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3G6904 STEERING SERVO-SENDER CYLINDER GROUP (CHANGE 0-2)-38 MM (1.5") BORE X 239 MM (9.40") STROKE. 3G6473 VALVE PARTS ARE SHOWN ON PAGE 175 639D


STEERING SYSTEM
CYLINDER GP
BRAKING SYSTEM
VALVE GP
STEERING SYSTEM
CYLINDER GP
PUMP GP
FRAME AND BODY
GUARD GP
HOOD GP

WHEEL TRACTOR 639D WHEEL TRACTOR 99X
 639D TRACTOR / POWER SHIFT / 99X00001-UP (MACHINE) POWERED BY 3408 ENGINE SEBP1259 639D 99X   (1979)

STEERING SYSTEM

CYLINDER GP
STEERING CYLINDER LINES GROUP
1U-2383 STEERING CYLINDER LINES GROUP
CYLINDER GP-STEERING
3G-7607 CYLINDER GP-STEERING
CYLINDER GP-STEERING
3G-6904 CYLINDER GP-STEERING
CYLINDER & MOUNTING GP
8D-6900 CYLINDER & MOUNTING GP
CYLINDER & MOUNTING GP
8D-6900 CYLINDER & MOUNTING GP
CYLINDER GP-SERVO STEERING
9J-8774 CYLINDER GP-SERVO STEERING
CYLINDER GP
4T-7819 CYLINDER GP
 

#SEBP12590460
 

3G-6904: CYLINDER GP-STEERING

3G6904 STEERING SERVO-SENDER CYLINDER GROUP (CHANGE 0-2)-38 MM (1.5") BORE
X 239 MM (9.40") STROKE. 3G6473 VALVE PARTS ARE SHOWN ON PAGE 175
c521925 SEBP1259
3G6904 CYLINDER GP-STEERING Parts scheme
  For full view, you need register

Parts for your 639D WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5J-8957 R [1] ROD AS  
2. 3H-5823 [2] RING-RETAINER  
3. 5P-9962 [1] BEARING-ALIGNING  
4. 6J-1879 [1] WIPER-ROD  
5. 6J-1878 C [1] SEAL  
6. 8M-8157 [2] SEAL  
7. 9S-8001 [2] PLUG-O-RING  
  4J-7533 [2] SEAL-O-RING  
8. 5J-8774 [1] HEAD  
9. 0S-1571 [4] BOLT  
10. 3G-6473 Y [1] VALVE GP-RELIEF  
11. 5J-8792 [1] HEAD AS  
12. 5P-9962 [1] BEARING-ALIGNING  
13. 3H-5823 [2] RING-RETAINER  
14. 1A-2029 C [4] BOLT  
15. 4J-0521 [2] SEAL-O-RING  
16. 6V-5729 [1] LOCKNUT  
17. 5J-9073 [1] RING-WEAR  
18. 5J-9822 [2] SEAL AS  
19. 5J-9072 [1] PISTON  
20. 5J-8335 [1] BODY-CYLINDER  
21. 5J-8773 [1] RETAINER  
22. 3B-1915 C [4] BOLT  
23. 9S-4182 [1] PLUG  
  3J-7354 [1] SEAL-O-RING  
  C   CHANGE FROM PREVIOUS TYPE
  R   REMFG PART MAY BE AVAILABLE
  Y   SEPARATE ILLUSTRATION
 

#SEBP12590461
 

8D-6900: CYLINDER & MOUNTING GP

8D6900 STEERING SERVO-RECEIVER CYLINDER & MOUNTING GROUP
SERIAL NO. 99X1 TO 99X710 INCLUSIVE
9J8774-PAGE 176
c156662 SEBP1259
8D6900 CYLINDER & MOUNTING GP Parts scheme
  For full view, you need register

Parts for your 639D WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 0S-1585 [4] BOLT  
  3B-4508 [4] LOCKWASHER  
2. 8D-6059 [1] SUPPORT  
3. 2G-2413 C [2] PIN  
  4B-4283 C [2] WASHER  
4. 3B-4629 C [2] COTTER  
  6D-0082 [4] SPACER  
5. 9J-8774 Y [1] CYLINDER GROUP  
    (Separate Illustration)
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#SEBP12590462
 

3G-6473: VALVE GP-RELIEF

3G6473 RELIEF VALVE GROUP
PART OF 3G6904 STEERING CYLINDER GROUP SHOWN ON PAGE 174
c344656 SEBP1259
3G6473 VALVE GP-RELIEF Parts scheme
  For full view, you need register

Parts for your 639D WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3G-6472 [1] BODY AS  
2. 5J-7157 [2] VALVE  
3. 6J-1833 [2] PLUG  
4. 6J-1832 CB [26] SHIM  
5. 8M-4435 [2] SEAL  
6. 8M-4438 [2] SEAL-O-RING  
7. 5J-8004 [2] SPRING  
8. 3G-6470 [2] RETAINER  
9. 2D-6642 [2] BALL  
    MARY
  B   USE AS REQUIRED
  C   CHANGE FROM PREVIOUS TYPE
 

#SEBP12590463
 

8D-6900: CYLINDER & MOUNTING GP

8D6900 STEERING SERVO-RECEIVER CYLINDER & MOUNTING GROUP
SERIAL NO. 99X711-UP
4T7819-PAGE 176A
c324368 SEBP1259
8D6900 CYLINDER & MOUNTING GP Parts scheme
  For full view, you need register

Parts for your 639D WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5K-7143 C [4] BOLT  
  5P-8245 C [4] WASHER  
2. 8D-6059 C [1] SUPPORT  
3. 2G-2413 C [2] PIN  
  4B-4283 C [2] WASHER  
4. 3B-4629 C [2] PIN-COTTER  
  6D-0082 C [4] SPACER  
5. 4T-7819 CY [1] CYLINDER GP  
  C   CHANGE FROM PREVIOUS TYPE
  Y   SEPARATE ILLUSTRATION
 

#SEBP12590464
 

9J-8774: CYLINDER GP-SERVO STEERING

9J8774 STEERING SERVO-RECEIVER CYLINDER GROUP (CHANGE 0-1)-51 MM (2") BORE
X 127 MM (5") STROKE
SERIAL NO. 99X1 TO 99X710 INCLUSIVE
PART OF 8D6900 STEERING CYLINDER & MOUNTING
c226116 SEBP1259
9J8774 CYLINDER GP-SERVO STEERING Parts scheme
  For full view, you need register

Parts for your 639D WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5J-7945 [1] ROD ASSEM.  
    (Includes)
2. 5P-9962 C [1] BEARING  
3. 3H-5823 [2] RING  
4. 6J-0934 [4] BOLT  
5. 3B-4506 [4] LOCKWASHER  
6. 6J-1890 [1] WIPER  
7. 9J-8773 [1] HEAD ASSEM.  
    (Includes)
8. 5J-7884 [1] SEAT  
9. 7B-6368 [1] BALL  
10. 9J-8733 [1] SPRING  
  9J-8734 [1] RETAINER  
11. 5J-7915 [1] TUBE  
12. 5J-7914 [1] PISTON  
13. 5J-7942 [1] RING  
14. 4F-7952 [2] RING  
15. 9J-8772 [1] HEAD ASSEM.  
    (Includes)
16. 5J-7884 [1] SEAT  
17. 7B-6368 [1] BALL  
18. 5P-9962 C [1] BEARING  
19. 3H-5823 [2] RING  
20. 9J-8733 [1] SPRING  
  9J-8734 [1] RETAINER  
21. 1S-0670 [2] RING  
22. 1H-9696 [2] SEAL  
23. 2H-3788 [1] NUT  
24. 5J-7004 [2] SEAL ASSEM.  
25. 6J-1889 [1] SEAL  
26. 5J-7943 [1] RETAINER  
  C   INDICATES CHANGE
 

#SEBP12590465
 

4T-7819: CYLINDER GP

4T7819 STEERING SERVO-RECEIVER CYLINDER GROUP-(CHG 0-1)-51 MM (2") BORE X
127 MM (5") STROKE
SERIAL NO. 99X711-UP
PART OF 8D6900 STEERING SERVO-RECEIVER CYLINDER & MOUNTING
4T7930-PAGE 176B
c324369 SEBP1259
4T7819 CYLINDER GP Parts scheme
  For full view, you need register

Parts for your 639D WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5J-7945 [1] ROD AS  
2. 5P-9962 [1] BEARING-ALIGNING  
3. 3H-5823 [2] RING-RETAINER  
4. 6J-0934 [4] BOLT  
5. 5M-2894 [4] WASHER  
6. 6J-1890 [1] WIPER-ROD  
7. 4T-7930 Y [2] CARTRIDGE GP  
8. 5J-8122 [1] HEAD  
9. 5J-7915 [1] TUBE  
10. 5J-7914 [1] PISTON  
11. 5J-7942 [1] RING-WEAR  
12. 4F-7952 [2] SEAL-O-RING  
13. 5J-8119 [1] HEAD-BASE END  
14. 5P-9962 [1] BEARING-ALIGNING  
15. 3H-5823 [2] RING-RETAINER  
16. 1S-0670 [2] RING-BACK-UP  
17. 1H-9696 [2] SEAL-O-RING  
18. 2H-3788 [1] NUT-SELF LOCKING  
19. 5J-7004 [2] SEAL AS  
20. 6J-1889 [1] SEAL-U-CUP  
21. 5J-7943 [1] RETAINER  
  Y   SEPARATE ILLUSTRATION
 

#SEBP12590466
 

4T-7930: CARTRIDGE GP

4T7930 CARTRIDGE GROUP-STEERING SERVO-RECEIVER CYLINDER
SERIAL NO. 99X00711-UP
PART OF 4T7819 STEERING SERVO-RECEIVER CYLINDER
c324370 SEBP1259
4T7930 CARTRIDGE GP Parts scheme
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Parts for your 639D WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3D-8358 [1] RING  
2. 9J-8733 [1] SPRING  
3. 4T-7929 [1] CARTRIDGE  
4. 3K-0360 [1] SEAL  
5. 4B-9782 [1] BALL  
6. 9J-8734 [1] RETAINER  
7. 1U-4059 [1] SPACER  
 

#SEBP12590467
 

6G-2980: GUARD GP-RADIATOR

6G2980 RADIATOR GUARD GROUP
SERIAL NO. 99X1 TO 99X699 INCLUSIVE
c174215 SEBP1259
6G2980 GUARD GP-RADIATOR Parts scheme
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Parts for your 639D WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 9D-2997 [1] PLATE ASSEM.  
    (Includes)
  6B-4594 [9] RIVET  
2. 6G-2961 [1] SUPPORT ASSEM.  
    (Includes)
  3S-5275 [1] BLOCK  
3. 3K-7648 [1] SHAFT  
  2D-8641 [1] PIN  
4. 4M-7406 [2] GUSSET  
5. 9D-3002 [1] PLATE ASSEM.  
    (Includes)
  6B-4594 [8] RIVET  
6. 5D-0353 [31] BOLT  
7. 5M-2894 [39] WASHER  
8. 2G-2532 [2] BRACKET ASSEM.  
9. 7K-4370 [8] BOLT  
  9D-6134 [8] SPACER  
10. 6G-2964 [1] GUARD  
11. 6G-2840 [2] BRACKET ASSEM.  
12. 5K-9107 [8] BOLT  
13. 031-0223 [4] BOLT  
  1S-4305 [4] WASHER  
 

#SEBP12590468
 

6G-2980: GUARD GP-RADIATOR

6G2980 RADIATOR GUARD GROUP
SERIAL NO. 99X700-UP
c329620 SEBP1259
6G2980 GUARD GP-RADIATOR Parts scheme
  For full view, you need register

Parts for your 639D WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 9D-2997 [1] PLATE AS  
  6B-4594 [9] RIVET  
2. 5T-0909 C [1] SUPPORT AS  
3. 5P-8245 C [4] WASHER  
4. 9L-9132 C [16] WASHER  
5. 9D-3002 [1] PLATE AS  
  6B-4594 [8] RIVET  
6. 5D-0353 [31] BOLT-SELF LOCKING  
7. 5M-2894 C [23] WASHER  
8. 2G-2532 [2] BRACKET AS  
9. 6K-0137 C [8] BOLT-SELF LOCKING  
  3K-3052 C [8] SPACER  
10. 6G-2964 [1] GUARD  
11. 6G-2840 [2] BRACKET AS  
12. 5K-9107 [8] BOLT-SELF LOCKING  
13. 031-0223 [4] BOLT-SELF LOCKING  
  1S-4305 [4] WASHER  
  C   CHANGE FROM PREVIOUS TYPE
 

#SEBP12590469
 

9D-4980: HOOD GP

9D4980 HOOD GROUP-PART 1
SERIAL NO. 99X1 TO 99X685 INCLUSIVE
c225962 SEBP1259
9D4980 HOOD GP Parts scheme
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Parts for your 639D WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 030-8538 C [6] BOLT  
2. 5P-8245 C [6] WASHER  
3. 9M-3914 [4] BEARING  
4. 3B-4629 [2] COTTER PIN  
5. 2G-8254 [1] PLATE  
6. 2G-8253 [2] ROD ASSEM.  
    (Each Includes)
  0L-1319 [1] WASHER 31.75mm(1.25 in.)O.D.  
  2D-6005 [1] WASHER 19.1mm(.75 in.)O.D.  
7. 2G-8263 [4] BRACKET  
8. 5D-0353 C [24] BOLT  
9. 2G-7857 [1] PLATE  
10. 6N-8863 C [18] WASHER 32 mm(1.26 in.)O.D.  
11. 9D-7901 [1] HOOD ASSEM.  
    (Includes)
12. 9F-2978 [12] NUT  
13. 4B-5273 [1] WASHER  
14. 5M-2894 C [10] WASHER 18.5 mm(.728 in.)O.D.  
15. 2G-2392 [1] PLATE ASSEM.  
    (Includes)
  3S-5275 [1] BLOCK  
16. 3K-7648 [1] SHAFT  
17. 2S-8641 [1] PIN  
18. 9F-2978 [4] NUT  
19. 9D-7902 [1] HOOD ASSEM.  
    (Includes)
  9F-2978 [8] NUT  
20. 4B-5273 [1] WASHER  
21. 3B-4615 [4] COTTER PIN  
  C   INDICATES CHANGE
 

Information:

Caterpillar Parts SIS Catalog 639D :

CYLINDER GP-STEERING
3G-7607 CYLINDER GP-STEERING
STEERING CYLINDER LINES GROUP
1U-2383 STEERING CYLINDER LINES GROUP
VALVE GP-CHECK
9J-3383 VALVE GP-CHECK
LINES GP-SUPPLEMENTAL STEERING
6G-2230 LINES GP-SUPPLEMENTAL STEERING
LINES GP-SUPPLEMENTAL STEERING
6G-2230 LINES GP-SUPPLEMENTAL STEERING
LINES GP-SUPPLEMENTAL STEERING
6G-2230 LINES GP-SUPPLEMENTAL STEERING
VALVE GP
9J-8225 VALVE GP
VALVE GP
3G-7557 VALVE GP
CYLINDER & MOUNTING GP
8D-6900 CYLINDER & MOUNTING GP
VALVE GP-RELIEF
3G-6473 VALVE GP-RELIEF
CYLINDER & MOUNTING GP
8D-6900 CYLINDER & MOUNTING GP
CYLINDER GP-SERVO STEERING
9J-8774 CYLINDER GP-SERVO STEERING
CYLINDER GP
4T-7819 CYLINDER GP
CARTRIDGE GP
4T-7930 CARTRIDGE GP
GUARD GP-RADIATOR
6G-2980 GUARD GP-RADIATOR
GUARD GP-RADIATOR
6G-2980 GUARD GP-RADIATOR

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