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3N7726 PUMP GP-OIL S/N 49C447-923 3N7722-Page 55B G399 GAS ENGINE




LUBRICATION SYSTEM

PUMP GP-ENGINE OIL
 

#UEG0605S0250
 

3N-7726: PUMP GP-OIL

3N7726 PUMP GP-OIL
S/N 49C447-923
3N7722-Page 55B
c182787 UEG0605S
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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3N-7722 Y [1] PUMP ASSEM.  
    (Separate Illustration)
2. 1A-2029 C [6] BOLT  
3. 5L-5840 [2] WASHER 1.27mm(.05 in.)thick  
4. 4L-3437 [2] GASKET  
5. 3N-7730 [1] PLATE  
6. 4L-7924 [1] BOLT  
7. 3B-4506 [10] LOCKWASHER  
8. 5L-2243 [1] RETAINER ASSEM.  
    (Includes)
  6F-0984 [3] DOWEL  
9. 5N-6165 C [1] BEARING ASSEM.  
10. 1C-2251 C [4] BOLT  
11. 3N-7731 [1] GASKET  
12. 3P-0653 [2] SEAL  
13. 6L-8809 [1] TUBE  
14. 0S-1591 [3] BOLT  
15. 5M-2894 C [6] WASHER 2.5mm(.98 in.)thick  
16. 0S-1588 C [2] BOLT  
  C   INDICATES CHANGE
  Y   SEPARATE ILLUSTRATION
 

#UEG0605S0251
 

5N-7869: PUMP GP-OIL

5N7869 PUMP GP-OIL-ONE SECTION GEAR
S/N 49C924-Up
5N7868-Page 55A.03
c182789 UEG0605S
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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5N-7868 Y [1] PUMP ASSEM.  
    (Separate Illustration)
2. 0S-1594 [6] BOLT  
3. 5L-5840 [2] WASHER 1.27mm(.05 in.)thick  
4. 4L-3437 [2] GASKET  
5. 3N-7730 [1] PLATE  
6. 5N-4411 [1] BOLT  
7. 0S-1588 [10] BOLT  
8. 5L-2243 [1] RETAINER ASSEM.  
    (Includes)
  6F-0984 [3] DOWEL  
9. 5N-6165 [1] BEARING ASSEM.  
10. 0S-1571 [4] BOLT  
11. 3N-7731 [1] GASKET  
12. 3P-0653 [2] SEAL  
13. 6L-8809 [1] TUBE  
14. 0S-1591 [3] BOLT  
15. 5M-2894 [6] WASHER 2.5mm(.98 in.)thick  
  Y   SEPARATE ILLUSTRATION
 

#UEG0605S0252
 

5N-7868: PUMP GP-ENGINE OIL GEAR

5N7868 PUMP GP-OIL-ONE SECTION GEAR
S/N 49C924-Up
Part Of 5N7869 Pump
c182790 UEG0605S
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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5N-4410 [1] MANIFOLD ASSEM.  
2. 4L-6766 [4] DOWEL  
3. 9S-4188 [2] PLUG  
4. 4K-1388 [3] SEAL  
5. 5N-4408 [1] MANIFOLD ASSEM.  
6. 5L-2648 [1] BEARING  
7. 9S-1343 [2] PLUG  
8. 3P-0658 [2] SEAL  
9. 4L-3770 [1] RETAINER ASSEM.  
10. 5L-2649 [1] BEARING  
11. 6F-0984 [1] DOWEL  
12. 0S-1588 [5] BOLT  
  4M-8974 [1] LOCK (2 hole)  
  5L-4949 [1] LOCK (5 hole)  
13. 8F-4197 [3] BOLT  
14. 5B-5059 [6] BOLT  
15. 5P-8244 [9] WASHER  
16. 3N-7702 [2] SHAFT  
17. 3N-7707 [2] GEAR ASSEM. (12 teeth)  
    (Each Includes)
18. 5L-2651 [2] BEARING  
19. 5M-6214 [1] PLUG  
20. 6L-3526 [1] HOUSING ASSEM.  
21. 5L-2652 [1] BEARING  
22. 9M-2242 [2] BEARING  
23. 3N-7710 [1] SHAFT ASSEM.  
24. 3N-8247 [1] KEY  
25. 8J-8559 [1] PLUG  
  7M-8485 [1] SEAL  
26. 9S-4191 [2] PLUG  
  3J-1907 [2] SEAL  
27. 2S-2781 [1] PLUNGER  
28. 6N-1280 [1] SPRING  
29. 5N-8175 [1] PLUG  
  2S-4078 [1] SEAL  
30. 6V-3510 [1] ADAPTER  
31. 4F-8965 [2] BOLT  
32. 2S-2251 [1] SEAL  
 

#UEG0605S0253
 

3N-7722: PUMP AS-OIL

3N7722 OIL PUMP ASSEMBLY
Serial No. 49C348 to 49C923 inclusive
Part of 3N7726 Oil Pump Group shown on Page 55A
c182788 UEG0605S
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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3N-7605 [1] MANIFOLD  
2. 4L-6766 [4] DOWEL  
3. 9S-4188 C [3] PLUG  
4. 4K-1388 C [3] SEAL  
5. 6L-8806 [1] MANIFOLD ASSEM.  
    (Includes)
6. 5L-2648 [1] BEARING  
7. 9S-1343 [2] PLUG  
8. 3P-0658 [2] SEAL  
9. 4L-3770 [1] RETAINER ASSEM.  
    (Includes)
10. 5L-2649 [1] BEARING  
11. 6F-0984 [1] DOWEL  
12. 0S-1588 [5] BOLT  
  4M-8974 [1] LOCK (2 hole)  
  5L-4949 [1] LOCK (5 hole)  
13. 8F-4197 [3] BOLT  
14. 5B-5059 [6] BOLT  
15. 3B-4507 [9] LOCKWASHER  
16. 3N-7702 [2] SHAFT  
17. 3N-7707 [2] GEAR ASSEM. (12 teeth)  
    (Each Includes)
18. 5L-2651 [2] BEARING  
19. 5M-6214 [1] PLUG  
20. 6L-3526 [1] HOUSING ASSEM.  
    (Includes)
21. 5L-2652 [1] BEARING  
22. 9M-2242 [2] BEARING  
23. 3N-7710 [1] SHAFT ASSEM.  
    (Includes)
24. 3N-8247 [1] KEY  
  C   INDICATES CHANGE
 

#UEG0605S0254
 

3N-1325: OIL COOLER & LINES GP

3N1325 OIL COOLER AND LINES GROUP--Part 1 of 2
Serial No. 49C261 to 49C264 inclusive. Part of 3N1197, 3N3373, 3N3340 and 3N3374 Engine Arrangements
listed on Pages 8 through 11. Only separate parts serviced. Refer also to Page 90 for special parts
c115269 UEG0605S
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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. [2] SEAL  
2. [1] TUBE ASSEM.  
3. [2] BOLT  
4. [1] TUBE ASSEM.  
5. [1] SPACER  
6. [1] BOLT  
7. [17] LOCKWASHER  
8. [1] SUPPORT  
9. [22] BOLT  
10. [3] PLUG  
11. [6] BOLT  
12. [1] TUBE ASSEM.  
13. [8] LOCK  
14. [14] BOLT  
15. [8] GASKET  
16. [7] TUBE ASSEM.  
17. [8] RING  
18. [8] SEAL  
19. [1] SEAL  
20. [1] CORE ASSEM.  
21. [3] GASKET  
22. [1] PLUG  
23. [1] BOLT (2.25" Long)  
  [1] BOLT (1.75" Long)  
24. [2] SPACER  
25. [2] BOLT  
26. [1] BOLT  
27. [2] NUT  
28. [8] LOCKWASHER  
29. [1] BOLT  
30. [1] PLATE  
31. [3] BOLT  
32. [16] TUBE ASSEM.  
33. [16] LOCK  
34. [3] BOLT  
35. [2] FLANGE  
36. [2] GASKET  
 

#UEG0605S0255
 

3N-1325: OIL COOLER & LINES GP

3N1325 OIL COOLER AND LINES GROUP--Part 2 of 2
Serial No. 49C261 to 49C264 inclusive. Part of 3N1197, 3N3373, 3N3340 and 3N3374 Engine Arrangements
listed on Pages 8 through 11. Only separate parts serviced. Refer also to Page 90 for special parts
c115270 UEG0605S
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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3J-5389 [4] PLUG  
2. 3P-0651 [2] SEAL  
3. 3N-1321 [1] ELBOW ASSEM.  
  3N-1372 [1] SEAL  
4. 3N-2416 [1] TUBE ASSEM.  
5. 1D-4586 [4] BOLT  
  3B-4510 [4] LOCKWASHER  
6. 0S-1621 [1] BOLT  
  1D-4719 [1] NUT  
7. 3B-4508 [5] LOCKWASHER  
8. 6F-0295 [1] CLIP  
9. 3N-2422 [1] BRACKET  
10. 2N-3553 [1] SEAL  
11. 3B-0551 [1] PLUG  
12. 0S-1595 [4] BOLT  
13. 4L-8121 [1] GASKET  
14. 5M-6213 [1] PLUG  
15. 4L-6235 [1] ELBOW  
16. 0S-1588 [16] BOLT  
17. 3B-4506 [23] LOCKWASHER  
18. 6L-8990 [1] PIPE  
  3P-0649 [2] SEAL  
19. 6L-8938 [1] PIPE  
20. 3P-0656 [2] SEAL  
21. 3B-1915 [3] BOLT  
22. 2N-1485 [1] TUBE ASSEM.  
23. 3P-0655 [1] SEAL  
24. 4H-9027 [1] PLUG  
25. 4L-8138 [1] PISTON  
26. 6L-6495 [1] SPRING  
27. 3P-0648 [1] SEAL  
  2N-8519 [1] GUIDE  
28. 1A-2029 [4] BOLT  
29. 2N-7479 [1] HOUSING  
30. 3P-0649 [1] SEAL  
31. 4L-8137 [1] TUBE ASSEM.  
32. 3P-0650 [2] SEAL  
33. 1N-9930 [1] TEE  
 

#UEG0605S0256
 

3N-1325: OIL COOLER & LINES GP

3N1325 OIL COOLER AND LINES GROUP--Part 1 of 2
Serial No. 49C265 to 49C325 inclusive. Part of 3N1197, 3N3373, 3N3340 and 3N3374 Engine Arrangements
listed on Pages 8 through 11. Only separate parts serviced. Refer also to Page 90 for special parts
c115269 UEG0605S
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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. [2] SEAL  
2. [1] TUBE ASSEM.  
3. [2] BOLT  
4. [1] TUBE ASSEM.  
5. [1] SPACER  
6. [1] BOLT  
7. [17] LOCKWASHER  
8. [1] SUPPORT  
9. [22] BOLT  
10. [3] PLUG  
11. [6] BOLT  
12. [1] TUBE ASSEM.  
13. [8] LOCK  
14. [14] BOLT  
15. [8] GASKET  
16. [7] TUBE ASSEM.  
17. [8] RING  
18. [8] SEAL  
19. [1] SEAL  
20. [1] CORE ASSEM.  
21. [3] GASKET  
22. [1] PLUG  
23. [1] BOLT (2.25" Long)  
  [1] BOLT (1.75" Long)  
24. [2] SPACER  
25. [2] BOLT  
26. [1] BOLT  
27. [2] NUT  
28. [8] LOCKWASHER  
29. [1] BOLT  
30. [1] PLATE  
31. [3] BOLT  
32. [16] TUBE ASSEM.  
33. [16] LOCK  
34. [3] BOLT  
35. [2] FLANGE  
36. [2] GASKET  
 

#UEG0605S0257
 

3N-1325: OIL COOLER & LINES GP

3N1325 OIL COOLER AND LINES GROUP--Part 2 of 2
Serial No. 49C265 to 49C325 inclusive. Part of 3N1197, 3N3373, 3N3340 and 3N3374 Engine Arrangements listed
on Pages 8 through 11. Only separate parts serviced. Refer also to Page 90 for special parts
c142972 UEG0605S
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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3J-5389 [4] PLUG  
2. 3P-0651 [2] SEAL  
3. 3N-6377 C [1] ELBOW ASSEM.  
4. 3N-2416 [1] TUBE ASSEM.  
5. 1D-4586 [4] BOLT  
  3B-4510 [4] LOCKWASHER  
6. 0S-1621 [1] BOLT  
  1D-4719 [1] NUT  
7. 3B-4508 [5] LOCKWASHER  
8. 6F-0295 [1] CLIP  
9. 3N-2422 [1] BRACKET  
10. 2N-3553 [1] SEAL  
11. 3B-0551 [1] PLUG  
12. 0S-1595 [4] BOLT  
13. 4L-8121 [1] GASKET  
14. 5M-6213 [1] PLUG  
15. 4L-6235 [1] ELBOW  
16. 0S-1588 [16] BOLT  
17. 3B-4506 [23] LOCKWASHER  
18. 6L-8990 [1] PIPE  
  3P-0649 [2] SEAL  
19. 6L-8938 [1] PIPE  
20. 3P-0656 C [1] SEAL  
21. 3B-1915 [3] BOLT  
22. 2N-1485 [1] TUBE ASSEM.  
23. 3P-0655 C [2] SEAL  
24. 4H-9027 [1] PLUG  
25. 4L-8138 [1] PISTON  
26. 3N-4875 C [1] SPRING  
27. 3P-0648 [1] SEAL  
  2N-8519 [1] GUIDE  
28. 1A-2029 [4] BOLT  
29. 2N-7479 [1] HOUSING  
30. 3P-0649 [1] SEAL  
31. 3N-4288 C [1] TUBE  
32. 3P-0650 [2] SEAL  
33. 1N-9930 [1] TEE  
34. 3N-1322 C [1] COUPLING ASSEM.  
  3N-1372 [1] SEAL ASSEM.  
  C   INDICATES CHANGE
 

#UEG0605S0258
 

3N-1325: OIL COOLER & LINES GP

3N1325 OIL COOLER AND LINES GROUP--Part 1 of 2
Serial No. 49C326 to 49C347 inclusive
Part of 3N1197, 3N3373, 3N3340 and 3N3374 Engine Arrangements listed on Pages 8 through 11
Only separate parts serviced. Refer also to Page 90 for special parts
c149726 UEG0605S
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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 4F-7387 [2] SEAL  
2. 4L-8116 [1] TUBE ASSEM.  
3. 1C-2251 [2] BOLT  
4. 2N-3360 [1] TUBE ASSEM.  
5. 8L-4852 [1] SPACER  
6. 0S-1590 [1] BOLT  
7. 3B-4506 [17] LOCKWASHER  
8. 4L-6263 [1] SUPPORT  
9. 0S-1588 C [24] BOLT  
10. 3J-5389 C [1] PLUG  
11. 1A-2029 C [4] BOLT  
12. 6L-9091 [1] TUBE ASSEM.  
13. 6H-4209 [8] LOCK  
14. 2A-4639 [14] BOLT  
15. 6L-6580 [8] GASKET  
16. 2N-3362 [7] TUBE ASSEM.  
17. 9F-6656 [8] RING  
18. 3P-0647 [8] SEAL  
19. 3P-0651 C [1] SEAL  
20. 3N-4469 C [1] CORE ASSEM.  
    (Includes)
21. 8M-9307 [2] PLUG  
  6F-7062 [2] WASHER  
22. 1B-5174 [1] PLUG  
23. 0L-2070 [1] BOLT (2.25 in. long)  
  0S-1571 [1] BOLT (1.75 in. long)  
24. 8L-4855 [2] SPACER  
25. 0L-1143 [2] BOLT  
26. 0S-1587 [1] BOLT  
27. 1D-5117 [2] NUT  
28. 3B-4508 [8] LOCKWASHER  
29. 9S-1366 [1] BOLT  
30. 4L-7882 [1] PLATE  
31. 2B-0947 [3] BOLT  
32. 2N-4541 [16] TUBE ASSEM.  
33. 0T-0329 C [16] LOCK  
34. [3] BOLT  
35. 4L-6273 [2] FLANGE  
36. 4L-8120 [2] GASKET  
37. 4L-8606 [3] GASKET  
  C   INDICATES CHANGE
 

#UEG0605S0259
 

3N-1325: OIL COOLER & LINES GP

3N1325 OIL COOLER AND LINES GROUP--Part 2 of 2
Serial No. 49C326 to 49C347 inclusive
Part of 3N1197, 3N3373, 3N3340 and 3N3374 Engine Arrangements listed on Pages 8 through 11
Only separate parts serviced. Refer also to Page 90 for special parts
c149727 UEG0605S
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Parts for your G399 GAS ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3J-5389 [4] PLUG  
2. 3P-0651 [2] SEAL  
3. 3N-6377 [1] ELBOW ASSEM.  
4. 3N-2416 [1] TUBE ASSEM.  
5. 1D-4586 [4] BOLT  
  3B-4510 [4] LOCKWASHER  
6. 0S-1621 [1] BOLT  
  1D-4719 [1] NUT  
7. 3B-4508 [5] LOCKWASHER  
8. 6F-0295 [1] CLIP  
9. 3N-2422 [1] BRACKET  
10. 2N-3553 [1] SEAL  
11. 3B-0551 [1] PLUG  
12. 0S-1595 [4] BOLT  
13. 4L-8121 [1] GASKET  
14. 5M-6213 [1] PLUG  
15. 4L-6235 [1] ELBOW  
16. 0S-1588 C [18] BOLT  
17. 3B-4506 [23] LOCKWASHER  
18. 6L-8990 [1] PIPE  
  3P-0649 [2] SEAL  
19. 6L-8938 [1] PIPE  
20. 3P-0656 [1] SEAL  
21. 3B-1915 [3] BOLT  
22. 2N-1485 [1] TUBE ASSEM.  
23. 3P-0655 [2] SEAL  
24. 4H-9027 [1] PLUG  
25. 4L-8138 [1] PISTON  
26. 3N-4875 [1] SPRING  
27. 3P-0648 [1] SEAL  
  2N-8519 [1] GUIDE  
28. 1A-2029 C [2] BOLT  
29. 2N-7479 [1] HOUSING  
30. 3P-0649 [1] SEAL  
31. 3N-4288 [1] TUBE  
32. 3P-0650 [2] SEAL  
33. 1N-9930 [1] TEE  
34. 3N-1322 [1] COUPLING ASSEM.  
  3N-1372 [1] SEAL ASSEM.  
  C   INDICATES CHANGE
 

Information:

Engine News
Special Instruction
Installation Of Replacement Parts For 3N7722, 8N2744, 1W1872, 1W1873, 1W1881 and 1W1882 Engine Oil Pump Groups{1304}
Installation Of Replacement Parts For 3N7722, 8N2744, 1W1872, 1W1873, 1W1881 and 1W1882 Engine Oil Pump Groups{1304}
Specifications
Oil Pump
G379, G398 & G399 ENGINES
Oil Pump Relief Valves
G379, G398 & G399 ENGINES
Engine Oil Pressure
G379, G398 & G399 ENGINES
Prelube Pump
G379, G398 & G399 ENGINES
Information Release Memo
APPEARANCE CHANGE ON REMAN SHORT BLOCKS
APPEARANCE CHANGE ON REMAN SHORT BLOCKS
Disassembly and Assembly
Oil Pressure Relief Valve
G379, G398 & G399 ENGINES
Oil Pump (Earlier)
G379, G398 & G399 ENGINES
Oil Pump (Later)
G379, G398 & G399 ENGINES
Service Magazine

Caterpillar Parts SIS Catalog G399 :

Truck sale:

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