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4N6954 AIR COMPRESSOR GROUP Serial No. 70V2764 to 70V2944 and 70V2966 to 70V4932 inclusive Part of 4N2275 Air Compressor Group shown on Page 51A 621B


BASIC ENGINE
AIR COMPRESSOR GP
AIR INLET AND EXHAUST SYSTEM
AFTERCOOLER GP

WHEEL TRACTOR 621B WHEEL TRACTOR 45P
 3406 VEHICULAR ENGINE 45P00001-UP (MACHINE) UEG0835S 621B 45P   (1973)

BASIC ENGINE

AIR COMPRESSOR GP
AIR COMPRESSOR GP
7N-6294 AIR COMPRESSOR GP
AIR COMPRESSOR GROUP
4N-1563 AIR COMPRESSOR GROUP
AIR COMPRESSOR GP
4N-6954 AIR COMPRESSOR GP
AIR COMPRESSOR GP
7N-4014 AIR COMPRESSOR GP
AIR COMPRESSOR LINES GROUP
4N-2285 AIR COMPRESSOR LINES GROUP
AIR COMPRESSOR LINES GROUP
4N-2285 AIR COMPRESSOR LINES GROUP
 

#UEG0835S0150
 

4N-6954: AIR COMPRESSOR GP

4N6954 AIR COMPRESSOR GROUP
Serial No. 70V2764 to 70V2944 and 70V2966 to 70V4932 inclusive
Part of 4N2275 Air Compressor Group shown on Page 51A
c221706 UEG0835S
4N6954 AIR COMPRESSOR GP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 6N-2103 [1] CRANKSHAFT ASSEM.  
    (Includes)
  9F-2247 C [1] PLUG  
2. 6N-2102 [1] ADAPTER ASSEM.  
3. 9F-2247 [1] PLUG  
4. 3L-0526 C [4] BOLT  
5. 6N-2097 [1] HEAD ASSEM. (air compressor)  
  3J-5390 [1] PLUG  
6. 3J-5389 [2] PLUG  
7. 6N-2098 [1] GASKET  
8. 2B-2695 [2] BOLT  
  3B-4505 [2] LOCKWASHER  
9. 8M-7065 C [1] GASKET  
10. 5M-6509 C [2] SEAL  
11. 7N-4837 C [2] PISTON ASSEM.  
12. 5M-6214 [2] PLUG  
13. 6N-2100 [2] COVER ASSEM.  
14. 6N-2106 [2] ROD ASSEM.  
15. 6N-0634 [1] GASKET  
16. 6N-2101 [1] COVER  
17. 0L-1351 C [6] BOLT  
  3B-4506 [6] LOCKWASHER  
18. 9M-0397 [1] ADAPTER  
19. 0S-1619 C [6] BOLT  
20. 5P-0060 C [4] BOLT  
21. 3B-4507 C [8] LOCKWASHER  
22. 7N-0243 C [2] LOCK  
23. 8N-3665 C [1] KIT (seal)  
    (Includes o-rings)
24. 6N-2099 [1] CRANKCASE ASSEM.  
    (Includes)
25. 7N-6172 C [2] BUSHING  
26. 9M-0381 C [2] SEAT  
    THE FOLLOWING REPAIR KITS ARE AVAILABLE:
  8N-3666 C [1] KIT (compressor)  
    (Includes pistons, guides,
    plunger, seat, spring, saddle, rings,
    bolts, lockwashers, washers, lock,
    bearing, valves, gasket & buttons)
  6N-2109 [1] KIT (piston ring)  
  C   INDICATES CHANGE
 

#UEG0835S0151
 

7N-4014: AIR COMPRESSOR GP

7N4014 AIR COMPRESSOR GROUP
Serial No. 70V4933-Up
Part of 7N6294 Air Compressor Group shown on Page 51A-1
c171633 UEG0835S
7N4014 AIR COMPRESSOR GP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 7N-7448 [1] GASKET  
2. 7N-7447 [1] HEAD ASSEM.  
3. 0S-1619 [5] BOLT  
4. 7N-7449 [1] ADAPTER  
  1S-7107 [1] GASKET  
5. 0L-1352 [1] BOLT  
  5M-2894 [1] WASHER  
6. 2B-2695 [4] BOLT  
7. 3B-4505 [10] LOCKWASHER  
8. 7N-7450 [1] COVER  
  7N-7451 [1] GASKET  
9. 0S-1615 [2] BOLT  
  3B-4504 [2] LOCKWASHER  
10. 2B-0858 [1] PLUG  
11. 7N-9707 [1] COVER  
  7N-7442 [1] GASKET  
12. 9M-0397 [1] ADAPTER  
13. 034-4160 [4] BOLT  
14. 7N-7444 [2] ROD ASSEM.  
15. 0S-1617 [6] BOLT  
16. 7N-9706 [1] PLATE  
  7N-7440 [1] GASKET  
17. 8H-9789 [2] BEARING  
18. 7N-9708 [1] CRANKSHAFT  
19. 7N-9709 [1] CRANKCASE  
20. 1A-2029 [6] BOLT  
  3B-4506 [6] LOCKWASHER  
21. 4B-4845 [2] PLUG  
22. 7N-7445 [1] BLOCK  
  7N-7446 [1] GASKET  
23. 7N-7443 [2] PISTON ASSEM.  
    THE FOLLOWING REPAIR KITS ARE AVAILABLE:
  7N-7435 [1] KIT (major repair)  
    (Includes Stops, Springs, Seats, Guides, Gaskets ect.)
  7N-7436 [1] KIT (piston rings)  
 

#UEG0835S0152
 

4N-2285: AIR COMPRESSOR LINES GROUP

4N2285 AIR COMPRESSOR LINES GROUP
Serial No. 70V1 to 70V726 inclusive
c201813 UEG0835S
4N2285 AIR COMPRESSOR LINES GROUP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 032-1269 [2] ELBOW  
2. 4N-4937 [1] HOSE ASSEM. (31.25 in. long)  
3. 7L-7262 C [1] ELBOW  
4. 4N-4936 [1] HOSE ASSEM. (19 in. long)  
5. 4N-1875 [1] HOSE ASSEM. (9.38 in. long)  
6. 2N-3378 [1] ELBOW  
7. 001-7043 [2] ELBOW  
8. 0S-1618 [2] BOLT  
  3B-4505 [2] LOCKWASHER  
9. 9M-0397 [1] ADAPTER  
  9M-0385 [1] PLATE  
  6L-1884 [2] GASKET  
10. 7K-1181 C [1] STRAP  
11. 4N-4935 [1] HOSE ASSEM. (15.75 in. long)  
12. 3L-1850 C [1] PLUG  
13. 1Y-0413 [1] TEE  
14. 3B-7744 C [1] NIPPLE  
15. 8M-0755 C [1] CONNECTOR  
  C   INDICATES CHANGE
 

#UEG0835S0153
 

4N-2285: AIR COMPRESSOR LINES GROUP

4N2285 AIR COMPRESSOR LINES GROUP
Serial No. 70V727 to 70V2763 inclusive
c161502 UEG0835S
4N2285 AIR COMPRESSOR LINES GROUP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 032-1269 [2] ELBOW  
2. 4N-4937 [1] HOSE ASSEM. 79.40 cm(31.25 in.)  
3. 7L-7262 [1] ELBOW  
4. 4N-4936 [1] HOSE ASSEM. 48.30 cm(19 in.)  
5. 4N-1875 [1] HOSE ASSEM. 23.80 cm(9.38 in.)  
6. 005-4173 C [1] ELBOW  
  2M-9780 [1] SEAL  
7. 001-7043 [2] ELBOW  
8. 0S-1617 C [2] BOLT  
9. 9M-0397 [1] ADAPTER  
  9M-0385 [1] PLATE  
  6L-1884 [2] GASKET  
10. 7K-1181 [1] STRAP  
11. 4N-4935 [1] HOSE ASSEM. 40 cm(15.75 in.)  
12. 2B-0858 C [1] PLUG  
13. 1Y-0413 [1] TEE  
14. 3B-7744 [1] NIPPLE  
15. 8M-0755 [1] CONNECTOR  
  C   INDICATES CHANGE
 

#UEG0835S0154
 

9L-6971: LINES GP-AIR COMPRESSOR

9L6971 AIR COMPRESSOR LINES GROUP
Serial No. 70V2764 to 70V4932 inclusive
c216381 UEG0835S
9L6971 LINES GP-AIR COMPRESSOR Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3B-7744 [1] NIPPLE  
2. 1Y-0413 [1] TEE  
3. 032-1269 [2] ELBOW  
4. 2B-0858 [1] PLUG  
5. 001-7043 C [3] ELBOW  
6. 4N-4937 C [1] HOSE ASSEM. 48.30cm(19.02 in.)  
7. 8M-0755 [1] CONNECTOR  
8. 2M-9780 C [1] SEAL  
9. 4N-1875 C [1] HOSE ASSEM. 21.70cm(8.54 in.)  
10. 005-4173 C [1] ELBOW  
11. 4N-1875 [1] HOSE ASSEM. 21.70 cm(8.54 in.)  
12. 4N-4935 HOSE ASSEM. 40.0 cm(15.75 in.)  
  C   INDICATES CHANGE
 

#UEG0835S0155
 

9L-6971: LINES GP-AIR COMPRESSOR

9L6971 AIR COMPRESSOR LINES GROUP
Serial No. 70V4933-Up
c228047 UEG0835S
9L6971 LINES GP-AIR COMPRESSOR Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3B-7744 [1] NIPPLE-CLOSE  
2. 1Y-0413 [1] TEE  
3. 032-1269 [2] ELBOW-FLARED  
4. 2B-0858 [1] PLUG-PIPE  
5. 001-7043 [3] ELBOW  
6. 4N-4935 I [1] HOSE AS-END 40CM(15.75IN)  
7. 8M-0755 [1] CONNECTOR  
8. 2M-9780 [1] SEAL-O-RING  
9. 4N-1875 I [1] HOSE AS-END 21.70CM(8.54IN)  
10. 005-4173 [1] ELBOW  
11. 4N-1875 I [1] HOSE AS-END 21.70CM(8.54IN)  
12. 4N-4937 CI [1] HOSE AS-END 48.3CM(19IN)  
13. 061-6746 [2] FITTING AS  
  C   CHANGE FROM PREVIOUS TYPE
  I   SEE HOSE FABRICATION GUIDE
 

#UEG0835S0156
 

4N-9610: AIR COMPRESSOR LINES GROUP

4N9610 AIR COMPRESSOR LINES GROUP
Serial No. 70V1 to 70V724 inclusive
c201444 UEG0835S
4N9610 AIR COMPRESSOR LINES GROUP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 032-1269 [2] ELBOW  
2. 4N-4937 [1] HOSE ASSEM. (31.25 in. long)  
3. 7L-7262 [2] ELBOW  
4. 4N-4936 [1] HOSE ASSEM. (19 in. long)  
5. 4N-1875 [1] HOSE ASSEM. (9.38 in. long)  
6. 2N-3378 [1] ELBOW  
7. 001-7043 [2] ELBOW  
8. 0S-1618 [2] BOLT  
  3B-4505 [2] LOCKWASHER  
9. 9M-0397 [1] ADAPTER  
  9M-0385 [1] PLATE  
  6L-1884 [2] GASKET  
10. 6D-4246 [1] CLIP  
11. 4N-4935 [1] HOSE ASSEM. (15.75 in. long)  
12. 2B-0858 C [1] PLUG  
13. 1Y-0413 [1] TEE  
14. 3B-7744 C [1] NIPPLE  
  C   INDICATES CHANGE
 

#UEG0835S0157
 

4N-9610: AIR COMPRESSOR LINES GROUP

4N9610 AIR COMPRESSOR LINES GROUP
Serial No. 70V725 to 70V1493 inclusive
c150767 UEG0835S
4N9610 AIR COMPRESSOR LINES GROUP Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 032-1269 [2] ELBOW  
2. 4N-4937 [1] HOSE ASSEM. (31.25 in. long)  
3. 7L-7262 [2] ELBOW  
4. 4N-4936 [1] HOSE ASSEM. (19 in. long)  
5. 4N-1875 [1] HOSE ASSEM. (9.38 in. long)  
6. 005-4173 C [1] ELBOW  
7. 001-7043 [2] ELBOW  
8. 0S-1617 C [2] BOLT  
9. 9M-0397 [1] ADAPTER  
  9M-0385 [1] PLATE  
  6L-1884 [2] GASKET  
10. 2M-9780 C [1] SEAL  
11. 4N-4935 [1] HOSE ASSEM. (15.75 in. long)  
12. 2B-0858 [1] PLUG  
13. 1Y-0413 [1] TEE  
14. 3B-7744 [1] NIPPLE  
  C   INDICATES CHANGE
 

#UEG0835S0158
 

4N-9010: AFTERCOOLER GP-WATER

4N9010 AFTERCOOLER GROUP
Serial No. 70V1 to 70V778 inclusive
c202038 UEG0835S
4N9010 AFTERCOOLER GP-WATER Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 1B-9575 [26] BOLT  
2. 9M-1974 [26] WASHER  
3. 4N-9005 [1] COVER  
4. 5M-6213 [1] PLUG  
5. 9F-8999 [4] BOLT  
  2P-3261 [4] NUT  
6. 4B-4278 [3] WASHER  
7. 4N-1323 [1] COVER  
8. 4N-1320 [2] GASKET  
9. 4N-1324 [1] ADAPTER  
10. 0L-1319 [1] WASHER  
11. 4N-9008 [2] GASKET  
12. 4N-4188 [2] GASKET  
13. 1A-9579 [8] BOLT  
14. 3B-4505 [8] LOCKWASHER  
15. 4N-4193 [2] ADAPTER  
16. 9M-7002 [2] SEAL  
17. 1S-9544 [2] SEAL  
18. 6N-0600 C [1] CORE ASSEM.  
19. 4N-9007 [1] HOUSING  
20. 5M-6214 [2] PLUG  
21. 2N-8204 [6] GASKET  
22. 3J-5389 [1] PLUG  
23. 2P-3203 [11] BOLT  
24. 2P-3205 [1] BOLT  
  C   INDICATES CHANGE
 

#UEG0835S0159
 

4N-9010: AFTERCOOLER GP-WATER

4N9010 AFTERCOOLER GROUP
Serial No. 70V779-Up
c218422 UEG0835S
4N9010 AFTERCOOLER GP-WATER Parts scheme
  For full view, you need register

Parts for your 621B WHEEL TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 1B-9575 C [34] BOLT  
2. 9M-1974 C [26] WASHER  
3. 4N-9005 [1] COVER  
4. 5M-6213 [1] PLUG  
5. 9F-8999 [4] BOLT  
  1D-4717 [4] NUT  
6. 5M-2894 C [7] WASHER  
7. 4N-1323 [1] COVER  
8. 4N-1320 [2] GASKET  
9. 4N-1324 [1] ADAPTER  
10. 2S-6160 [1] WASHER  
11. 4N-9008 [2] GASKET  
12. 4N-4188 [2] GASKET  
13. 0S-1571 C [1] BOLT  
14. 4N-7807 C [2] ADAPTER  
15. 4N-4193 [2] ADAPTER  
16. 9M-7002 [2] SEAL  
17. 5P-7204 C [2] SEAL  
18. 6N-7945 C [1] CORE ASSEM.  
19. 4N-9007 [1] HOUSING  
20. 5M-6214 CB [3] PLUG (use as required)  
21. 2N-8204 [6] GASKET  
22. 3J-5389 [1] PLUG  
23. 0S-1588 CB [11] BOLT (use as required)  
  B   USE AS REQUIRED
  C   INDICATES CHANGE
 

Information:

General Service Information
Tu-Flo 300 Compressor
AIR COMPRESSORS TU-FLO 300, 400, 500, 501, 600, 700 & 1000 C
Tu-Flo 400, 500, 1000 Compressors
AIR COMPRESSORS TU-FLO 300, 400, 500, 501, 600, 700 & 1000 C
Tu-Flo 501 Compressor
AIR COMPRESSORS TU-FLO 300, 400, 500, 501, 600, 700 & 1000 C
Tu-Flo 600 Compressor
AIR COMPRESSORS TU-FLO 300, 400, 500, 501, 600, 700 & 1000 C
Tu-Flo 700 Compressor
AIR COMPRESSORS TU-FLO 300, 400, 500, 501, 600, 700 & 1000 C
EL-740 Air Compressor
MIDLAND AIR COMPRESSORS
EL-1300/EL-1600 Air Compressors
MIDLAND AIR COMPRESSORS
Truck Engine News
A New Special Instruction , "Troubleshooting Compressed Air System Components and Performance" Is Available {1803, 5500}
2002/09/01
Special Instruction
Air Compressor Installation Instructions{1803}
Air Compressor Installation Instructions{1803}
Troubleshooting Compressed Air System Components and Performance{1803, 5500}
Troubleshooting Compressed Air System Components and Performance{1803, 5500}
Specifications
Air Compressor Drive
3406 ENGINE FOR CATERPILLAR BUILT MACHINES
Air Compressor Governor
621B, 623B & 627B WHEEL TRACTOR-SCRAPERS AIR SYSTEM AND BRAK
Disassembly and Assembly
Air Compressor Governor
3406 VEHICULAR ENGINE FOR 621B & 623B TRACTORS
Air Compressor
3406 VEHICULAR ENGINE FOR 621B & 623B TRACTORS
Air Compressor - Remove and Install - If Equipped
C15 and C18 Engines for Caterpillar Built Machines
Air Compressor Drive Gear - Remove and Install
C15 and C18 Engines for Caterpillar Built Machines
Service Magazine
New Crankshaft Assemblies{1202,1204,1206,1207,1212}
1982/11/01
Air Dryer Available As Attachment{1065,4250}
1977/04/25
Sleeve-Type Ring Compressors Can Be Used For Installation Of Pistons From The Bottom Of The Engine{0622}
1978/08/21
A New Special Instruction, REHS1428 , "Troubleshooting Compressed Air System Components and Performance" Is Available {1803, 5500}
2002/09/23
A New Diagnostic Kit for the Evaluation of Air Compressor Operation is Introduced {1803}
2004/11/15

Caterpillar Parts SIS Catalog 621B :

AIR COMPRESSOR GROUP
4N-1563 AIR COMPRESSOR GROUP
AIR COMPRESSOR GP
7N-6294 AIR COMPRESSOR GP
AIR COMPRESSOR GROUP
4N-2275 AIR COMPRESSOR GROUP
AIR COMPRESSOR GROUP
4N-2275 AIR COMPRESSOR GROUP
AIR COMPRESSOR GROUP
4N-2275 AIR COMPRESSOR GROUP
TURBOCHARGER GP
4N-4555 TURBOCHARGER GP
TURBOCHARGER GP
4N-7157 TURBOCHARGER GP
TURBOCHARGER GP
4N-7156 TURBOCHARGER GP
AIR COMPRESSOR GP
7N-4014 AIR COMPRESSOR GP
AIR COMPRESSOR LINES GROUP
4N-2285 AIR COMPRESSOR LINES GROUP
AIR COMPRESSOR LINES GROUP
4N-2285 AIR COMPRESSOR LINES GROUP
LINES GP-AIR COMPRESSOR
9L-6971 LINES GP-AIR COMPRESSOR
LINES GP-AIR COMPRESSOR
9L-6971 LINES GP-AIR COMPRESSOR
AIR COMPRESSOR LINES GROUP
4N-9610 AIR COMPRESSOR LINES GROUP
AIR COMPRESSOR LINES GROUP
4N-9610 AIR COMPRESSOR LINES GROUP
AFTERCOOLER GP-WATER
4N-9010 AFTERCOOLER GP-WATER

Truck sale:

Caterpillar 621B
 
Caterpillar 621B
- Road Scraper
MACALLISTER MACHINERY CO., INC
Caterpillar 621B
 
Caterpillar 621B
- Road Scraper
MACALLISTER MACHINERY CO., INC
Caterpillar 621B
 
Caterpillar 621B
- Road Scraper
FINNING CANADA
Caterpillar 621B, Road Scraper, Construction
46,500 
Caterpillar 621B, Road Scraper, Construction
- Road Scraper
QUINN COMPANY
Caterpillar 621B, Road Scraper, Construction
46,500 
Caterpillar 621B, Road Scraper, Construction
- Road Scraper
QUINN COMPANY
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