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GAUGES Effective with Serial No. 23H217 621 WHEEL TRACTOR


OPERATOR STATION
PANEL GP
AIR INLET AND EXHAUST SYSTEM
MUFFLER GP
FRAME AND BODY
HOOD GP
FUEL SYSTEM
DRIVE GP-TACHOMETER
OPERATOR STATION
PANEL GP
FUEL SYSTEM
DRIVE GP-TACHOMETER
COOLING SYSTEM
LINES GP-WATER
ELECTRICAL AND STARTING SYSTEM
STARTING AR

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

OPERATOR STATION

PANEL GP
GAUGES
GAUGES
GAUGES
GAUGES
SERVICE METER GROUP
3S-7229 SERVICE METER GROUP
INSTRUMENT PANEL PROTECTION GROUP
4D-5477 INSTRUMENT PANEL PROTECTION GROUP
 

#UE0700420100
 

GAUGES

GAUGES
Effective with Serial No. 23H217
c120247 UE070042
None GAUGES Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5D-0746 [1] PANEL  
2. 3D-5073 [2] SEAL  
3. 5M-1065 [1] GAUGE (Oil Pressure)  
  3D-2675 [1] COUPLING  
4. 3K-0443 [1] GAUGE (Air Pressure)  
5. 1L-6561 [1] PLUG  
6. 5D-7842 [1] PANEL  
7. 5S-8167 [1] TACHOMETER ASSEM.  
  5H-4131 [1] KEY  
    (Part of 5S8167 Tachometer Assem.)
8. 5S-9068 [1] GAUGE (Fuel Pressure)  
  3B-7763 [1] COUPLING  
9. 5H-4778 [1] UNION  
10. 3D-8929 [1] HOSE ASSEM. (24.25" long overall)  
11. 5B-1959 [1] ADAPTER  
  2B-5721 [1] GASKET  
12. 4D-2560 [2] UNION  
13. 7H-9899 [1] GASKET  
14. 4B-6029 [2] GROMMET  
15. 4B-0418 [2] CLIP  
16. 4D-6463 [1] CLIP  
17. 3B-6487 [1] COUPLING  
18. 6H-6699 [1] ADAPTER  
19. 8M-2772 [2] CLIP  
20. 5D-6119 [1] HOSE ASSEM. (122" long overall)  
21. 0T-0102 [1] BOLT  
  3B-4506 [1] LOCKWASHER  
22. 4D-6463 [1] CLIP  
23. 6H-4005 [4] GROMMET  
24. 1S-9389 [1] CABLE ASSEM.  
25. 4D-1848 [1] INDICATOR (converter temperature)  
26. 1H-3337 [8] BOLT  
  3D-5074 [8] NUT  
  4D-3397 [2] STRAP  
27. 7F-6429 [1] AMMETER  
28. 3S-4824 [1] INDICATOR (heat)  
29. 3B-7285 [1] NIPPLE  
30. 2D-1683 [1] FITTING  
 

#UE0700420101
 

8S-6763: MUFFLER GROUP

8S6763 MUFFLER GROUP
AN ATTACHMENT
c105186 UE070042
8S6763 MUFFLER GROUP Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 8S-6782 [1] ADAPTER  
2. 0S-1571 [2] BOLT  
3. 1B-5355 [2] NUT  
4. 8S-6558 [1] MUFFLER ASSEM.  
5. 6F-8814 [1] CLAMP  
6. 8S-6750 [1] ELBOW  
7. 6D-8741 [1] HOOD ASSEM.  
8. 0T-0537 [4] FASTENER  
9. 4B-4312 [12] RIVET  
10. 2D-9335 [4] PLATE  
    (Parts of 6D8741 Hood Assem.)
11. 8S-6783 [1] CLAMP  
 

#UE0700420102
 

HOOD AND EXHAUST EXTENSION

HOOD AND EXHAUST EXTENSION
Refer also to Pages 163 and 181 for special parts
c124870 UE070042
None HOOD AND EXHAUST EXTENSION Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5D-5925 [1] HOOD ASSEM.  
2. 2D-9335 [4] PLATE  
3. 5D-6019 [3] STRIP  
4. 4B-4312 [12] RIVET  
5. 0T-0537 [4] FASTENER ASSEM.  
    (Parts of 5D5925 Assem.)
6. 5H-7292 [1] CLAMP  
7. 5D-0197 [1] PIPE  
8. 0S-1587 [1] BOLT  
  1B-5357 [1] NUT  
9. 5D-6012 [1] DOOR ASSEM.  
10. 4B-4311 [2] RIVET  
11. 4B-4312 [3] RIVET  
12. 0T-0537 [1] FASTENER ASSEM.  
13. 2D-9335 [1] PLATE  
14. 3D-2735 [1] PLATE  
  6F-7013 [1] HANDLE  
    (Parts of 5D6012 Assem.)
15. 7D-3170 [1] DOOR ASSEM.  
16. 4B-4311 [2] RIVET  
17. 6F-7013 [1] HANDLE  
18. 3D-2735 [1] PLATE  
19. 4B-4312 [3] RIVET  
20. 0T-0537 [1] FASTENER ASSEM.  
21. 5D-5927 [1] INSULATION  
    (Parts of 7D3170 Assem.)
22. 0S-1588 [4] BOLT  
23. 3B-4506 [8] LOCKWASHER  
24. 5D-5653 [1] BRACKET  
25. 0L-1351 [4] BOLT  
26. 5D-6055 [1] BRACKET ASSEM.  
27. 4D-2619 [1] BEARING  
    (Part of 5D6055 Assem.)
28. 5D-6016 [1] PLATE ASSEM.  
29. 5D-6013 [2] LUG  
30. 5H-3948 [1] BLOCK  
    (Parts of 5D6016 Assem.)
 

#UE0700420103
 

SERVICE METER AND TACHOMETER DRIVE

SERVICE METER AND TACHOMETER DRIVE
Serial No. 23H1 to 1167, 1169, 1170, 1172, 1173, 1176, 1177, 1181,
1183, 1185 and 23H1187 inclusive
c78920 UE070042
None SERVICE METER AND TACHOMETER DRIVE Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3S-7123 [1] ADAPTER ASSEM.  
2. 8M-1051 [1] SEAL  
3. 2S-1270 [1] BEARING  
    (Parts of 3S7123 Adapter Assem.)
4. 3S-7230 Y [1] TACHOMETER DRIVE GROUP  
    (See Separate Illustration)
5. 4F-7391 [1] SEAL  
6. 3S-7229 Y [1] SERVICE METER GROUP  
    (See Separate Illustration)
7. 0S-1618 [7] BOLT (1" Long)  
8. 1D-4539 [1] BOLT (2.50" Long)  
9. 3B-4505 [9] LOCKWASHER  
10. 1D-4538 [1] BOLT (2.25" Long)  
11. 2S-8141 [1] GASKET  
12. 1S-5958 [1] GASKET  
  Y   SEPARATE ILLUSTRATION
 

#UE0700420104
 

3S-7229: SERVICE METER GROUP

3S7229 SERVICE METER GROUP
Part of Service Meter and Tachometer Drive
c78921 UE070042
3S7229 SERVICE METER GROUP Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
  2S-0403 [1] HOUSING ASSEM.  
  8H-5261 [1] GEAR (40 TEETH)  
  1F-3539 [1] PIN  
    (PARTS OF COUNTER ASSEM. 8H5262)
  9B-2232 [1] CAP  
  2S-1270 [1] BEARING  
    (PART OF HOUSING ASSEM. 2S403)
  9M-3866 [1] GASKET  
  4S-7001 [1] RETAINER ASSEM.  
  5B-6904 [1] SPRING  
    (PART OF RETAINER ASSEM. 4S7001)
  8H-5262 [1] COUNTER ASSEM.  
  8H-5961 [1] COUNTER  
    (PART OF COUNTER ASSEM. 8H5262)
  9M-7660 [1] GASKET  
  8H-5124 [1] PLATE  
  7B-3028 [2] SCREW  
    (PARTS OF HOUSING ASSEM. 2S403)
  3S-6631 [1] SHAFT  
  9M-4256 [1] BEARING  
    (PART OF HOUSING ASSEM. 2S403)
  1S-3365 [1] WINDOW  
  3S-9557 [4] SCREW  
 

#UE0700420105
 

SERVICE METER AND TACHOMETER DRIVE

SERVICE METER AND TACHOMETER DRIVE
Serial No. 23A1168, 1171, 1174, 1175, 1178 to 1180, 1182,
1184, 1186 and 23H1188-up
3S7230 Tachometer Drive Group parts are shown on Page 61
c122527 UE070042
None SERVICE METER AND TACHOMETER DRIVE Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5S-3023 [1] ADAPTER ASSEM.  
2. 8M-1051 [1] SEAL  
3. 2S-1270 [1] BEARING  
    (Parts of 5S3023 Adapter Assem.)
4. 3S-7230 Y [1] TACHOMETER DRIVE GROUP  
    (See Separate Illustration)
5. 4F-7391 [1] SEAL  
6. 3S-7229 Y [1] SERVICE METER GROUP  
    (See Separate Illustration)
7. 0S-1618 [6] BOLT (1" Long)  
8. 1D-4539 [1] BOLT (2.50" Long)  
9. 3B-4505 [9] LOCKWASHER  
10. 1D-4538 [1] BOLT (2.25" Long)  
11. 5S-3024 [1] GASKET  
12. 1S-5958 [1] GASKET  
13. 1F-5842 [1] BOLT (3.75" Long)  
  Y   SEPARATE ILLUSTRATION
 

#UE0700420106
 

3S-7230: TACHOMETER DRIVE GROUP

3S7230 TACHOMETER DRIVE GROUP
Serial No. 23H1 to 1167, 1169, 1170, 1172, 1173, 1176, 1177, 1181,
1183, 1185 and 23H1187 inclusive
Part of Service Meter and Tachometer Drive
c78922 UE070042
3S7230 TACHOMETER DRIVE GROUP Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3S-6637 [1] SHAFT ASSEM.  
2. 3S-6615 [1] HOUSING  
  2B-4602 [1] PLUG  
3. 2S-8153 [1] BEARING  
4. 4L-8395 [14] SHIM  
5. 4L-8082 [1] SHAFT ASSEM.  
6. 3S-8480 [1] HOUSING ASSEM.  
7. 1F-0904 [1] BUSHING  
    (Part of 3S8480 Housing Assem.)
 

#UE0700420107
 

3S-7230: TACHOMETER DRIVE GROUP

3S7230 TACHOMETER DRIVE GROUP
Serial No. 23H1168, 1171, 1174, 1175, 1178 to 1180, 1182, 1184, 1186 and 23H1188-Up
Part of Service Meter and Tachometer Drive shown on Page 60A
c122528 UE070042
3S7230 TACHOMETER DRIVE GROUP Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3S-6637 [1] SHAFT ASSEM.  
2. 5S-2951 [1] HOUSING  
  2B-4602 [1] PLUG  
3. 2S-8153 [1] BEARING  
4. 4L-8395 [14] SHIM  
5. 4L-8082 [1] SHAFT ASSEM.  
6. 3S-8480 [1] HOUSING ASSEM.  
7. 1F-0904 [1] BUSHING  
    (Part of 3S8480 Housing Assem.)
 

#UE0700420108
 

WATER LINES

WATER LINES
c78918 UE070042
None WATER LINES Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 2A-3541 [1] GASKET  
2. 1A-2029 [12] BOLT  
3. 3B-4506 [14] LOCKWASHER  
4. 1S-5067 [1] TUBE ASSEM.  
    (To Starting Engine Cylinder Head)
5. 2S-0015 [1] GASKET  
6. 1S-5130 [2] HOSE  
7. 9M-7958 [4] CLAMP  
8. 2S-0303 [1] GASKET  
9. 1S-5070 [1] TUBE ASSEM.  
    (To Diesel Engine Cylinder Head)
10. 0L-1143 [2] BOLT  
11. 1S-5081 [1] TUBE ASSEM.  
    (To Diesel Engine Cylinder Block)
12. 1S-5078 [1] TUBE ASSEM.  
    (To Starting Engine Cylinder Block)
13. 8M-4403 [1] GASKET  
 

#UE0700420109
 

CYLINDER BLOCK, CYLINDER HEAD AND VALVE MECHANISM

CYLINDER BLOCK, CYLINDER HEAD AND VALVE MECHANISM--Part 1 of 2
c97070 UE070042
None CYLINDER BLOCK, CYLINDER HEAD AND VALVE MECHANISM Parts scheme
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Parts for your 621 WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 8H-9785 [1] BREATHER ASSEM.  
2. 3S-6318 [1] SHIELD ASSEM.  
3. 2A-3397 [1] CAP  
  5B-3265 [1] GASKET  
4. 2S-0918 [1] GAUGE ASSEM.  
5. 9M-4202 [1] PLUG  
  4B-8407 [1] GASKET  
6. 3S-9555 [2] GASKET  
7. 0S-1571 [2] BOLT  
8. 3B-4506 [28] LOCKWASHER  
9. 0L-2070 [4] BOLT  
10. 0S-0509 [1] BOLT  
  7F-7510 [1] LOCK  
11. 3S-2370 [1] TUBE ASSEM. (To Oil Pump)  
12. 3S-9550 [1] PAN ASSEM.  
  0T-0398 [1] STUD  
13. 2B-7408 [1] PLUG  
14. 0L-1022 [1] PLUG  
15. 8M-5039 [1] TUBE  
16. 5H-4211 [1] BUSHING  
    (Parts of 3S9550 Pan Assem.)
17. 5H-4212 [1] PLUG  
18. 4B-6074 [4] NUT  
  3B-4611 [4] COTTER PIN  
19. 3S-9556 [1] GASKET  
20. 1A-2029 [2] BOLT  
21. 3H-0107 [2] SEAL  
22. 2S-9969 [1] FILTER ASSEM.  
23. [1] BOLT  
24. 4B-4278 [1] WASHER  
25. 3S-9554 [1] HOUSING ASSEM.  
  5M-6214 [2] PLUG  
26. 9M-8776 [1] STUD  
27. 1S-9940 [1] BEARING  
28. 8M-9321 [1] BEARING  
    (Parts of 3S9554 Housing Assem.)
29. 1B-4203 [2] NUT  
  8M-7587 [2] LOCK  
30. 0S-1619 [2] BOLT  
31. 0S-1608 [1] BOLT  
32. 0L-1143 [11] BOLT  
33. 0S-1594 [3] BOLT  
34. 5S-0228 [1] COVER  
35. 8M-5031 [1] GASKET  
36. 1F-3222 [1] GASKET  
37. 0L-1351 [2] BOLT  
38. 2S-8760 [1] TUBE ASSEM.  
 

Information:

Engine News
New CAT Inspect Form Available for EMCP Troubleshooting and Inspection {0374, 4490, 7451, 7620}
New CAT Inspect Form Available for EMCP Troubleshooting and Inspection {0374, 4490, 7451, 7620}
Service Letter-NACD
Certain 7N4160 Switch Groups And 9W1077 Switch Assemblies Need To Be Removed From Parts Stock
Certain 7N4160 Switch Groups And 9W1077 Switch Assemblies Need To Be Removed From Parts Stock
Service Letter-Australia
Service Letter-CFEL
Service Letter-CSARL
Service Letter-Americas
Service Letter-Brazil
Service Letter-Truck/Ag/Marine
Service Letter-China
Service Letter-Asia
Service Letter-APD
Disassembly and Assembly
Dash
621 TRACTOR-SCRAPER VEHICLE SYSTEMS
Dash
621 & 623 TRACTOR-SCRAPER ENGINE
Dash
J621 ELEVATING SCRAPER VEHICLE SYSTEMS
Service Magazine
Improved Hose Is Now Available For Use In The Fuel Pressure Gauge Line{7456,1274}
1979/06/04
Improved 9W1077 Start Switch Assembly And 7N4160 Heat Start Switch Group{1416}
1990/12/10
Service Meter Adjustment Is Now Available in VisionLink<SUP>TM</SUP> {7478, 7606}
2014/08/20

Caterpillar Parts SIS Catalog 621 :

GAUGES
GAUGES
OIL PUMP ASSEMBLY
1S-9523 OIL PUMP ASSEMBLY
OIL PUMP AND DRIVE
OIL PUMP AND DRIVE
OIL FILTER ASSEMBLY
1S-5132 OIL FILTER ASSEMBLY
OIL LINES
OIL LINES
FUEL INJECTION VALVES AND LINES
FUEL INJECTION VALVES AND LINES
FUEL INJECTION VALVES AND LINES
FUEL INJECTION VALVES AND LINES
FUEL INJECTION VALVES AND LINES
FUEL INJECTION VALVES AND LINES
MUFFLER GROUP
8S-6763 MUFFLER GROUP
HOOD AND EXHAUST EXTENSION
HOOD AND EXHAUST EXTENSION
SERVICE METER AND TACHOMETER DRIVE
SERVICE METER AND TACHOMETER DRIVE
SERVICE METER GROUP
3S-7229 SERVICE METER GROUP
SERVICE METER AND TACHOMETER DRIVE
SERVICE METER AND TACHOMETER DRIVE
TACHOMETER DRIVE GROUP
3S-7230 TACHOMETER DRIVE GROUP
TACHOMETER DRIVE GROUP
3S-7230 TACHOMETER DRIVE GROUP
WATER LINES
WATER LINES

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