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

8D6903 SUSPENSION SEAT GROUP Serial No. 45P1500, 1518, 1524, 1531, 1535, 1550, 1554, 1555, 1557, 1560, 1562, 1564, 1569, 1570, 1575, 1577, 1599 to 1601, 1605, 1606, 1608 to 1618, 1620 to 1633, 1635 to 1640, 1644, 1646, 1648 to 1658 and 45P1660 to 45P1943 inclusive 2G6470 Seat and 2G8720 Suspension parts are shown on Pages 142A-1, 143L and 143M 621B


OPERATOR STATION
SEAT GP

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

OPERATOR STATION

SEAT GP
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
 

#UEG0807S0620
 

8D-6903: SEAT GP-SUSPENSION

8D6903 SUSPENSION SEAT GROUP
Serial No. 45P1500, 1518, 1524, 1531, 1535, 1550, 1554, 1555, 1557, 1560, 1562, 1564, 1569, 1570, 1575, 1577, 1599 to 1601,
1605, 1606, 1608 to 1618, 1620 to 1633, 1635 to 1640, 1644, 1646, 1648 to 1658 and 45P1660 to 45P1943 inclusive
2G6470 Seat and 2G8720 Suspension parts are shown on Pages 142A-1, 143L and 143M
c212896 UEG0807S
8D6903 SEAT GP-SUSPENSION Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 2G-6470 Y [1] SEAT GROUP  
    (Separate Illustration)
2. 8D-6899 [1] SEAT BELT  
3. 8S-0933 [3] EYE BOLT  
  5B-3254 [3] NUT  
4. 3B-4507 [2] LOCKWASHER  
  4B-4279 [2] WASHER  
5. 9D-7079 [1] HOSE ASSEM.  
6. 2G-8720 YC [1] SUSPENSION GROUP  
    (Separate Illustration)
  1T-0765 [4] BOLT  
7. 6S-2289 [1] TEE  
8. 0S-1585 [4] BOLT  
  5P-1076 C [4] WASHER  
9. 9D-7078 [1] HOSE ASSEM.  
10. 9D-7081 [1] HOSE ASSEM.  
11. 5P-2618 [1] CONNECTOR  
  1J-9671 [1] SEAL  
12. 6K-9194 [5] ELBOW (swivel)  
13. 2P-7215 [3] ELBOW  
  2P-1279 [3] LOCKNUT  
14. 030-3978 [2] CONNECTOR  
  3J-7354 [1] SEAL  
15. 8D-6894 [1] WASHER  
16. 3B-4607 [3] COTTER PIN  
17. 9D-7058 [1] BELT  
18. 9D-7082 [1] HOSE ASSEM.  
19. 2R-6806 [2] CONNECTOR  
20. 3J-1907 [2] SEAL  
21. 9D-7077 [1] HOSE ASSEM.  
22. 3S-8664 [1] CLIP  
23. 030-7962 [1] ELBOW (swivel)  
24. 8K-4071 [1] HOSE ASSEM. 119.40 cm(47 in.)  
25. 8K-1684 [1] HOSE ASSEM. 81.30 cm(32 in.)  
  001-6498 [1] ELBOW  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#UEG0807S0621
 

8D-6903: SEAT GP-SUSPENSION

8D6903 SUSPENSION SEAT GROUP
Serial No. 45P1944 to 45P2002, 2005 & 45P2024 inclusive
6G150 Seat and 2G8720 Seat Suspension parts are shown on Pages 142A-2, 143L and 143M
c216534 UEG0807S
8D6903 SEAT GP-SUSPENSION Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 6G-0150 YC [1] SEAT GROUP  
    (Separate Illustration)
2. 8D-6899 [1] SEAT BELT  
    (Includes)
  2G-6654 C [1] SEAT BELT GROUP  
    (No servicable parts)
    -OR-
  2G-6653 C [1] SEAT BELT GROUP  
    (Includes)
  2G-6651 [1] PIN  
  9M-7611 [1] RING  
3. 8S-0933 [3] EYE BOLT  
  5B-3254 [3] NUT  
4. 3B-4507 [2] LOCKWASHER  
  4B-4279 [2] WASHER  
5. 9D-7079 [1] HOSE ASSEM.  
6. 2G-8720 Y [1] SUSPENSION GROUP  
    (Separate Illustration)
  1T-0765 [4] BOLT  
7. 6S-2289 [1] TEE  
8. 0S-1585 [4] BOLT  
  5P-1076 [4] WASHER  
9. 9D-7078 [1] HOSE ASSEM.  
10. 9D-7081 [1] HOSE ASSEM.  
11. 5P-2618 [1] CONNECTOR  
  1J-9671 [1] SEAL  
12. 6K-9194 [5] ELBOW (swivel)  
13. 2P-7215 [3] ELBOW  
  2P-1279 [3] LOCKNUT  
14. 030-3978 [2] CONNECTOR  
  3J-7354 [1] SEAL  
15. 8D-6894 [1] WASHER  
16. 3B-4605 C [3] COTTER PIN  
17. 9D-7058 [1] BELT  
18. 9D-7082 [1] HOSE ASSEM.  
19. 2R-6806 [2] CONNECTOR  
20. 3J-1907 [2] SEAL  
21. 9D-7077 [1] HOSE ASSEM.  
22. 3S-8664 [1] CLIP  
23. 030-7962 [1] ELBOW (swivel)  
24. 8K-4071 [1] HOSE ASSEM. 119.40 cm(47 in.)  
25. 8K-1684 [1] HOSE ASSEM. 81.30 cm(32 in.)  
  001-6498 [1] ELBOW  
26. 3F-9559 C [3] LOCKWASHER  
27. 5M-6213 C [1] PLUG  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#UEG0807S0622
 

8D-6903: SEAT GP-SUSPENSION

8D6903 SUSPENSION SEAT GROUP
Serial No. 45P2003, 2004 and 45P2025 to 45P2291 inclusive
6G150 Seat and 2G8720 Suspension Seat parts are shown on Pages 142A-2, 143L and 143M
c223676 UEG0807S
8D6903 SEAT GP-SUSPENSION Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 6G-0150 Y [1] SEAT GROUP  
    (Separate Illustration)
2. 8D-6899 [1] SEAT BELT GROUP  
3. 8S-0933 [3] EYE BOLT  
  5B-3254 [3] NUT  
4. 3B-4507 [2] LOCKWASHER  
  4B-4279 [2] WASHER  
5. 9D-7079 [1] HOSE ASSEM.  
6. 2G-8720 Y [1] SUSPENSION GROUP  
    (Separate Illustration)
  1T-0765 [4] BOLT  
7. 6S-2289 [1] TEE  
8. 0S-1585 [4] BOLT  
  5P-1076 [4] WASHER  
9. 9D-7078 [1] HOSE ASSEM.  
10. 9D-7081 [1] HOSE ASSEM.  
11. 5P-2618 [1] CONNECTOR  
  1J-9671 [1] SEAL  
12. 6K-9194 [5] ELBOW (swivel)  
13. 2P-7215 [3] ELBOW  
  2P-1279 [3] LOCKNUT  
14. 030-3978 [2] CONNECTOR  
  3J-7354 [1] SEAL  
15. 8D-6894 [1] WASHER  
16. 3B-4605 [3] COTTER PIN  
17. 9D-7058 [1] BELT  
18. 9D-7082 [1] HOSE ASSEM.  
19. 2R-6806 [2] CONNECTOR  
20. 3J-1907 [2] SEAL  
21. 9D-7077 [1] HOSE ASSEM.  
22. 3S-8664 [1] CLIP  
23. 030-7962 [1] ELBOW (swivel)  
24. 8K-4071 [1] HOSE ASSEM. 119.40 cm(47 in.)  
25. 8K-1684 [1] HOSE ASSEM. 81.30 cm(32 in.)  
  001-6498 [1] ELBOW  
26. 3F-9559 [3] LOCKWASHER  
27. 5M-6213 [1] PLUG  
  Y   SEPARATE ILLUSTRATION
 

#UEG0807S0623
 

8D-6903: SEAT GP-SUSPENSION

8D6903 SUSPENSION SEAT GROUP
Serial No. 45P2292-Up
6G150 Seat and 6G4330 Suspension parts are shown on Pages 140A-2 and 143Q
c313585 UEG0807S
8D6903 SEAT GP-SUSPENSION Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 6G-0150 Y [1] SEAT GROUP  
2. 8D-6899 [1] SEAT BELT GROUP  
3. 8S-0933 [3] EYE BOLT  
  5B-3254 [3] NUT  
4. 3B-4507 [2] LOCKWASHER  
  4B-4279 [2] WASHER  
5. 9D-7079 [1] HOSE AS.  
6. 6G-4330 CY [1] SUSPENSION GROUP  
  1T-0765 [4] BOLT  
7. 6S-2289 [1] TEE  
8. 0S-1585 [4] BOLT  
  5P-1076 [4] WASHER  
9. 9D-7078 [1] HOSE AS.  
10. 9D-7081 [1] HOSE AS.  
11. 5P-2618 [1] CONNECTOR  
  1J-9671 [1] SEAL  
12. 6K-9194 [5] ELBOW (SWIVEL)  
13. 2P-7215 [3] ELBOW  
  2P-1279 [3] LOCKNUT  
14. 030-3978 [2] CONNECTOR  
  3J-7354 [1] SEAL  
15. 8D-6894 [1] WASHER  
16. 3B-4605 [3] COTTER PIN  
17. 9D-7058 [1] BELT  
18. 9D-7082 [1] HOSE AS.  
19. 2R-6806 [2] CONNECTOR  
20. 3J-1907 [2] SEAL  
21. 9D-7077 [1] HOSE AS.  
22. 3S-8664 [1] CLIP  
23. 030-7962 [1] ELBOW (SWIVEL)  
24. 8K-4071 [1] HOSE AS. 119.40CM(47IN.)  
25. 8K-1684 [1] HOSE AS. 81.30CM(32IN.)  
  001-6498 [1] ELBOW  
26. 3F-9559 [3] LOCKWASHER  
27. 5M-6213 [1] PLUG  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#UEG0807S0624
 

9D-7019: SEAT GP

9D7019 SEAT GROUP
Serial No. 45P1 to 45P1200 inclusive
Part of 8D6903 Seat Suspension Group shown on
Pages 142, 142-1, 142-2 and 142-3
c157989 UEG0807S
9D7019 SEAT 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. 9L-8398 [7] BOLT  
2. 3D-9967 [1] CUSHION ASSEM.  
3. 5D-8587 [1] CUSHION ASSEM.  
 

#UEG0807S0625
 

2G-3320: SEAT VENT GROUP

2G3320 SEAT VENT GROUP
Serial No. 45P1 to 45P906 inclusive
c155957 UEG0807S
2G3320 SEAT VENT 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. 8H-7696 [1] FITTING  
2. 001-6498 [1] ELBOW  
3. 8K-1684 [1] HOSE ASSEM. 81.28 cm(32 in.)  
4. [1] ELBOW  
5. 2P-1279 [1] LOCKNUT  
6. 2P-7215 [1] ELBOW  
7. 8K-4071 [1] HOSE ASSEM. 119.38 cm(47 in.)  
8. 7D-5363 [1] CONNECTOR  
9. 053-0700 [1] TEE  
 

#UEG0807S0626
 

2G-6255: SEAT GROUP

2G6255 SEAT GROUP
Serial No. 45P1201 to 45P1252 inclusive
Part of 8D6903 Suspension Seat Group shown on Page 142-3
c208987 UEG0807S
2G6255 SEAT 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. 9L-8398 [7] BOLT  
2. 3D-9967 [1] CUSHION ASSEM.  
3. 5D-8587 [1] CUSHION ASSEM.  
 

#UEG0807S0627
 

2G-6470: BASIC SEAT GROUP

2G6470 BASIC SEAT GROUP
Serial No. 45P1253 to 45P1943 inclusive
Part of 8D6903 Suspension Seat Group shown on Pages 142-4 & 142-5
c160942 UEG0807S
2G6470 BASIC SEAT 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. 9L-8398 [7] BOLT  
2. 3D-9967 [1] CUSHION  
3. 5D-8587 [1] CUSHION  
 

#UEG0807S0628
 

6G-0150: SEAT GP

6G150 BASIC SEAT GROUP
Serial No. 45P1944-Up
Part of 8D6903 Suspension Seat Group shown on Pages 142-6 & 142-7
c215441 UEG0807S
6G0150 SEAT 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. 9L-8398 [7] BOLT  
2. 3D-9967 [1] CUSHION-BACK  
3. 6G-0178 [1] CUSHION-SEAT  
 

#UEG0807S0629
 

9D-4720: SEAT SUSPENSION GROUP

9D4720 SEAT SUSPENSION GROUP--Part 1 of 2--Type 1
Part of 8D6903 Suspension Seat Group shown on Page 142
c157467 UEG0807S
9D4720 SEAT SUSPENSION 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. 009-9258 [2] NUT  
2. 9D-9746 [2] ACTUATOR  
3. 9D-9739 [2] BEARING  
4. 2R-0364 [5] RING  
5. 8S-5820 [1] BREATHER  
6. 4H-0553 [1] FITTING  
7. 1D-4716 [2] NUT  
  3B-4505 [2] LOCKWASHER  
8. 0S-1614 [1] BOLT  
9. 9D-9747 [1] WASHER  
10. 1K-6872 [1] NUT  
  7K-5410 [1] SPACER .032 in. (0.83 mm)thick  
  4B-4280 [1] WASHER .095 in. (2.42 mm) thick  
11. 9D-9754 [1] RAIL ASSEM.  
    (Includes)
12. 9D-9741 [2] SPRING  
13. 9D-9742 [1] SPRING  
14. 9D-9743 [1] ROD  
15. 9L-2131 [1] SCREW  
16. 4B-4274 [1] WASHER  
17. 9D-9738 [1] SLIDE  
18. 9D-9734 [1] SPRING  
 

Information:

Special Instruction
Installation Procedure for the Caterpillar Advanced Ride Management (CARM) Seat Suspension Group on Certain Wheel Tractor-Scrapers{7312, 7324}
Installation Procedure for the Caterpillar Advanced Ride Management (CARM) Seat Suspension Group on Certain Wheel Tractor-Scrapers{7312, 7324}
Installation Instruction for 230-1394 Shock Absorber Kit (Extreme Duty) {7324}
Installation Instruction for 230-1394 Shock Absorber Kit (Extreme Duty) {7324}
Instructions for Operating the Caterpillar Advanced Ride Management (CARM) Seat{7312, 7324}
Instructions for Operating the Caterpillar Advanced Ride Management (CARM) Seat{7312, 7324}
Installation of Seat Belt Reminder Systems {1408, 1901, 1902, 7327, 7602, 7606, 7610, 7620}
Installation of Seat Belt Reminder Systems {1408, 1901, 1902, 7327, 7602, 7606, 7610, 7620}
Procedure To Rework The Seat Suspension Wiring On Certain Wheel Tractor-Scrapers{1408, 7324}
Procedure To Rework The Seat Suspension Wiring On Certain Wheel Tractor-Scrapers{1408, 7324}
Technical Information Bulletin
Seats With Arm Rests Need Spacer Bars When The Seat Suspension Is Replaced
Seats With Arm Rests Need Spacer Bars When The Seat Suspension Is Replaced
Operator Seat Belt Not Retracting {7327}
Operator Seat Belt Not Retracting {7327}
Systems Operation
Systems Operation
COACH & CAR AIRDRAULIC SEAT SYSTEM
Testing and Adjusting
Testing And Adjusting
COACH & CAR AIRDRAULIC SEAT SYSTEM
Disassembly and Assembly
Seat Belts
COACH & CAR AIRDRAULIC SEAT SYSTEM
Seat Cylinder
COACH & CAR AIRDRAULIC SEAT SYSTEM
Height Control Valve
COACH & CAR AIRDRAULIC SEAT SYSTEM
Suspension Seat
COACH & CAR AIRDRAULIC SEAT SYSTEM
Service Magazine
New Seat Suspension Group Has Improved Connection Between Cylinder Rod And Lever Arm{7324}
1980/03/24
Screen Assembly Now Used In Oil Line For Seat Suspension System{7324,7312}
1980/09/01
Different Elbows, Connectors, And Seals Give Stronger Junction In Oil Line For Seat Suspension System{7324,7312}
1981/01/19
Seat Suspension Accumulators Must Be Charged During Installation{7324}
1981/02/09
Troubleshooting Suspension Seat Oil Leaks{7324,7312,3179}
1981/04/06
Inspect And Clean Seat Suspension Screen Assembly{7324,7527,3179}
1981/04/13
New Liner Seat Insert Available{1217}
1983/08/15
New Ride Control Valve Used In Seat Suspension Group{7324}
1983/10/17
New Seat Suspension Valve Kit Has Improved Seals{7312,7324}
1985/04/08
New Suspension Seat Valve Gives A Better Ride{7324,7336}
1985/08/12
New Seat Suspension Cylinder Prevents Leaks{7324}
1985/11/25
New Seat Suspension Cylinder Prevents Leaks{7324}
1986/06/02
New Seat Suspension Group{7324}
1977/08/08
Improved Seat Cushion Now Used{7307,7312}
1977/09/26
New Liner Seat Insert Available{1201,1216,1217}
1988/11/14
Changes Made In Area Of Slide Rails On Seat Suspension Group{7324}
1979/01/15
Install New Valve In Seat Suspension Group If Fitting Is Removed From Valve Body{7324}
1979/03/26
Reconditioning Of Bridge Wear Seat Is Permitted; Will Prevent Bridge Replacement When Not Necessary{1121}
1990/04/30
New Suspension Seat Group, Actuator Valve Used{7324}
1991/02/25
New Liner Seat Inserts Available{1217}
1992/11/09
Seat Tethers Information and Locations{7324}
1995/10/16
Correction to Service Magazine , "New Slider Block Kit Improves Suspension Seat Ride" {7324}
2000/05/15
Correction to the Special Instruction for the Installation of the Seat Suspension {7312, 7324}
2000/12/25
A New Suspension Seat Improves Operator Comfort {7312, 7324}
2007/05/14
A Special Instruction, REHS1496, "Installation Instructions for the 230-1394 Shock Absorber Kit (Extreme Duty)" Is Available {7324}
2002/11/25
Longer Seat Belts Can Be Installed If Necessary {7327}
2005/09/19
New Caterpillar Advanced Ride Management (CARM) Seat Suspension is Now Available For Wheel Tractor-Scrapers {7312, 7324}
2012/05/21
New Caterpillar Advanced Ride Management (CARM) Seat Suspension Group With a Three Position Switch is Now Used on Certain Wheel Tractor-Scrapers {7312, 7324}
2013/02/14
A New Service Replacement Hose Is Now Available for Certain Seat Suspensions {7324}
A New Service Replacement Hose Is Now Available for Certain Seat Suspensions {7324}

Caterpillar Parts SIS Catalog 621B :

SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
ACCUMULATOR GP
3G-0725 ACCUMULATOR GP
CYLINDER GP-LOAD
8J-9446 CYLINDER GP-LOAD
CYLINDER GP-LOAD
8J-9446 CYLINDER GP-LOAD
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
SEAT GP-SUSPENSION
8D-6903 SEAT GP-SUSPENSION
SEAT GP
9D-7019 SEAT GP
SEAT VENT GROUP
2G-3320 SEAT VENT GROUP
SEAT GROUP
2G-6255 SEAT GROUP
BASIC SEAT GROUP
2G-6470 BASIC SEAT GROUP
SEAT GP
6G-0150 SEAT GP

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
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.