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7J9035 CONTROL VALVE GROUP Serial No. 79S80-Up Part of Hydraulic Tank and Valve shown on Page 143 6J3400 Valve parts are shown on Page 145 768B


HYDRAULIC SYSTEM
VALVE GP-CONTROL
TANK GP
PUMP GP

TRACTOR 768B TRACTOR 79S
 768B TRACTOR 79S00001-UP (MACHINE) POWERED BY D343 ENGINE UEG0580S 768B 79S   (1971)

HYDRAULIC SYSTEM

VALVE GP-CONTROL
CONTROL VALVE GROUP
6J-8899 CONTROL VALVE GROUP
CONTROL VALVE GROUP
7J-9035 CONTROL VALVE GROUP
 

#UEG0580S0400
 

7J-9035: CONTROL VALVE GROUP

7J9035 CONTROL VALVE GROUP
Serial No. 79S80-Up
Part of Hydraulic Tank and Valve shown on Page 143
6J3400 Valve parts are shown on Page 145
c144284 UEG0580S
7J9035 CONTROL VALVE GROUP Parts scheme
  For full view, you need register

Parts for your 768B TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 8F-3469 [8] SEAL  
2. 4J-0523 [5] SEAL  
3. 2J-5436 [1] VALVE  
4. 6J-3400 Y [1] VALVE GROUP  
    (Separate Illustration)
5. 4J-7066 [1] SPRING  
6. 2J-5820 [1] PLUG  
7. 4J-0519 [1] SEAL  
8. 4J-2923 [1] FLANGE  
9. 0T-0320 [2] BOLT  
10. 3B-3507 [3] LOCKWASHER  
11. 4J-4735 [1] RETAINER  
12. 4J-3789 [1] SPRING  
13. 5J-3381 [1] RETAINER  
14. 4J-1184 [1] PLUG ASSEM.  
15. 4B-9783 [1] BALL  
  3J-7810 [1] SPRING  
16. 1D-4703 [1] BOLT  
17. 4J-6505 [1] HOUSING  
18. 0S-1571 [2] BOLT  
  3B-4506 [2] LOCKWASHER  
19. 5J-3382 [1] SPACER  
20. 7J-5705 [1] DOWEL  
21. 0S-1587 [3] BOLT  
  3B-4508 [3] LOCKWASHER  
22. 4J-4753 [1] COVER  
23. 7J-9006 [1] VALVE GROUP  
24. 2J-5437 [1] INSERT  
25. 5J-2695 [1] CAM  
  Y   SEPARATE ILLUSTRATION
 

#UEG0580S0401
 

8J-2380: VALVE GP-RELIEF

8J2380 RELIEF VALVE GROUP
Serial No. 79S80-Up
Part of 8J2535 Hydraulic Tank and Valve Group shown on Pages 142D & 143A
c115713 UEG0580S
8J2380 VALVE GP-RELIEF Parts scheme
  For full view, you need register

Parts for your 768B TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 8J-2377 [1] BODY  
2. 8B-4624 [4] SHIM .81MM(.032IN)THK  
3. 8J-2378 [1] PLUG  
4. 6J-3380 [1] SPRING  
5. 8J-2379 [1] VALVE  
 

#UEG0580S0402
 

6J-3400: RELIEF VALVE GROUP

6J3400 RELIEF VALVE GROUP--Type 1
Part of 6J8899 and 7J9035 Control Valve Groups shown on Pages 144 & 144A
c219682 UEG0580S
6J3400 RELIEF VALVE GROUP Parts scheme
  For full view, you need register

Parts for your 768B TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3J-3429 [1] PLUG  
2. 3J-7470 [2] SHIM 1.219 mm(.048 in.) thick  
  3H-2549 [4] SHIM .254 mm(.010 in.) thick  
3. 4F-7115 [1] SPRING  
4. 1J-8497 [1] VALVE  
5. 8J-0061 C [1] SEAT  
6. 4J-0522 C [1] SEAL  
7. 5J-4664 [1] SPRING  
8. 6J-3405 [1] SEAT  
9. 4J-0519 [1] SEAL  
10. 9J-8142 C [1] VALVE GROUP  
11. 6J-1311 [1] ROD  
12. 2J-5357 C [1] BODY  
13. 0S-1573 [2] BOLT  
  3B-4508 [2] LOCKWASHER  
  C   INDICATES CHANGE
 

#UEG0580S0403
 

6J-3400: RELIEF VALVE GROUP

6J3400 RELIEF VALVE GROUP--Type 2
Part of 6J8899 and 7J9035 Control Valve Groups shown on Pages 144 & 144A
c220996 UEG0580S
6J3400 RELIEF VALVE GROUP Parts scheme
  For full view, you need register

Parts for your 768B TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3J-3429 [1] PLUG  
2. 2J-2866 C [2] SHIM .127 mm(.005 in.) thick  
  3H-2549 C [5] SHIM .254 mm(.010 in.) thick  
3. 2J-6089 C [1] SPRING  
4. 1J-8497 [1] VALVE  
5. 8J-0061 [1] SEAT  
6. 4J-0522 [1] SEAL  
7. 5J-4664 [1] SPRING  
8. 6J-3405 [1] SEAT  
9. 4J-0519 [1] SEAL  
10. 9J-8142 [1] VALVE GROUP  
11. 6J-1311 [1] ROD  
12. 2J-5357 [1] BODY  
13. 0S-1573 [2] BOLT  
  3B-4508 [2] LOCKWASHER  
  C   INDICATES CHANGE
 

#UEG0580S0404
 

5J-2875: RELIEF VALVE GROUP

5J2875 RELIEF VALVE GROUP--Brake Cooling
Serial No. 79S1 to 79S79 inclusive
Part of 5J6550 Hydraulic Tank & Valve Group shown on Pages 142 & 142B
c112935 UEG0580S
5J2875 RELIEF VALVE GROUP Parts scheme
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Parts for your 768B TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. [4] BOLT  
2. [4] LOCKWASHER  
3. [1] COVER ASSEM.  
4. [1] VALVE  
5. [1] SEAL  
6. [1] BODY  
7. [1] SPRING  
8. [4] SHIM  
 

#UEG0580S0405
 

7J-0611: HYDRAULIC PUMP ASSEMBLY

7J611 HYDRAULIC PUMP ASSEMBLY--Type 1
Serial No. 79S1 to 79S66 inclusive
c113588 UEG0580S
7J0611 HYDRAULIC PUMP ASSEMBLY Parts scheme
  For full view, you need register

Parts for your 768B TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  O [2] SCREW  
  7J-8081 C [1] COVER ASSEM.  
  7J-8080 [4] DAMPER  
    (Part of 7J8081 Assem.)
  J [2] PIN  
  J [2] SCREW  
  J [1] RING  
  J [1] ROTOR  
  2H-3934 H [1] SEAL  
  2H-4145 H [1] SEAL  
  2B-0947 [4] BOLT  
  4K-0415 [1] COVER  
  1S-0670 H [1] RING  
    THE FOLLOWING REPAIR KIT IS AVAILABLE:
  5J-4160 [1] KIT (SEAL)  
    (CONSISTS OF PARTS MARKED H)
  1H-9696 H [1] SEAL  
  J [1] PLATE  
  1S-0669 H [1] RING  
  J [10] VANE  
  J [10] INSERT  
  4J-3427 [4] BOLT  
  J [1] PLATE  
  [1] BEARING  
  [1] PLATE ASSEM.  
  7J-0563 R [1] CARTRIDGE ASSEM.  
    (21 GALLON PER MINUTE)
    (CONSISTS OF PARTS MARKED J)
  5J-9852 R [1] CARTRIDGE ASSEM.  
    (42 GALLON PER MINUTE)
    (CONSISTS OF PARTS MARKED O)
  O [2] PIN  
  O [1] ROTOR  
  4J-9221 H [1] RING  
  6H-3977 H [1] SEAL  
  1S-0668 H [1] RING  
  2J-7760 [1] BODY  
  3J-7719 [1] RING  
  1J-6474 [1] RING  
  5J-1555 H [1] SEAL  
  2J-7759 H [1] WIPER  
  5J-1219 [1] SHAFT  
  2J-7763 [1] WASHER  
  3L-1425 [1] BEARING  
  5F-3999 [1] SEAL  
  0S-1589 [2] BOLT  
  3B-4510 [2] LOCKWASHER  
    (NOT PART OF HYDRAULIC PUMP ASSEM. 7J611)
  O [1] PLATE  
  5F-3106 H [1] SEAL  
  2H-3935 H [1] SEAL  
  O [10] VANE  
  O [10] INSERT  
  O [1] RING  
  R   REMFG PART MAY BE AVAILABLE
 

#UEG0580S0406
 

7J-0611: HYDRAULIC PUMP ASSEMBLY

7J611 HYDRAULIC PUMP ASSEMBLY--Type 2
Serial No. 79S1 to 79S66 inclusive
c157083 UEG0580S
7J0611 HYDRAULIC PUMP ASSEMBLY Parts scheme
  For full view, you need register

Parts for your 768B TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  L [2] SCREW  
  7J-8081 [1] COVER ASSEM.  
  7J-8080 [4] DAMPER  
    (Part of 7J8081 Assem.)
  J [2] PIN  
  J [2] SCREW  
  J [1] RING  
  J [1] ROTOR  
  2H-3934 H [1] SEAL  
  2H-4145 H [1] SEAL  
  2B-0947 [4] BOLT  
  4K-0415 [1] COVER  
  1S-0670 H [1] RING  
    THE FOLLOWING REPAIR KIT IS AVAILABLE:
  9J-5111 C [1] KIT (Seal)  
    (Consists of Parts Marked H)
  1H-9696 H [1] SEAL  
  J [1] PLATE  
  1S-0669 H [1] RING  
  J [10] VANE  
  J [10] INSERT  
  4J-3427 [4] BOLT  
  J [1] PLATE  
  [1] BEARING  
  [1] PLATE ASSEM.  
  7J-0563 R [1] CARTRIDGE ASSEM.  
    (21 GALLON PER MINUTE)
    (CONSISTS OF PARTS MARKED J)
  5J-9852 R [1] CARTRIDGE ASSEM.  
    (42 GALLON PER MINUTE)
    (CONSISTS OF PARTS MARKED L)
  L [2] PIN  
  L [1] ROTOR  
  4J-9221 H [1] RING  
  6H-3977 H [1] SEAL  
  1S-0668 H [1] RING  
  9J-5120 C [1] BODY  
  3G-0785 C [1] BALL  
  3J-7719 [1] RING  
  1J-6474 [1] RING  
  2J-7764 HC [1] SEAL  
  5J-1219 [1] SHAFT  
  2J-7763 [1] WASHER  
  3L-1425 [1] BEARING  
  5F-3999 [1] SEAL  
  0S-1589 [2] BOLT  
  3B-4510 [2] LOCKWASHER  
    (NOT PART OF HYDRAULIC PUMP ASSEM. 7J611)
  L [1] PLATE  
  5F-3106 H [1] SEAL  
  2H-3935 H [1] SEAL  
  L [10] VANE  
  L [10] INSERT  
  L [1] RING  
  C   INDICATES CHANGE
  R   REMFG PART MAY BE AVAILABLE
 

#UEG0580S0407
 

7J-0611: HYDRAULIC PUMP ASSEMBLY

7J611 HYDRAULIC PUMP ASSEMBLY--Type 3
Serial No. 79S1 to 79S66 inclusive
3G2236 & 3G2752 Cartridge parts are shown on Page 146-3
c165304 UEG0580S
7J0611 HYDRAULIC PUMP ASSEMBLY Parts scheme
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Parts for your 768B TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4J-3427 [4] BOLT  
2. 1J-6474 [1] RING  
3. 3L-1425 [1] BEARING  
4. 2J-7763 [1] WASHER  
5. 2J-7764 [1] SEAL  
6. 5J-1219 [1] SHAFT  
7. 2B-0947 [4] BOLT  
8. 3G-0785 [1] BALL  
9. 3J-7719 [1] RING  
10. 9J-5120 [1] BODY  
11. 3G-2236 RYC [1] CARTRIDGE GROUP (42 GPM)  
    (Separate Illustration)
12. 7J-8081 [1] COVER ASSEM.  
    (Includes)
  7J-8080 [4] DAMPER  
13. 3G-2752 RYC [1] CARTRIDGE GROUP (21 GPM)  
    (Separate Illustration)
14. 4K-0415 [1] COVER  
  R   REMFG PART MAY BE AVAILABLE
  Y   SEPARATE ILLUSTRATION
  C   INDICATES CHANGE
 

#UEG0580S0408
 

3G-2236: CARTRIDGE GP

3G2236 CARTRIDGE GROUP--24 GPM
Serial No. 79S1 to 79S66 inclusive
Part of 7J611 Hydraulic Pump Assembly shown on Page 146-2
c213369 UEG0580S
3G2236 CARTRIDGE GP Parts scheme
  For full view, you need register

Parts for your 768B TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3G-2241 [4] RETAINER (seal)  
2. 3G-2240 [4] SEAL  
3. 2H-3935 [1] SEAL  
4. 3G-2242 [1] RING  
5. 1S-0668 [1] RING  
6. 6H-3977 [1] SEAL  
 

#UEG0580S0409
 

3G-2752: CARTRIDGE GP

3G2752 CARTRIDGE GROUP--21 GPM--Counterclockwise
Serial No. 79S1 to 79S66 inclusive
Part of 7J611 Hydraulic Pump Assembly shown on Page 146-2
c165281 UEG0580S
3G2752 CARTRIDGE GP Parts scheme
  For full view, you need register

Parts for your 768B TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3G-2192 [4] RETAINER  
2. 3G-2191 [4] SEAL  
3. 2H-3934 [1] SEAL  
4. 3G-2193 [1] SEAL  
5. 1S-0670 [1] RING  
6. 1H-9696 [1] SEAL  
 

Information:

Tool Operating Manual
4C-9910 Portable Hydraulic Tester (Flow 125 GPM) {0599, 0784, 5050, 5057, 5095}
4C-9910 Portable Hydraulic Tester (Flow 125 GPM) {0599, 0784, 5050, 5057, 5095}
Service Magazine
The 6V-8633 Connector Has Changed {5057, 7553}
2005/11/28

Caterpillar Parts SIS Catalog 768B :

CONTROL VALVE GROUP
6J-8899 CONTROL VALVE GROUP
8J-2535 HYDRAULIC TANK AND VALVE GROUP
HYDRAULIC TANK AND VALVE GROUP
8J-2535 HYDRAULIC TANK AND VALVE GROUP
8J-2535 HYDRAULIC TANK AND VALVE GROUP
HYDRAULIC TANK AND VALVE GROUP
8J-2535 HYDRAULIC TANK AND VALVE GROUP
5J-6550 HYDRAULIC TANK AND VALVE
HYDRAULIC TANK AND VALVE
5J-6550 HYDRAULIC TANK AND VALVE
5D-6550 HYDRAULIC TANK AND VALVE
VALVE GP-RELIEF
8J-2380 VALVE GP-RELIEF
RELIEF VALVE GROUP
6J-3400 RELIEF VALVE GROUP
RELIEF VALVE GROUP
6J-3400 RELIEF VALVE GROUP
RELIEF VALVE GROUP
5J-2875 RELIEF VALVE GROUP
HYDRAULIC PUMP ASSEMBLY
7J-0611 HYDRAULIC PUMP ASSEMBLY
HYDRAULIC PUMP ASSEMBLY
7J-0611 HYDRAULIC PUMP ASSEMBLY
HYDRAULIC PUMP ASSEMBLY
7J-0611 HYDRAULIC PUMP ASSEMBLY
CARTRIDGE GP
3G-2236 CARTRIDGE GP

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