-5120 [1] BODY  
21. 1S-0668 J [1] RING  
22. 6H-3977 J [1] SEAL  
23. 8J-1578 [1] COVER ASSEM.  
    (Includes)
24. 7J-4076 [8] DAMPER  
25. 4J-7945 [4] BOLT  
    THE FOLLOWING REPAIR KIT IS AVAILABLE:
  9J-5108 [1] KIT  
    (Consists of All Parts Marked J)
  R   REMFG PART MAY BE AVAILABLE
 

#UEG0807S0381
 

3G-1239: PUMP GP-VANE

3G1239 BASIC VANE PUMP GROUP--Type 2
Serial No. 45P1523-Up. Part of 2G5925 Steering Vane Pump Group shown on Page 100G
3G2834 and 3G2233 Cartridge parts are shown on Pages 100H-2 and 127D. AN ATTACHMENT
c165254 UEG0807S
3G1239 PUMP GP-VANE Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3G-2834 RC [1] CARTRIDGE ASSEM. (25 GPM)  
2. 3G-2233 YC [1] CARTRIDGE ASSEM. (50 GPM)  
    (Separate Illustration)
3. 3J-7719 [1] RING  
4. 3L-1425 [1] BEARING  
5. 2J-7763 [1] WASHER  
6. 2J-7764 [1] SEAL  
7. 9J-5151 [1] SEAL  
8. 1J-6474 [1] RING  
9. 9J-5099 [1] SHAFT  
10. 3G-2632 C [1] PLUG  
11. 9J-5120 [1] BODY  
12. 8J-1578 [1] COVER ASSEM.  
    (Includes)
13. 7J-4076 [8] DAMPER  
14. 4J-7781 [1] COVER  
15. 4J-7945 [4] BOLT  
  R   REMFG PART MAY BE AVAILABLE
  Y   SEPARATE ILLUSTRATION
  C   INDICATES CHANGE
 

#UEG0807S0382
 

3G-1239: PUMP GP-VANE

3G1239 BASIC VANE PUMP GROUP--Type 3
Serial No. 45P1523-Up. Part of 2G5925 Steering Vane Pump Group shown on Page 100G
3G2834 & 3G7656 Cartridge parts are shown on Page 100H-2. AN ATTACHMENT
c179134 UEG0807S
3G1239 PUMP GP-VANE Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  3G-2834 RY [1] CARTRIDGE ASSEM. 95 LPM(25 GPM)  
    (Separate Illustration)
  3G-7656 RYC [2] CARTRIDGE ASSEM. 189 LPM(49.92 GPM)  
    (Separate Illustration)
  3J-7719 [3] RING  
  3L-1425 [4] BEARING  
  2J-7763 [5] WASHER  
  5P-0904 [6] SEAL  
  6V-2318 C [7] SEAL  
  1J-6474 [8] RING  
  9J-5099 [9] SHAFT  
  3G-7242 C [10] PLUG  
  1U-3968 C [11] BODY  
  8J-1578 [12] COVER ASSEM.  
    (Includes)
  7J-8080 [13] DAMPER  
  4J-7781 [14] COVER  
  4J-7945 [15] BOLT  
    THE FOLLOWING REPAIR KITS ARE AVAILABLE:
  1U-0380 C [1] FLEX PLATE KIT (small)  
  1U-0381 C [1] FLEX PLATE KIT (large)  
  R   REMFG PART MAY BE AVAILABLE
  Y   SEPARATE ILLUSTRATION
  C   INDICATES CHANGE
 

#UEG0807S0383
 

3G-2834: CARTRIDGE GP

3G2834 CARTRIDGE GROUP--25 GPM--Clockwise
Serial No. 45P1523-Up
Part of 3G1239 Basic Vane Pump Group shown on Page 100H-1
c213346 UEG0807S
3G2834 CARTRIDGE GP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3G-1264 [4] RETAINER  
2. 3G-1265 [4] SEAL  
3. 2J-8163 [1] SEAL  
4. 3G-1820 [1] SEAL  
5. 4J-9225 [1] RING  
6. 1H-5728 [1] SEAL  
 

#UEG0807S0384
 

3G-7656: CARTRIDGE GP

3G7656 CARTRIDGE GROUP--189 L/Min (50 GPM)
Serial No. 45P1523-Up. Part of 3G1239 Vane Pump Group shown on Page 100H-1b
AN ATTACHMENT
c176660 UEG0807S
3G7656 CARTRIDGE GP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3G-2241 [4] RETAINER  
2. 3G-9201 [4] SEAL  
3. 6V-1195 [1] SEAL  
4. 3G-2242 [1] SEAL  
5. 6V-1558 [1] RING  
6. 6V-1179 [1] SEAL  
 

#UEG0807S0385
 

2G-5955: PUMP GP-SUPPLEMENTAL STEERING

2G5955 STEERING PUMP GROUP
Serial No. 45P1523-Up
Part of 2G5996 Supplemental Steering Arrangement listed on Page 100F
3G1233 Gear Pump parts are shown below
c228131 UEG0807S
2G5955 PUMP GP-SUPPLEMENTAL STEERING Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 2D-6417 [1] RING  
2. 9S-3581 [2] CUP  
  9S-3582 [2] CONE  
3. 9D-1139 [1] SHAFT  
4. 9D-1141 [8] SHIM  
5. 5S-3676 [1] SEAL  
6. 3D-8352 [1] RING  
7. 9D-1138 [1] COUPLING  
8. 9D-0938 [1] ADAPTER  
9. 0S-1566 [2] BOLT  
  3B-4510 [2] LOCKWASHER  
10. 3G-1233 Y [1] PUMP GROUP  
    (Separate Illustration)
11. 5F-3999 [1] SEAL  
12. 9D-0642 [1] CAGE  
13. 5D-0353 C [4] BOLT  
  5M-2894 C [4] WASHER  
14. 9D-0906 [1] PINION  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#UEG0807S0386
 

3G-1233: PUMP GP-GEAR

3G1233 BASIC GEAR PUMP GROUP--Type 1
Serial No. 45P1523-Up
Part of 2G5955 Steering Pump Group
c226544 UEG0807S
3G1233 PUMP GP-GEAR Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 8F-4271 [8] STUD  
2. 8H-5724 [16] NUT  
  6J-2391 [16] WASHER  
3. 5S-1522 [2] RING  
4. 3G-1741 [1] COUPLING  
5. 9J-5654 [2] SEAL  
6. 9J-9841 [1] PLUG  
7. 3G-1280 [1] SPACER  
8. 1A-2360 [8] STUD  
    THE FOLLOWING REPAIR KITS ARE AVAILABLE:
  3G-2279 C [1] SECTION KIT (front)  
  C [1] SECTION KIT (rear)  
  3G-2278 C [1] SEAL KIT  
  C   INDICATES CHANGE
 

#UEG0807S0387
 

3G-1233: PUMP GP-GEAR

3G1233 BASIC GEAR PUMP GROUP--Type 2
Serial No. 45P1523-Up
Part of 2G5955 Steering Pump Group shown on Page 100J
c236623 UEG0807S
3G1233 PUMP GP-GEAR Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 8F-4271 [8] STUD  
2. 8H-5724 [16] NUT  
  6J-2391 [16] WASHER  
3. 5S-1522 C [2] RING-SNAP  
4. 3G-1741 C [1] COUPLING  
5. 6V-1899 C [2] SEAL-LIP TYPE  
6. 3G-7242 C [1] PLUG  
7. 3G-1280 [1] SPACER  
8. 1A-2360 [8] STUD  
   
    THE FOLLOWING REPAIR
    KITS ARE AVAILABLE:
  3G-2279 [1] KIT-FRONT SECTION  
  3G-2280 C [1] KIT-REAR SECTION  
  3G-1745 C [1] KIT-SEAL  
  4T-0471 C [1] KIT-SETSCREW  
  C   CHANGE FROM PREVIOUS TYPE
 

#UEG0807S0388
 

1U-0325: VALVE GP-STEERING

1U325 STEERING VALVE GROUP
Serial No. 45P1523-Up
Part of 8D8030 Steering Lines Group shown on Pages 100C-4, 100C-8 & 100C-11
1U324 Valve parts are shown on Page 104A
c224194 UEG0807S
1U0325 VALVE GP-STEERING Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4K-4114 [1] SEAL  
2. 4J-7546 [1] PILOT  
3. 0S-1587 [4] BOLT  
4. 9S-0201 [2] WASHER  
5. 7J-8056 [1] COVER  
6. 4J-0522 [1] SEAL  
7. 5F-1678 [1] SEAL  
8. 3G-1725 [1] SPACER  
9. 3J-7473 [1] SHIM 0.13 mm(.005 in.) thick  
10. 9S-8006 [1] PLUG  
  2M-9780 [1] SEAL  
11. 9S-4191 [2] PLUG  
12. 3J-1907 [2] SEAL  
13. 2J-6088 [1] SPRING (outer)  
14. 4J-7490 [1] SPRING (inner)  
15. 9S-8002 [1] PLUG  
  3J-7354 [1] SEAL  
16. 4J-0519 [1] SEAL  
17. 9J-7795 [1] VALVE GROUP  
    (Includes)
18. [1] SEAL  
19. 2J-6089 [1] SPRING  
20. 8J-2324 [1] COVER  
21. 0S-1585 [2] BOLT  
22. 9S-4187 [1] PLUG  
  3K-0360 [1] SEAL  
  3H-2549 [4] SHIM 0.26 mm(.010 in.) thick  
23. 6F-0711 [1] SEAL  
24. 5F-8000 [2] SEAL  
25. 4K-4937 [2] BOLT  
26. 8J-2323 [1] RETAINER  
27. 5J-9338 [1] SPRING  
28. 4J-5309 [3] SEAL  
29. 7J-2927 [1] WASHER  
30. 1U-0324 Y [1] VALVE GROUP  
    (Separate Illustration)
  Y   SEPARATE ILLUSTRATION
 

#UEG0807S0389
 

9J-1780: STEERING VALVE GROUP

9J1780 STEERING VALVE GROUP
Serial No. 45P1 to 45P1522 inclusive
Part of 8D8030 Steering Lines Group shown on Pages 98, 100A and 100C-1
8J1929 Valve parts are shown on Page 104
c201274 UEG0807S
9J1780 STEERING VALVE GROUP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4K-4114 [1] SEAL  
2. 4J-7546 [1] PILOT  
3. 0S-1587 [4] BOLT  
4. 3B-4508 [8] LOCKWASHER  
5. 7J-8056 [1] COVER  
6. 4J-0522 [1] SEAL  
7. 5F-1678 [1] SEAL  
8. 7J-8055 [1] SPACER  
9. 3J-7473 [1] SHIM (.005 in. thick)  
10. 7B-3028 [1] SCREW  
11. 9S-4191 [2] PLUG  
12. 3J-1907 [2] SEAL  
13. 2J-6088 [1] SPRING (Outer)  
14. 4J-7490 [1] SPRING (Inner)  
15. 9S-8002 [1] PLUG  
  3J-7354 [1] SEAL  
16. 4J-0519 [1] SEAL  
17. [1] SEAT  
18. 1J-8497 [1] VALVE  
19. 2J-6089 [1] SPRING  
20. 8J-2324 [1] COVER  
21. 0S-1585 [2] BOLT  
22. 9S-4187 [1] PLUG  
  3K-0360 [1] SEAL  
  3H-2549 [4] SHIM (.010 in. thick)  
23. 6F-0711 [1] SEAL  
24. 5F-8000 [2] SEAL  
25. 9S-1366 [2] BOLT  
26. 8J-2323 [1] RETAINER  
27. 5J-9338 [1] SPRING  
28. 4J-5309 [3] SEAL  
29. 7J-2927 [1] WASHER  
30. 8J-1929 Y [1] VALVE GROUP  
    (Separate Illustration)
31. 9S-8006 [1] PLUG  
  2M-9780 [1] SEAL  
  Y   SEPARATE ILLUSTRATION
 

Information:

Special Instruction
Installation Of Supplemental Steering Pump Arrangements{4306}
Installation Of Supplemental Steering Pump Arrangements{4306}
Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070}
Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070}
Nexus Gear Pump Porting{5073}
Nexus Gear Pump Porting{5073}
Repair Process for Hydraulic Gear Pumps {5073}
Repair Process for Hydraulic Gear Pumps {5073}
Test Specifications for Vane Cartridges{0784, 5058, 5070}
Test Specifications for Vane Cartridges{0784, 5058, 5070}
Vane Type Hydraulic Pump Identification Guidelines {5055}
Vane Type Hydraulic Pump Identification Guidelines {5055}
Specifications
Hydraulic Pump; For Implement (Bowl); And Steering (621B Std.)
621B, 623B & 627B WHEEL TRACTORS STEERING SYSTEM
Hydraulic Pump; For Elevator And Steering (623B Std.)
621B, 623B & 627B WHEEL TRACTORS STEERING SYSTEM
Hydraulic Pump For; Implement (Bowl) And Steering
621B, 623B & 627B WHEEL TRACTORS STEERING SYSTEM
Supplemental Steering: Hydraulic Pump And Valve (Optional)<BR> (3G1233)
621B, 623B & 627B WHEEL TRACTORS STEERING SYSTEM
9J5075, 8J6178 Hydraulic Pump<BR> (For 621B Tractor)
621B & 627B SCRAPERS HYDRAULIC SYSTEM
9J5135, 9J5649 Hydraulic Pump<BR> (For 627B Tractor)
621B & 627B SCRAPERS HYDRAULIC SYSTEM
Tool Operating Manual
Replacing Sleeve Bearings in Tyrone Gear Pumps and Motors (Used on Series 7 and 8, Iron and Aluminum Housings){0738, 5061, 5073, 7551}
Replacing Sleeve Bearings in Tyrone Gear Pumps and Motors (Used on Series 7 and 8, Iron and Aluminum Housings){0738, 5061, 5073, 7551}
Reuse And Salvage Guidelines
Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070}
Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070}
Repair Process for Hydraulic Gear Pumps {5073}
Repair Process for Hydraulic Gear Pumps {5073}
Specifications and Reusability for Hydraulic Gear Pumps and Motors (Groups 1, 2, and 3) {5061, 5073}
Specifications and Reusability for Hydraulic Gear Pumps and Motors (Groups 1, 2, and 3) {5061, 5073}
Specifications and Reusability for Hydraulic Gear Pumps and Motors (Groups 4, 5, and 6) {5061, 5073}
Specifications and Reusability for Hydraulic Gear Pumps and Motors (Groups 4, 5, and 6) {5061, 5073}
Removing and Installing Bushings and Pressure Plates in Hydraulic Gear Pumps {5073}
Removing and Installing Bushings and Pressure Plates in Hydraulic Gear Pumps {5073}
Vane Type Hydraulic Pump Identification Guidelines {5055}
Vane Type Hydraulic Pump Identification Guidelines {5055}
General Reuse and Salvage Guideline for Hydraulic Piston Pumps and Motors {5058, 5070}
General Reuse and Salvage Guideline for Hydraulic Piston Pumps and Motors {5058, 5070}
Information Release Memo
CAT REMAN EXPANDS HYD GEAR &amp; PISTON PUMP &amp; MOTOR OPTIONS
CAT REMAN EXPANDS HYD GEAR & PISTON PUMP & MOTOR OPTIONS
Bench Test Procedures
Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070}
Rotating Group Adjustment Instructions for Bosch Rexroth Hydraulic Pumps and Motors {3203, 4351, 5058, 5070}
Bench Test Procedure for Gear Pumps {5073}
Bench Test Procedure for Gear Pumps {5073}
Disassembly and Assembly
Elevator And Implement Pump
621B & 623B TRACTORS POWER TRAIN
Elevator And Steering Pump
621B & 623B TRACTORS POWER TRAIN
Elevator And Steering Pump
621B & 623B TRACTORS POWER TRAIN
Implement Hydraulic Pump
621 B & 627B TRACTOR-SCRAPER VEHICLE SYSTEMS
Service Magazine
Speed Adjustment Screw For Supplemental Steering Pump Changed {4324}
1981/11/02
New Flow Switches Used On Machines With Supplemental Steering{4324}
1984/10/08
New Cushion-Hitch Pump Available{5050,5073,5300,5316}
1985/03/18
New Oil Pump Gears Used {1304}
1986/07/07
New Shaft Seal Plug Improves Performance Of Vane Pump Group{5055}
1996/03/04

Caterpillar Parts SIS Catalog 621B :

PUMP GP-STEERING VALVE
2G-5925 PUMP GP-STEERING VALVE
VALVE GP-RELIEF
3G-6473 VALVE GP-RELIEF
2G-5996 STEERING AR-SUPPLEMENTAL
LINES GP-SUPPLEMENTAL STEERING
2G-5965 LINES GP-SUPPLEMENTAL STEERING
LINES GP-SUPPLEMENTAL STEERING
2G-5965 LINES GP-SUPPLEMENTAL STEERING
LINES GP-SUPPLEMENTAL STEERING
2G-5965 LINES GP-SUPPLEMENTAL STEERING
VALVE GP
3G-7594 VALVE GP
PRESSURE REDUCING VALVE ASSEMBLY
9J-5503 PRESSURE REDUCING VALVE ASSEMBLY
PUMP GP-VANE
3G-1239 PUMP GP-VANE
PUMP GP-VANE
3G-1239 PUMP GP-VANE
CARTRIDGE GP
3G-2834 CARTRIDGE GP
CARTRIDGE GP
3G-7656 CARTRIDGE GP
PUMP GP-SUPPLEMENTAL STEERING
2G-5955 PUMP GP-SUPPLEMENTAL STEERING
PUMP GP-GEAR
3G-1233 PUMP GP-GEAR
PUMP GP-GEAR
3G-1233 PUMP GP-GEAR
VALVE GP-STEERING
1U-0325 VALVE GP-STEERING

Truck sale:

Caterpillar 621B
 
Caterpillar 621B
- Road Scraper
MACALLISTER MACHINERY CO., INC
Caterpillar 621B
 
Caterpillar 621B
- Road Scraper
MACALLISTER MACHINERY CO., INC
Caterpillar 621B
 
Caterpillar 621B
- Road Scraper
FINNING CANADA
Caterpillar 621B, Road Scraper, Construction
46,500 
Caterpillar 621B, Road Scraper, Construction
- Road Scraper
QUINN COMPANY
Caterpillar 621B, Road Scraper, Construction
46,500 
Caterpillar 621B, Road Scraper, Construction
- Road Scraper
QUINN COMPANY
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