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FUEL RATIO OVERRIDE CONTROL (6D8220 N/S) Serial No. 23H1820-Up 621 WHEEL TRACTOR


FUEL SYSTEM
CONTROL GP-FUEL RATIO
FILTER GP-FUEL
PUMP GP-FUEL PRIMING
PUMP GP-FUEL TRANSFER
FILTER GP-FUEL
PUMP GP-FUEL TRANSFER

WHEEL TRACTOR 621 WHEEL TRACTOR 23H
 621 TRACTOR 23H00001-02222 (MACHINE) UE070042 621 23H   (1966)

FUEL SYSTEM

CONTROL GP-FUEL RATIO
FUEL RATIO CONTROL
FUEL RATIO CONTROL
FUEL RATIO CONTROL
FUEL RATIO CONTROL
FUEL RATIO CONTROL
FUEL RATIO CONTROL
FUEL RATIO OVERRIDE CONTROL
6D-8220 FUEL RATIO OVERRIDE CONTROL
 

#UE0700420080
 

6D-8220: FUEL RATIO OVERRIDE CONTROL

FUEL RATIO OVERRIDE CONTROL (6D8220 N/S)
Serial No. 23H1820-Up
c115305 UE070042
6D8220 FUEL RATIO OVERRIDE CONTROL Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 6D-8223 [1] BRACKET  
  0L-1351 [4] BOLT  
2. 1D-4717 [4] NUT  
  3B-4506 [4] LOCKWASHER  
3. 6D-8222 [1] CABLE ASSEM.  
4. 7F-8092 [1] KNOB  
5. 6D-8221 [1] BRACKET  
6. 4B-2049 [1] NUT  
7. 4H-2792 [1] END  
8. 9S-1305 C [1] PIN  
  3B-4604 [1] COTTER PIN  
  C   INDICATES CHANGE
 

#UE0700420081
 

8H-7204: FILTER GP-FUEL

8H7204 FUEL FILTER GROUP
Part of Primary Fuel Filter and Lines
c100914 UE070042
8H7204 FILTER GP-FUEL Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  8H-2807 [1] NUT  
  2A-1162 [1] GASKET  
  1L-3769 [1] RING  
  7H-9680 [1] COVER  
  8H-2778 [1] GASKET  
  9M-2342 [1] ELEMENT ASSEM. (WASHABLE)  
  8H-7202 [1] CASE ASSEM.  
  7H-9678 [1] RETAINER  
  2H-3429 [1] RING  
  7S-9323 [1] SPRING  
 

#UE0700420082
 

FUEL PRIMING PUMP GROUP

FUEL PRIMING PUMP GROUP
2S308 Fuel Priming Pump Assembly parts are shown on Page 50
c78793 UE070042
None FUEL PRIMING PUMP GROUP Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 2S-0308 Y [1] PUMP ASSEM.  
    (See Separate Illustration)
2. 1S-9144 [1] RETAINER  
3. 6F-5559 [1] SEAL  
4. 5M-6214 [1] PLUG  
5. 9M-5230 [1] SPRING  
6. 7B-6368 [1] BALL  
7. 1S-9142 [1] BASE  
8. 0S-1595 [1] BOLT  
  4F-9325 [1] GASKET  
9. 2S-5158 [1] GASKET  
    (Adapter to Fuel Filter Case)
10. 9M-5230 [1] SPRING  
11. 7B-6368 [1] BALL  
12. 1D-4717 [2] NUT  
13. 3B-4506 [4] LOCKWASHER  
14. 2H-2519 [1] GASKET  
15. 0S-1594 [2] BOLT  
  Y   SEPARATE ILLUSTRATION
 

#UE0700420083
 

2S-0308: PUMP AS-FUEL PRIMING

2S308 FUEL PRIMING PUMP ASSEMBLY
Part of Fuel Priming Pump shown on Page 49
c110628 UE070042
2S0308 PUMP AS-FUEL PRIMING Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 2S-0311 [1] CAP  
2. 2S-0312 [1] BARREL ASSEM.  
3. 2S-0309 [1] ROD ASSEM.  
  2S-0310 [1] ROD  
4. 9F-7882 [1] PIN  
    (Parts of 2S309 Rod Assem.)
5. [1] SEAL  
6. 2S-0316 [1] NUT  
7. 3S-8427 [1] WASHER  
8. 4B-1236 [1] SCREW  
9. 2S-0317 [1] HOLDER  
10. 7M-7219 [1] BEARING  
  7M-7193 [2] RACE  
11. 2L-5894 [2] PIN  
 

#UE0700420084
 

4S-5661: FUEL TRANSFER PUMP GROUP

4S5661 FUEL TRANSFER PUMP GROUP
c127022 UE070042
4S5661 FUEL TRANSFER PUMP GROUP Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 1S-9153 [1] COVER  
2. 4B-4845 [1] PLUG  
3. 4M-9215 [1] GEAR (10 Teeth)  
4. 4S-5465 [1] WASHER  
5. 3S-4182 [1] SEAL  
6. 3S-9757 [1] RETAINER  
7. 0S-1618 [2] BOLT  
8. 4S-5659 [1] LOCK  
9. 5B-9603 H [2] BOLT  
10. 1B-4203 H [2] NUT  
11. 3B-4506 H [5] LOCKWASHER  
12. 2K-3455 [1] PIN  
13. 4S-9300 [1] COLLAR  
14. 4S-5658 [1] CAGE ASSEM.  
15. 8F-6058 [1] BEARING  
16. 4H-1723 [1] SEAL  
    (Parts of 4S5658 Cage Assem.)
17. 5H-5672 [1] SEAL  
18. 1H-8720 [1] SEAL  
19. 0S-1591 H [1] BOLT  
20. 2K-8199 [1] SEAL  
21. 4S-5660 [1] BODY ASSEM.  
22. 9F-2247 [1] PLUG  
23. 5M-6214 [1] PLUG  
24. 3B-1304 [1] SHAFT  
25. 3S-9466 [1] BEARING  
    (Parts of 4S5660 Assem.)
26. 4S-5656 [1] SHAFT ASSEM.  
27. 0S-1588 [5] BOLT  
28. 3B-4506 [6] LOCKWASHER  
29. 0S-1571 [1] BOLT  
  H   NOT PART OF 4S5661 FUEL TRANSF
 

#UE0700420085
 

1S-8648: FUEL FILTER

FUEL FILTER (1S8648 N/S)
c115201 UE070042
1S8648 FUEL FILTER Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 2S-8078 [1] COVER  
  2S-5158 [1] GASKET  
2. 5S-0568 [1] VALVE ASSEM.  
  5S-0566 [1] SLEEVE  
3. 8M-2483 [1] SPRING  
4. 8M-0874 [1] PLUNGER ASSEM.  
5. 5S-0567 [1] RETAINER  
6. 1H-8171 [1] SEAL  
7. 3B-8998 [2] FITTING  
  1F-1344 [1] NUT  
8. 1S-9136 [1] GASKET  
9. 4M-9643 [1] NEEDLE  
10. 1S-9273 [1] SEAT  
11. 1S-9277 [1] TUBE  
12. 2B-2695 [2] BOLT  
  3B-4505 [2] LOCKWASHER  
13. 4S-5364 [1] COVER  
14. 4S-5363 [1] GASKET  
15. 2A-1927 [1] NEEDLE ASSEM.  
16. 7F-3901 [1] SEAT  
17. 1D-4717 [4] NUT  
18. 3B-4506 [14] LOCKWASHER  
19. 1S-9135 [1] BODY  
20. 2S-2922 [1] GASKET  
21. 1B-4203 [6] NUT  
  4B-4278 [6] WASHER  
22. 1S-9131 [1] COVER ASSEM.  
23. 5M-6213 [2] PLUG  
24. 1S-3267 [1] PLUNGER ASSEM.  
25. 4S-6449 [1] CASE ASSEM.  
26. 1S-9130 [1] STUD  
27. 5M-1719 [1] STUD  
28. 1S-9130 [2] STUD  
29. 9S-1370 [5] STUD  
30. 7B-2335 [1] STUD  
31. 2M-1538 [2] STUD  
32. 3D-2871 [2] STUD  
33. 4S-5368 [1] ELEMENT ASSEM. (Disposable)  
    (Consists of 2 Elements)
34. 2P-3225 C [1] GASKET  
35. 7H-0831 [2] ROD  
36. 7H-0832 [2] SPRING  
37. 5H-8038 [2] SEAL  
38. 2S-5202 [1] ADAPTER  
39. 3B-1915 [4] BOLT  
  5F-0548 [4] WASHER  
40. 4M-9640 [1] PLUG  
  6B-7020 [1] GASKET  
41. 6H-1649 [1] SPRING  
  C   INDICATES CHANGE
 

#UE0700420086
 

3S-9620: FUEL PUMP HOUSING GROUP

3S9620 FUEL PUMP HOUSING GROUP--Part 1 of 2
Serial No. 23H1 to 778, 780 to 784, 786 to 789, 801, 809, 859, 863, 867, 917, 982 and 23H1030 inclusive
Part of Fuel Pump Housing, Drive and Governor shown on Pages 42 and 42A
c104241 UE070042
3S9620 FUEL PUMP HOUSING GROUP Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 1S-7084 [1] HOUSING ASSEM.  
2. 9H-4926 [1] FERRULE  
3. 5F-1749 [2] DOWEL  
4. 9H-1296 [2] BEARING  
5. 5M-6214 [1] PLUG  
6. 8M-3019 [8] DOWEL  
7. 8M-3020 [8] DOWEL  
8. 0T-0200 [1] PLUG  
9. 1S-7101 [2] BEARING  
10. 1S-7103 [1] BEARING  
11. [1] PLATE (Name)  
    (Parts of 1S7084 Housing Assem.)
12. 7B-3028 [4] SCREW  
13. 1B-5174 [2] PLUG  
14. 2S-6958 [4] PIN  
15. 1S-7595 [1] SLEEVE  
16. 1S-7315 [1] BEARING  
17. 6F-0984 [1] DOWEL  
18. 7M-5839 [1] PLUG  
    (Parts of 1S7084 Housing Assem.)
19. 1S-9481 [1] COVER  
20. 1B-7182 [1] BOLT  
  3B-4505 [1] LOCKWASHER  
21. 4B-4277 [1] WASHER  
22. 1S-9546 [1] GASKET  
23. 8F-0394 [1] SPRING  
24. 1S-9480 [1] PIN  
25. 2S-8084 [1] RACK  
26. 0S-1617 [2] BOLT  
  2S-4068 [1] LOCK  
27. 1S-7316 [1] PLATE  
28. 4S-7794 [1] CAMSHAFT ASSEM.  
29. 4S-5662 [1] PIN  
    (Part of 4S7794 Camshaft Assem.)
 

#UE0700420087
 

3S-9620: FUEL PUMP HOUSING GROUP

3S9620 FUEL PUMP HOUSING GROUP--Part 2 of 2
Serial No. 23H1 to 778, 780 to 784, 786 to 789, 801, 809, 859, 863, 867, 917, 982 and 23H1030 inclusive
Part of Fuel Pump Housing, Drive and Governor shown on Pages 42 and 42A
c78580 UE070042
3S9620 FUEL PUMP HOUSING GROUP Parts scheme
  For full view, you need register

Parts for your 621 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  
    (Part of 2S7020 Cover Assem.)
6. 2A-5222 [2] WASHER  
7. 2A-5220 [1] PLUG  
8. 2M-4314 [8] BUSHING  
9. 0S-1618 [2] BOLT  
  3B-4505 [2] LOCKWASHER  
10. 8H-9204 [8] WASHER  
11. 1S-7339 [1] PIN  
12. 4M-0411 [8] BONNET  
13. 9B-1363 [8] SPRING  
14. 1S-7059 [1] FLANGE  
15. 1S-7057 [1] GASKET  
16. 1M-1077 [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.  
 

#UE0700420088
 

3S-9620: FUEL PUMP HOUSING GROUP

3S9620 FUEL PUMP HOUSING GROUP--Part 1 of 2--Type 1
Serial No. 23H779, 785, 790 to 800, 802 to 808, 810 to 858, 860 to 862, 864 to 866, 868 to 916,
918 to 981, 983 to 1029 and 23H1031-Up. Part of Fuel Pump Housing, Drive and Governor shown on Pages 42 and 42A
c127760 UE070042
3S9620 FUEL PUMP HOUSING GROUP Parts scheme
  For full view, you need register

Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5S-4524 C [1] HOUSING ASSEM.  
2. 9H-4926 [1] FERRULE  
3. 5F-1749 [2] DOWEL  
4. 9H-1296 [1] BEARING  
5. 5M-6214 [1] PLUG  
6. 8M-3019 [8] DOWEL  
7. 8M-3020 [8] DOWEL  
8. 0T-0200 [1] PLUG  
9. 1S-7101 [2] BEARING  
10. 1S-7103 [1] BEARING  
    (Parts of 5S4524 Housing Assem.)
11. 5S-4526 [1] BEARING  
12. 1B-5174 [2] PLUG  
13. 2S-6958 [4] PIN  
14. 1S-7595 [1] SLEEVE  
15. 1S-7315 [1] BEARING  
16. 6F-0984 [1] DOWEL  
17. 7M-5839 [1] PLUG  
    (Parts of 5S4524 Housing Assem.)
18. 1S-9481 [1] COVER  
19. 1B-7182 [1] BOLT  
  3B-4505 [1] LOCKWASHER  
20. 1S-7316 [1] PLATE  
21. 4B-4277 [1] WASHER  
22. 1S-9546 [1] GASKET  
23. 8F-0394 [1] SPRING  
24. 1S-9480 [1] PIN  
25. 2S-8084 [1] RACK  
26. 0S-1617 [2] BOLT  
  2S-4068 [1] LOCK  
27. 4S-7794 [1] CAMSHAFT ASSEM.  
28. 4S-5662 [1] PIN  
    (Part of 4S7794 Camshaft Assem.)
  C   INDICATES CHANGE FROM PREVIOUS
 

#UE0700420089
 

3S-9620: FUEL PUMP HOUSING GROUP

3S9620 FUEL PUMP HOUSING GROUP--Part 2 of 2--Type 1
Serial No. 23H779, 785, 790 to 800, 802 to 808, 810 to 858, 860 to 862, 864 to 866, 868 to 916,
918 to 981, 983 to 1029 and 23H1031-Up. Part of Fuel Pump Housing, Drive and Governor shown on Pages 42 and 42A
c127731 UE070042
3S9620 FUEL PUMP HOUSING GROUP Parts scheme
  For full view, you need register

Parts for your 621 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  
    (Part of 2S7020 Assem.)
6. 2A-5222 C [1] WASHER  
7. 2A-5220 [1] PLUG  
8. 2M-4314 [8] BUSHING  
9. 1B-7182 C [2] BOLT  
  3B-4505 [2] LOCKWASHER  
10. 8H-9204 [8] WASHER  
11. 8S-0218 C [1] PIN ASSEM.  
12. 4M-0411 [8] BONNET  
13. 9B-1363 [8] SPRING  
14. 8S-0219 C [1] FLANGE  
15. 1S-7057 C [2] GASKET  
16. 1M-1077 [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 FROM PREVIOUS
 

Information:

Disassembly and Assembly
Fuel Ratio Control
621 & 623 TRACTOR-SCRAPER ENGINE
Service Magazine
Cat® Reman Announces New Fuel Pump, Fuel Ratio Control, and Fuel Injector Options for Certain Machine Engines {1251, 1278}
2014/09/04
Cat<SUP>&reg;</SUP> Reman Announces Additions to the Fuel Air Ratio Controls Portfolio for Certain Machine Applications {1278}
2015/06/25

Caterpillar Parts SIS Catalog 621 :

FUEL RATIO CONTROL
FUEL RATIO CONTROL
FUEL RATIO CONTROL
FUEL RATIO CONTROL
PRIMARY FUEL FILTER AND LINES
PRIMARY FUEL FILTER AND LINES
FUEL RATIO CONTROL
FUEL RATIO CONTROL
GOVERNOR CONTROL
GOVERNOR CONTROL
BASIC GOVERNOR GROUP
1S-7959 BASIC GOVERNOR GROUP
BASIC GOVERNOR GROUP
1S-7959 BASIC GOVERNOR GROUP
BASIC GOVERNOR GROUP
1S-7959 BASIC GOVERNOR GROUP
FILTER GP-FUEL
8H-7204 FILTER GP-FUEL
FUEL PRIMING PUMP GROUP
FUEL PRIMING PUMP GROUP
PUMP AS-FUEL PRIMING
2S-0308 PUMP AS-FUEL PRIMING
FUEL TRANSFER PUMP GROUP
4S-5661 FUEL TRANSFER PUMP GROUP
FUEL FILTER
1S-8648 FUEL FILTER
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

Truck sale:

Caterpillar 621K WT, water trucks, Transport
699,500 
Caterpillar 621K WT, water trucks, Transport
- water trucks
HOLT OF CALIFORNIA
Caterpillar 621K, Road Scraper, Construction
379,500 
Caterpillar 621K, Road Scraper, Construction
- Road Scraper
ALTORFER INC.
 
826,455 
Caterpillar 621K, Road Scraper, Construction


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500,000 
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HOLT CAT
Caterpillar 621K, Road Scraper, Construction
435,000 
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CAROLINA CAT
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