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3S9620 FUEL PUMP HOUSING GROUP--Part 2 of 2--Type 2 Part of 5S2978 Fuel Pump Housing and Governor Group shown on Page 43 623


FUEL SYSTEM
PUMP GP-FUEL TRANSFER
LUBRICATION SYSTEM
LINES GP-ENGINE OIL
FILTER GP-ENGINE OIL
PUMP GP-ENGINE OIL
ELECTRICAL AND STARTING SYSTEM
STARTING MOTOR GP
SWITCH GP
STARTING MOTOR GP
SWITCH GP
STARTING MOTOR GP

WHEEL TRACTOR 623 WHEEL TRACTOR 52U
 623 TRACTOR 52U00001-UP (MACHINE) UEG0618S 623 52U   (1972)

FUEL SYSTEM

PUMP GP-FUEL TRANSFER
FUEL TRANSFER PUMP GROUP
4S-5661 FUEL TRANSFER PUMP GROUP
FUEL PUMP HOUSING GROUP
3S-9620 FUEL PUMP HOUSING GROUP
FUEL PUMP HOUSING GROUP
3S-9620 FUEL PUMP HOUSING GROUP
FUEL PUMP HOUSING GROUP
3S-9620 FUEL PUMP HOUSING GROUP
FUEL PUMP HOUSING GROUP
3S-9620 FUEL PUMP HOUSING GROUP
 

#UEG0618S0080
 

3S-9620: FUEL PUMP HOUSING GROUP

3S9620 FUEL PUMP HOUSING GROUP--Part 2 of 2--Type 2
Part of 5S2978 Fuel Pump Housing and Governor Group shown on Page 43
c172237 UEG0618S
3S9620 FUEL PUMP HOUSING GROUP Parts scheme
  For full view, you need register

Parts for your 623 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 2S-7018 [1] GASKET  
2. 1B-7182 [2] BOLT  
  4B-4277 [2] WASHER  
3. 3S-5759 [1] LEVER  
4. 2S-7020 [1] COVER ASSEM.  
5. 4F-3492 [1] DOWEL  
6. 2A-5222 [1] WASHER  
7. 2A-5220 [1] PLUG  
8. 2M-4314 [8] BUSHING  
9. 1B-7182 [2] BOLT  
  3B-4505 [2] LOCKWASHER  
10. 8H-9204 [8] WASHER  
11. 8S-0218 [1] PIN ASSEM.  
12. 4M-0411 [8] BONNET  
13. 9B-1363 [8] SPRING  
14. 8S-0219 [1] FLANGE  
15. 1S-7057 [2] GASKET  
16. 3D-2992 C [8] SEAL  
17. 1M-3506 [8] RING  
18. 9H-5746 [8] CHECK  
19. 5M-2697 [8] SPACER (.170" Thick)  
  2M-4208 [8] SPACER (.174" Thick)  
  2M-4209 [8] SPACER (.178" Thick)  
  2M-4210 [8] SPACER (.182" Thick)  
  2M-4211 [8] SPACER (.186" Thick)  
  2M-4212 [8] SPACER (.190" Thick)  
  5M-2691 [8] SPACER (.194" Thick)  
20. 3S-8336 [8] PLUNGER AND BARREL ASSEM.  
21. 1S-7592 [8] SPRING  
22. 9H-5729 [8] WASHER  
23. 3S-9736 [8] LIFTER ASSEM.  
  C   INDICATES CHANGE
 

#UEG0618S0081
 

2S-4412: OIL LINES

OIL LINES (2S4412 N/S)
c105167 UEG0618S
2S4412 OIL LINES Parts scheme
  For full view, you need register

Parts for your 623 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 0T-0055 [2] BOLT  
2. 3B-4506 [15] LOCKWASHER  
3. 1S-6595 [1] GASKET  
4. 0S-1594 [4] BOLT  
5. 1S-4810 [1] GASKET  
6. 6K-4949 [1] CLIP ASSEM.  
7. 1D-4539 [1] BOLT  
8. 4B-4277 [1] WASHER  
9. 8M-5900 [1] FITTING  
  8F-9362 [2] NUT  
    (Part of 8M5900 Fitting)
10. 8M-5266 [1] SEAL  
11. 1A-2029 [2] BOLT  
12. 2S-4204 [1] ELBOW  
13. 2S-5632 [1] GAUGE ASSEM.  
14. 2S-5629 [1] TUBE ASSEM.  
    (Oil Level Gauge Guide)
15. 5D-6523 [1] CLIP  
16. 7F-7889 [1] GASKET  
17. 3B-9053 [1] FITTING  
  8F-8998 [1] NUT  
    (Part of 3B9053 Fitting)
18. 4S-7868 [1] TUBE (Oil Cooler Drain)  
19. 3B-8997 [1] FITTING  
  8F-8998 [1] NUT  
    (Part of 3B8997 Fitting)
20. 4S-8792 [1] ADAPTER  
21. 1S-9527 [1] GASKET  
22. 8M-1869 [1] PLUG  
23. 0S-1587 [1] BOLT (1.75" Long)  
24. 9S-1366 [1] BOLT (2.50" Long)  
25. 3B-4508 [2] LOCKWASHER  
26. 7M-7410 [1] PLUG  
27. 1F-6068 [1] FITTING  
  8F-9362 [1] NUT  
    (Part of 1F6068 Fitting)
28. 2S-0538 [1] TUBE (33.50" Long)  
    (Ref. No. 38 to Oil Filter Base)
29. 8H-9402 [1] ADAPTER  
  9H-4557 [2] SEAL  
30. 2H-2519 [1] GASKET  
31. 1S-7654 [1] COVER  
  1S-7331 [1] GASKET  
32. 0S-1590 [6] BOLT  
33. 2S-4181 [1] TUBE ASSEM. (Oil Drain)  
34. 2S-0542 [1] TUBE ASSEM. (Oil Supply)  
35. 6B-5703 [1] SPACER  
36. 3B-4505 [1] LOCKWASHER  
37. 7S-1717 [1] BRACKET  
38. 0L-1351 [1] BOLT  
39. 1D-4717 [1] NUT  
40. 3J-5389 [1] PLUG  
 

#UEG0618S0082
 

1S-5132: OIL FILTER ASSEMBLY

1S5132 OIL FILTER ASSEMBLY
c105164 UEG0618S
1S5132 OIL FILTER ASSEMBLY Parts scheme
  For full view, you need register

Parts for your 623 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 8H-1454 [3] CASE ASSEM.  
2. 8H-1462 [3] COVER ASSEM.  
3. 5M-5999 [3] GASKET  
4. 1K-2728 [3] GASKET  
5. 3H-3385 [3] SEAL  
6. 6B-0806 [3] SPRING  
7. 8H-1461 [3] PLATE  
8. 7F-7691 [3] CLIP  
9. 8H-1460 [3] SCREW  
    (1 each in 8H1462 Cover Assem.)
10. 9M-3873 [3] STUD ASSEM.  
11. 4H-3119 [3] PIN (Spring)  
    (1 in each 9M3873 Stud Assem.)
12. 5S-0484 [3] ELEMENT ASSEM.  
    (Disposable)
13. 2M-8691 [3] GASKET  
14. 0S-1588 H [7] BOLT  
15. 3B-4506 H [8] LOCKWASHER  
16. 1S-9544 H [2] SEAL  
17. 0S-1590 H [1] BOLT  
18. 2S-0543 [1] BASE ASSEM.  
  1S-8881 [2] FERRULE  
19. 0L-2288 [1] PLUG  
20. 3L-1850 [3] PLUG  
21. 9M-0853 [2] PLUNGER  
22. 6F-8007 [2] SPRING  
23. 6B-0831 [1] GASKET  
24. 2M-1538 [4] STUD  
25. 8M-9928 [1] PLUNGER  
26. 8M-9929 [1] RETAINER  
27. 9M-4685 [1] SPRING  
28. 6B-0830 [1] COVER  
29. 0S-1617 [2] BOLT  
30. 3B-4505 [2] LOCKWASHER  
31. 2H-8829 [1] PLUG  
32. 4F-9325 [1] GASKET  
    (Parts of 2S543 Base Assem.)
33. 6L-1651 H [2] SEAL  
34. 8H-1495 [2] CLAMP  
35. 0S-1588 [4] BOLT  
36. 3B-4506 [4] LOCKWASHER  
37. 1M-7360 [2] CLAMP  
  H   NOT PART OF 1S5132 OIL FILTER
 

#UEG0618S0083
 

1S-8653: OIL PUMP AND DRIVE

OIL PUMP AND DRIVE (1S8653 N/S)
c129231 UEG0618S
1S8653 OIL PUMP AND DRIVE Parts scheme
  For full view, you need register

Parts for your 623 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 0S-1571 [2] BOLT (1.75" long)  
2. 7H-1861 [6] LOCK  
3. 8M-5249 [1] SEAL  
4. 1S-9523 Y [1] PUMP ASSEM.  
    (See Separate Illustration)
5. 1S-5948 [1] GEAR ASSEM. (44 Teeth)  
  1S-5944 [1] BEARING  
    (Part of 1S5948 Gear Assem.)
6. 0S-1590 [1] BOLT (2" long)  
7. 2H-3755 [4] BOLT  
8. 1M-7390 [4] LOCK  
9. 1S-2835 [1] GEAR (44 Teeth)  
10. 3B-5412 [1] NUT  
11. 9S-1302 [1] WASHER  
12. 3B-4619 [1] COTTER PIN  
13. 2S-4001 [1] BAFFLE  
14. 8M-5599 [1] KEY  
15. 7M-4353 [2] GASKET  
16. 7B-2742 [6] BOLT  
17. 8F-8682 [2] LOCK  
18. 2S-2726 [1] SCREEN ASSEM.  
19. 1S-7404 [1] BELL  
20. 1S-7389 [1] COVER  
21. 0S-1588 [2] BOLT  
22. 7M-0168 [1] LOCK  
23. 2S-0356 [1] GASKET  
24. 0L-1143 [1] BOLT (2.50" long)  
  Y   SEPARATE ILLUSTRATION
 

#UEG0618S0084
 

1S-9523: OIL PUMP ASSEMBLY

1S9523 OIL PUMP ASSEMBLY
Part of Oil Pump and Drive
c128131 UEG0618S
1S9523 OIL PUMP ASSEMBLY Parts scheme
  For full view, you need register

Parts for your 623 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 1S-9565 [1] BODY ASSEM.  
2. 1S-9529 [1] BEARING  
3. [1] SHAFT  
    (Parts of 1S9565 Body Assem.)
4. 1S-9827 [1] GEAR ASSEM. (12 Teeth Idler)  
5. 1S-9572 [2] BEARING  
    (Part of 1S9827 Gear Assem.)
6. 2S-5175 [1] SPACER  
7. 1S-9826 [1] GEAR ASSEM. (12 Teeth Idler)  
8. 1S-9572 [2] BEARING  
    (Part of 1S9826 Gear Assem.)
9. 8S-1338 C [1] SHAFT ASSEM. (12 Teeth Drive)  
10. 7S-9444 C [1] GEAR (12 Teeth Drive)  
11. 5S-1613 C [1] KEY  
12. 1B-2886 [2] BOLT (3.75" Long)  
  0S-1573 [2] BOLT (4" Long)  
13. 4H-2010 [4] LOCK  
14. 0S-1588 [1] BOLT  
15. 0L-0364 [3] LOCK  
16. 3S-5823 [1] SPRING  
  2S-2781 [1] PLUNGER  
17. 9M-7579 [1] COVER  
18. 0T-0573 [2] BOLT  
19. 4S-5355 [1] DIFFUSER  
20. 1S-5953 [1] BODY ASSEM.  
21. 8M-1063 [2] DOWEL  
22. 1S-9402 [2] DOWEL  
23. 1S-9529 [1] BEARING  
24. 1S-5946 [1] SHAFT ASSEM.  
25. 5B-5821 [1] DOWEL  
    (Parts of 1S5953 Body Assem.)
  C   INDICATES CHANGE FROM PREVIOUS
 

#UEG0618S0085
 

1S-8658: ELECTRIC STARTER GROUP

1S8658 ELECTRIC STARTER GROUP--24 Volt
Serial No. 52U1 to 52U259 inclusive
3S8473 Electric Starting Motor parts are shown on Pages 60, 61 and 62
c78982 UEG0618S
1S8658 ELECTRIC STARTER GROUP Parts scheme
  For full view, you need register

Parts for your 623 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4B-4043 [1] BOLT  
2. 3B-4510 [3] LOCKWASHER  
3. 9M-1816 [1] GASKET  
4. 0S-1595 [1] BOLT  
  3B-4508 [1] LOCKWASHER  
5. 6B-8638 [2] STUD  
6. 9M-1817 [1] ADAPTER  
7. 4H-7869 [1] GASKET  
8. 1B-4206 [2] NUT  
9. 3S-8473 Y [1] MOTOR ASSEM.  
    (See Separate Illustration)
10. 0T-0102 [1] BOLT  
  3B-4506 [1] LOCKWASHER  
11. 5H-3633 [1] CABLE ASSEM. (Ground)  
12. 1B-5218 [1] TERMINAL  
13. 1M-4986 [1] TERMINAL  
    (Parts of 5H3633 Cable Assem.)
  Y   SEPARATE ILLUSTRATION
 

#UEG0618S0086
 

4M-1812: SWITCH AS-SOLENOID

4M1812 SOLENOID SWITCH ASSEMBLY
Part of 3S8473 Electric Starting Motor Assembly shown on Page 60
c225020 UEG0618S
4M1812 SWITCH AS-SOLENOID Parts scheme
  For full view, you need register

Parts for your 623 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 7N-1269 C [ 1] TERMINAL ASSEM.  
  4M-1834 [ 1] PLATE  
2. 7F-4907 [ 1] STRIP  
3. 3H-3681 [ 2] NUT  
4. 3B-4508 [ 4] LOCKWASHER  
5. 3H-3680 [ 2] NUT  
6. 7F-3494 [ 2] WASHER  
7. 4M-1836 [ 2] INSULATOR  
8. 4M-1837 [ 2] BUSHING  
9. 7F-4906 [ 1] STUD  
10. 4M-2800 [ 1] TERMINAL  
11. 7N-1271 [ 1] TERMINAL ASSEM.  
12. 4M-5274 [ 1] SCREW (hex head)  
    - OR -
  5P-9132 C [ 1] SCREW (truss head)  
13. 1P-3879 [ 1] LEAD ASSEM.  
14. 4M-3217 [ 2] SCREW  
15. 4M-1814 [ 1] CONTACT ASSEM.  
16. 4M-1813 [ 1] CASE ASSEM.  
17. 1F-0073 [ 2] CLIP  
18. 4M-1815 [ 1] SPRING  
19. 9M-7657 [ 4] NUT  
    - OR -
  9S-4489 [ 4] SCREW ASSEM.  
20. 9S-4490 [ 4] GASKET  
    INDICATES CHANGE
 

#UEG0618S0087
 

1S-8658: ELECTRIC STARTER GROUP

1S8658 ELECTRIC STARTER GROUP--24 Volt
Serial No. 52U260-Up
2P3926 Electric Starting Motor parts are shown on Pages 62A, 62B and 62C
c147099 UEG0618S
1S8658 ELECTRIC STARTER GROUP Parts scheme
  For full view, you need register

Parts for your 623 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4B-4043 [1] BOLT  
2. 3B-4510 [3] LOCKWASHER  
3. 9M-1816 [1] GASKET  
4. 0S-1595 [1] BOLT  
  3B-4508 [1] LOCKWASHER  
5. 6B-8638 [2] STUD  
6. 9M-1817 [1] ADAPTER  
7. 4H-7869 [1] GASKET  
8. 1B-4206 [2] NUT  
9. 2P-3926 RYC [1] MOTOR ASSEM.  
    (Separate Illustration)
10. 0T-0102 [1] BOLT  
  3B-4506 [1] LOCKWASHER  
11. 5H-3633 [1] CABLE ASSEM. (ground)  
    (Includes)
12. 1B-5218 [1] TERMINAL  
13. 1M-4986 [1] TERMINAL  
  R   REMFG PART MAY BE AVAILABLE
  Y   SEPARATE ILLUSTRATION
  C   INDICATES CHANGE
 

#UEG0618S0088
 

6N-5123: SWITCH AS-SOLENOID

6N5123 SOLENOID SWITCH ASSEMBLY--24 Volt
Part of 2P3926 Electric Starting Motor Group shown on Page 62A
c162751 UEG0618S
6N5123 SWITCH AS-SOLENOID Parts scheme
  For full view, you need register

Parts for your 623 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 7N-0908 C [1] TERMINAL ASSEM.  
    (Includes)
  4M-1834 [1] PLATE  
2. 7F-4907 [1] STRIP  
3. 3H-3681 [2] NUT  
4. 3B-4508 [4] LOCKWASHER  
5. 3H-3680 [2] NUT  
6. 7F-3494 [2] WASHER  
7. 4M-1836 [2] INSULATOR  
8. 4M-1837 [2] BUSHING  
9. 7N-0910 [1] TERMINAL ASSEM.  
10. 7N-0909 [1] TERMINAL ASSEM.  
11. 9S-4490 [1] GASKET  
12. 4M-5274 [1] SCREW  
13. 9S-4489 [4] SCREW ASSEM.  
14. 4M-3217 [2] SCREW  
15. 4M-1814 [1] CONTACT ASSEM.  
16. 3P-0072 [1] CASE ASSEM.  
17. 1F-0073 [2] CLIP  
18. 4M-1815 [1] SPRING  
  C   INDICATES CHANGE
 

#UEG0618S0089
 

3S-8473: ELECTRIC STARTING MOTOR ASSEMBLY

3S8473 ELECTRIC STARTING MOTOR ASSEMBLY--24 Volt--Part 1 of 3
Serial No. 52U1 to 52U259 inclusive
Part of 1S8658 Electric Starter Group shown on Page 59
4M1812 Switch parts are shown on Page 59
c113561 UEG0618S
3S8473 ELECTRIC STARTING MOTOR ASSEMBLY Parts scheme
  For full view, you need register

Parts for your 623 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 7F-4556 [6] BOLT  
2. 1L-4789 [6] LOCKWASHER  
3. 7M-0328 [1] FRAME ASSEM.  
4. 7S-9826 [1] PLUG  
5. 7F-3506 [1] BUSHING  
6. 9F-2247 [1] PLUG  
7. 9F-2547 [1] WICK  
8. 7S-9825 [1] GASKET  
9. 7M-8651 [1] ARMATURE ASSEM.  
10. 3L-3380 [1] BUSHING  
11. 7M-0324 [1] COIL ASSEM.  
12. 9H-3757 [2] WASHER  
13. 7F-3494 [1] WASHER  
14. 7M-0326 [1] CONNECTOR  
15. 1D-5117 [2] NUT  
16. 4M-1812 Y [1] SWITCH ASSEM.  
    (See Separate Illustration)
17. 6H-3622 [4] SCREW ASSEM.  
18. 3B-4508 [1] LOCKWASHER  
19. 9F-9298 [12] SCREW  
20. 7M-0325 [1] INSULATOR  
21. 4M-1831 [3] PLUG  
22. 4M-1832 [3] GASKET  
23. 1H-2629 [3] STRIP  
24. 7F-3488 [6] SHOE  
25. 7M-0327 [1] WASHER  
  Y   SEPARATE ILLUSTRATION
 

Information:

Tool Operating Manual
20 GPM Portable Fuel Filtration System {0374, 0599, 0706, 1250, 1256, 1261}
20 GPM Portable Fuel Filtration System {0374, 0599, 0706, 1250, 1256, 1261}
Service Magazine
Replace Camshaft And Install New Lifters If Pitting, Spalling, Or Wear Occurs On Lobes Of 4N0599 And 4N0602 Camshafts In Fuel Injection Pump Groups{1251,1253}
1991/05/20

Caterpillar Parts SIS Catalog 623 :

FUEL PUMP HOUSING GROUP
3S-9620 FUEL PUMP HOUSING GROUP
FUEL PUMP HOUSING GROUP
3S-9620 FUEL PUMP HOUSING GROUP
FUEL PUMP HOUSING GROUP
3S-9620 FUEL PUMP HOUSING GROUP
FUEL INJECTION VALVES AND LINES
1S-8650 FUEL INJECTION VALVES AND LINES
FUEL FILTER
1S-8648 FUEL FILTER
FUEL TRANSFER PUMP GROUP
4S-5661 FUEL TRANSFER PUMP GROUP
PUMP AS-FUEL PRIMING
2S-0308 PUMP AS-FUEL PRIMING
FUEL PRIMING PUMP
1S-8664 FUEL PRIMING PUMP
OIL LINES
2S-4412 OIL LINES
OIL FILTER ASSEMBLY
1S-5132 OIL FILTER ASSEMBLY
OIL PUMP AND DRIVE
1S-8653 OIL PUMP AND DRIVE
OIL PUMP ASSEMBLY
1S-9523 OIL PUMP ASSEMBLY
ELECTRIC STARTER GROUP
1S-8658 ELECTRIC STARTER GROUP
SWITCH AS-SOLENOID
4M-1812 SWITCH AS-SOLENOID
ELECTRIC STARTER GROUP
1S-8658 ELECTRIC STARTER GROUP
SWITCH AS-SOLENOID
6N-5123 SWITCH AS-SOLENOID

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