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5N7895 OIL PUMP GROUP--One Section Gear Serial No. 67B2382-Up 5N7894 Oil Pump parts are shown on Page 52C D398A




LUBRICATION SYSTEM

PUMP GP-ENGINE OIL
 

#UEG0646S0210
 

5N-7895: PUMP GP-ENGINE OIL GEAR

5N7895 OIL PUMP GROUP--One Section Gear
Serial No. 67B2382-Up
5N7894 Oil Pump parts are shown on Page 52C
c182783 UEG0646S
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Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5N-7894 Y [1] PUMP ASSEM.  
    (Separate Illustration)
2. 0S-1588 [2] BOLT  
  5L-5840 [2] WASHER 1.19 mm(.0469 in.)thick  
3. 5M-2894 [6] WASHER 2.79 mm(.109 in.)thick  
4. 4L-3437 [2] GASKET  
5. 0S-1618 [2] BOLT  
6. 7L-7735 [1] GASKET  
7. 0S-1594 [6] BOLT  
8. 3N-0910 [1] ADAPTER ASSEM.  
    (Includes)
  2D-6642 [3] BALL  
9. 5L-2649 [1] BEARING  
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. 3N-7730 [1] PLATE  
16. 5N-4411 [1] BOLT  
  Y   SEPARATE ILLUSTRATION
 

#UEG0646S0211
 

5N-7894: PUMP GP-ENGINE OIL GEAR

5N7894 PUMP GP-ENGINE OIL GEAR
One Section Gear S/N 67B2382-Up
Part Of 5N7895 Pump-Engine Oil Gear
c496596 UEG0646S
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Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 1W-1880 [1] SHAFT AS-PUMP DRIVE  
2. 1N-9349 [1] SEAL-LIP TYPE  
3. 0L-1143 [4] BOLT  
4. 5M-2894 [16] WASHER  
5. 0T-0573 [1] BOLT  
6. 5N-3811 [1] PLATE  
7. 5N-3812 [1] GASKET  
8. 8N-1342 [1] COVER  
  5M-4987 [2] DOWEL (LARGE)  
  1Y-2681 [2] DOWEL (SMALL)  
9. 9S-4185 [1] PLUG-O-RING  
  3K-0360 [1] SEAL-O-RING  
10. 4B-7220 [3] BOLT  
11. 5P-8244 [9] WASHER 2.5MM(.098IN)THK  
  5L-6267 [9] WASHER 1.27MM(.05IN)THK  
12. 5N-7882 [1] MANIFOLD AS  
13. 4L-6766 [4] DOWEL-HOLLOW  
14. 5N-8175 [1] PLUG-O-RING  
  2S-4078 [1] SEAL-O-RING  
15. 3P-0658 [2] SEAL-O-RING  
16. 5N-4408 C [1] MANIFOLD AS  
17. 5L-2648 [1] BEARING  
18. 9S-1343 [1] PLUG-CUP  
19. 4L-3770 [1] RETAINER AS-BEARING  
20. 6F-0984 [1] DOWEL  
21. 5L-2649 [1] BEARING-DRIVE GEAR  
22. 0S-1588 [5] BOLT  
23. 5N-3806 [1] HOUSING AS  
24. 5L-2652 [1] BEARING  
25. 4F-7226 [6] BOLT  
26. 5N-3810 [1] GASKET  
27. 0L-2070 [2] BOLT  
28. 9S-4190 [1] PLUG  
  2M-9780 [1] SEAL-O-RING  
29. 9S-4182 [1] PLUG  
  3J-7354 [1] SEAL-O-RING  
30. 0S-1590 [5] BOLT  
31. 1W-1877 [2] GEAR AS-IDLER (EA INCLS)  
32. 5L-2651 [2] BEARING  
33. 6L-8858 [2] SHAFT-PUMP IDLER  
34. 1A-2029 [4] BOLT  
35. 9S-1343 [1] PLUG-CUP  
36. 2S-2781 [1] PLUNGER-RELIEF  
  6N-1280 [1] SPRING  
37. 8J-8559 [1] PLUG  
  7M-8485 [1] SEAL  
38. 9S-4191 [2] PLUG-O-RING  
  3J-1907 [2] SEAL-O-RING  
39. 6V-3510 [1] ADAPTER-THREAD  
40. 4K-1388 [3] SEAL-O-RING  
41. 2S-2251 [1] SEAL-O-RING  
42. 4F-8965 [1] BOLT  
43. 9S-4188 [2] PLUG-O-RING  
44. 4M-8974 [1] LOCK (2 HOLE)  
  5L-4949 [1] LOCK (5 HOLE)  
  C   CHANGE FROM PREVIOUS TYPE
 

#UEG0646S0212
 

3N-5552: PUMP AS-OIL

3N5552 OIL PUMP ASSEMBLY
Serial No. 67B1593 to 67B2028 inclusive
Part of 3N2695 Oil Pump Group shown on Page 52B
c223628 UEG0646S
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Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 6L-8811 [1] MANIFOLD ASSEM.  
    (Includes)
2. 4L-6766 [4] DOWEL  
3. 9S-4188 [3] PLUG  
  4K-1388 [3] SEAL  
4. 4F-7226 C [5] BOLT  
5. 6L-8806 [1] MANIFOLD ASSEM.  
    (Includes)
6. 5L-2648 [1] BEARING  
7. 3D-4603 [3] PLUG  
8. 9S-1343 [2] PLUG  
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. 3P-0658 [2] SEAL  
14. 4B-7220 C [3] BOLT  
15. 5L-6267 [9] WASHER 1.27 mm(.050 in.)thick  
  8H-3526 [9] WASHER 3.04 mm(.0096 in.)thick  
16. 6L-8858 [2] SHAFT  
17. 4L-6796 [2] GEAR ASSEM. (12 teeth)  
    (Each Includes)
18. 5L-2651 [2] BEARING  
19. 8F-4197 C [1] BOLT  
20. 3N-0911 [1] COVER ASSEM.  
    (Includes)
  4B-9783 [1] BALL  
21. 5L-2652 [1] BEARING  
22. 7L-2599 [1] SHAFT ASSEM.  
    (Includes)
23. 4L-6764 [1] KEY  
  C   INDICATES CHANGE
 

#UEG0646S0213
 

5N-3799: PUMP AS-OIL

5N3799 OIL PUMP ASSEMBLY
Serial No. 67B2029 to 67B2117 inclusive
Part of 5N3798 Oil Pump Group shown on Page 52B-1
c215614 UEG0646S
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Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5N-3800 [1] SHAFT ASSEM.  
2. 1N-9349 [1] SEAL  
3. 0L-1143 [4] BOLT  
4. 5M-2894 [16] WASHER  
5. 0T-0573 [1] BOLT  
6. 5N-3811 [1] PLATE  
7. 5N-3812 [1] GASKET  
8. 5N-3808 [1] COVER ASSEM.  
    (Includes)
  5M-4987 [2] DOWEL (large)  
  7S-5005 [2] DOWEL (small)  
9. 9S-4185 [1] PLUG  
  8L-2786 [1] SEAL  
10. 4B-7220 [3] BOLT  
11. 8H-3526 [9] WASHER 3.04 mm(.0096 in.) thick  
  5L-6267 [9] WASHER 1.27 mm(.050 in.) thick  
12. 6L-8811 [1] MANIFOLD ASSEM.  
    (Includes)
13. 4L-6766 [4] DOWEL  
14. 9S-4188 [3] PLUG  
  4K-1388 [3] SEAL  
15. 3P-0658 [2] SEAL  
16. 6L-8806 [1] MANIFOLD ASSEM.  
    (Includes)
17. 4L-6719 [1] BEARING  
18. 9S-1343 [2] PLUG  
19. 4L-3770 [1] RETAINER ASSEM.  
    (Includes)
20. 6F-0984 [1] DOWEL  
21. 5L-2649 [1] BEARING  
  0S-1588 [5] BOLT  
22. 4M-8974 [1] LOCK (2 hole)  
  5L-4949 [1] LOCK (5 hole)  
23. 5N-3806 [1] HOUSING  
    (Includes)
24. 5L-2652 [1] BEARING  
25. 4F-7226 [6] BOLT  
26. 5N-3810 [1] GASKET  
27. 0L-2070 [1] BOLT  
28. 9S-4190 [1] PLUG  
  7L-2224 [1] SEAL  
29. 9S-4182 [1] PLUG  
  033-5853 [1] SEAL  
30. 0S-1590 [6] BOLT  
31. 4L-6796 [2] GEAR ASSEM.  
    (Each Includes)
32. 4L-5804 [2] BEARING  
33. 6L-8858 [2] SHAFT  
34. 1A-2029 [4] BOLT  
 

#UEG0646S0214
 

8N-2743: PUMP GP-ENGINE OIL

8N2743 OIL PUMP ASSEMBLY
Serial No. 67B2118 to 67B2328 inclusive
Part of 5N3798 Oil Pump Group shown on Page 52B-2
c221813 UEG0646S
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Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5N-3800 [1] SHAFT ASSEM.  
    (Includes)
  4L-6764 [1] KEY  
2. 1N-9349 [1] SEAL  
3. 0L-1143 [4] BOLT  
4. 5M-2894 [16] WASHER  
5. 0T-0573 [1] BOLT  
6. 5N-3811 [1] PLATE  
7. 5N-3812 [1] GASKET  
8. 8N-1342 [1] COVER  
  5M-4987 [2] DOWEL (large)  
  1Y-2681 [2] DOWEL (small)  
9. 9S-4185 [1] PLUG  
  8L-2786 [1] SEAL  
10. 4B-7220 [3] BOLT  
11. 8H-3526 [9] WASHER 3.04 mm(.0096 in.) thick  
  5L-6267 [9] WASHER 1.27 mm(.050 in.) thick  
12. 6L-8811 [1] MANIFOLD ASSEM.  
    (Includes)
13. 4L-6766 [4] DOWEL  
14. 9S-4188 [3] PLUG  
  4K-1388 [3] SEAL  
15. 3P-0658 [2] SEAL  
16. 6L-8806 [1] MANIFOLD ASSEM.  
    (Includes)
17. 4L-6719 [1] BEARING  
18. 9S-1343 [2] PLUG  
19. 4L-3770 [1] RETAINER ASSEM.  
    (Includes)
20. 6F-0984 [1] DOWEL  
21. 5L-2649 [1] BEARING  
22. 0S-1588 [5] BOLT  
  4M-8974 [1] LOCK (2 hole)  
  5L-4949 [1] LOCK (5 hole)  
23. 5N-3806 [1] HOUSING  
    (Includes)
24. 5L-2652 [1] BEARING  
25. 4F-7226 [6] BOLT  
26. 5N-3810 [1] GASKET  
27. 0L-2070 [2] BOLT  
28. 9S-4190 [1] PLUG  
  7L-2224 [1] SEAL  
29. 9S-4182 [1] PLUG  
  033-5853 [1] SEAL  
30. 0S-1590 [5] BOLT  
31. 4L-6796 [2] GEAR ASSEM.  
    (Each Includes)
32. 4L-5804 [2] BEARING  
33. 6L-8858 [2] SHAFT  
34. 1A-2029 [4] BOLT  
35. 9S-1343 [1] PLUG  
 

#UEG0646S0215
 

1W-1882: PUMP GP-ENGINE OIL

1W1882 OIL PUMP GROUP--One Section Gear
Serial No. 67B2329 to 67B2381 inclusive
Part of 5N3798 Oil Pump Group shown on Page 52B-3
c233239 UEG0646S
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Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 1W-1880 [1] SHAFT ASSEM.  
2. 1N-9349 [1] SEAL  
3. 0L-1143 [4] BOLT  
4. 5M-2894 [16] WASHER  
5. 0T-0573 [1] BOLT  
6. 5N-3811 [1] PLATE  
7. 5N-3812 [1] GASKET  
8. 8N-1342 [1] COVER  
  5M-4987 [2] DOWEL (large)  
  1Y-2681 [2] DOWEL (small)  
9. 9S-4185 [1] PLUG  
  8L-2786 [1] SEAL  
10. 4B-7220 [3] BOLT  
11. 8H-3526 [9] WASHER 3.04 mm(.0096 in.) thick  
  5L-6267 [9] WASHER 1.27 mm(.050 in.) thick  
12. 6L-8811 [1] MANIFOLD ASSEM.  
    (Includes)
13. 4L-6766 [4] DOWEL  
14. 9S-4188 [3] PLUG  
  4K-1388 [3] SEAL  
15. 3P-0658 [2] SEAL  
16. 6L-8806 [1] MANIFOLD ASSEM.  
    (Includes)
17. 5L-2648 [1] BEARING  
18. 9S-1343 [2] PLUG  
19. 4L-3770 [1] RETAINER ASSEM.  
    (Includes)
20. 6F-0984 [1] DOWEL  
21. 5L-2649 [1] BEARING  
22. 0S-1588 [5] BOLT  
  4M-8974 [1] LOCK (2 hole)  
  5L-4949 [1] LOCK (5 hole)  
23. 5N-3806 [1] HOUSING  
    (Includes)
24. 5L-2652 [1] BEARING  
25. 4F-7226 [2] BOLT  
26. 5N-3810 [1] GASKET  
27. 0L-2070 [2] BOLT  
28. 9S-4190 [1] PLUG  
  7L-2224 [1] SEAL  
29. 9S-4182 [1] PLUG  
  033-5853 [1] SEAL  
30. 0S-1590 [5] BOLT  
31. 1W-1877 [2] GEAR ASSEM.  
    (Each Includes)
32. 5L-2651 [2] BEARING  
33. 6L-8858 [2] SHAFT  
34. 1A-2029 [4] BOLT  
35. 9S-1343 [1] PLUG  
 

#UEG0646S0216
 

8L-6247: BASE GP-OIL PAN

OIL PAN BASE (8L6247 N/S)
Serial No. 67B1391 to 67B1592 inclusive
c115396 UEG0646S
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Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. [1] GASKET  
2. C [11] BOLT  
3. [1] BASE ASSEM.  
4. [2] BOSS  
5. [2] PLUNGER ASSEM.  
6. [1] COVER  
7. [2] GASKET  
8. [12] BOLT  
9. [8] LOCKWASHER  
10. [1] SCREEN ASSEM.  
11. [1] BELL  
12. [1] PLUG  
13. [1] TUBE ASSEM.  
14. [1] GASKET  
15. [2] LOCK  
16. [2] BOLT  
17. [1] LOCK  
18. [2] NUT  
19. [1] LOCK  
20. [1] "U" BOLT  
21. [1] BRACKET  
22. [6] BOLT  
23. [1] LOCK  
24. [2] LOCK  
25. [1] PLATE  
26. [2] GASKET  
27. [2] BOLT  
28. [1] CAP ASSEM.  
29. [1] TUBE ASSEM.  
30. C [1] BOLT  
  C   INDICATES CHANGE
 

#UEG0646S0217
 

8L-6247: BASE GP-OIL PAN

8L6247 OIL PAN BASE GROUP
Serial No. 67B1593 to 67B2020 inclusive
c150567 UEG0646S
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Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 8L-5457 [1] GASKET  
2. 0S-1627 C [13] BOLT  
3. 3N-6362 C [1] BASE ASSEM.  
4. 8L-8418 [1] TUBE ASSEM.  
5. 8L-6254 [2] PLUNGER ASSEM.  
6. 4H-5440 [1] COVER  
7. 7L-3111 [2] GASKET  
8. 0S-1594 [12] BOLT  
9. 3B-4506 [8] LOCKWASHER  
10. 7L-2334 [1] SCREEN ASSEM.  
11. 5S-3465 [1] BELL  
12. 4B-8586 [1] PLUG  
13. 7L-2341 [1] TUBE ASSEM.  
14. 7L-2905 [1] GASKET  
15. 7L-2906 [2] LOCK  
16. 0T-0703 [2] BOLT  
17. 0L-0796 [1] LOCK  
18. 1B-4203 [2] NUT  
19. 0S-2415 C [2] LOCK  
20. 4B-0383 [1] "U" BOLT  
21. 7L-2338 [1] BRACKET  
22. 0S-1616 [6] BOLT  
23. 8F-8683 [1] LOCK  
24. 8F-8682 [2] LOCK  
25. 5B-2888 [1] PLATE  
26. 7M-4353 [2] GASKET  
27. 2N-9841 [1] BOLT  
28. 7L-4447 [1] CAP ASSEM.  
  C   INDICATES CHANGE
 

#UEG0646S0218
 

8L-6247: BASE GP-OIL PAN

8L6247 OIL PAN BASE GROUP--Part 1
Serial No. 67B2021 to 67B2381 inclusive
c218115 UEG0646S
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Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 3N-6362 [1] BASE ASSEM.  
2. 8L-6254 [1] PLUNGER ASSEM.  
3. 7L-4447 [1] CAR ASSEM.  
4. 8L-8418 [1] TUBE ASSEM.  
5. 7L-3111 [2] GASKET  
6. 8L-5457 [1] GASKET  
7. 5B-2888 [1] PLATE  
8. 0T-0703 [2] BOLT  
9. 0L-0796 [2] LOCK  
10. 4B-0383 [1] "U" BOLT  
  1B-4203 [2] NUT  
  0S-2415 [2] LOCK  
11. 7L-2338 [1] BRACKET  
12. 9F-6580 C [6] BOLT  
13. 8F-8682 [2] LOCK  
  8F-8683 [1] LOCK  
14. 7L-2334 [1] SCREEN ASSEM.  
15. 6N-4488 C [1] BELL  
16. 7M-4353 [2] GASKET  
17. 0S-1627 [13] BOLT  
18. 0S-1594 [8] BOLT  
  3B-4506 [8] LOCKWASHER  
19. 4H-5440 [1] COVER  
20. 2N-9841 [1] BOLT  
  4M-6953 C [1] WASHER  
  C   INDICATES CHANGE
 

#UEG0646S0219
 

8L-6247: BASE GP-OIL PAN

8L6247 OIL PAN BASE GROUP--Part 2
Serial No. 67B2021 to 67B2381 inclusive
c228517 UEG0646S
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Parts for your D398A MARINE ENGINE:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 7L-2341 [1] TUBE ASSEM.  
2. 1A-2029 C [4] BOLT  
3. 7L-2906 [2] LOCK  
4. 7L-2905 [1] GASKET  
5. 6V-1897 C [1] PLUG  
6. 5N-3860 C [1] PLATE  
7. 0L-1351 C [2] BOLT  
8. 5M-2894 C [6] WASHER  
9. 1N-9930 C [1] TEE  
10. 3J-5389 C [3] PLUG  
11. 3N-9753 C [1] PLUG  
12. 5N-3859 C [1] CLAMP  
13. 0S-1571 C [2] BOLT  
  0S-2185 C [2] SPACER  
14. 3N-7792 C [1] TUBE  
15. 0S-1588 C [4] BOLT  
  3B-4506 C [4] LOCKWASHER  
16. 3P-0649 C [1] SEAL  
17. 2N-7479 C [1] HOUSING  
  3P-0656 C [1] SEAL  
18. 2N-8519 C [1] GUIDE  
19. 3P-0648 C [1] SEAL  
20. 3N-4875 C [1] SPRING  
21. 4L-8138 C [1] PISTON  
22. 3P-0650 C [2] SEAL  
23. 3N-7793 C [1] CONNECTOR  
  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 Relief Valve
D379, D398, D399 INDUSTRIAL & MARINE ENGINES
Engine Oil Pressure
D379, D398, D399 INDUSTRIAL & MARINE ENGINES
Sending Units For Oil Pressure
D379, D398, D399 INDUSTRIAL & MARINE ENGINES
Information Release Memo
APPEARANCE CHANGE ON REMAN SHORT BLOCKS
APPEARANCE CHANGE ON REMAN SHORT BLOCKS
Disassembly and Assembly
Oil Pressure Relief Valve
D379, D398, D399 INDUSTRIAL & MARINE ENGINES
Oil Pump
D379, D398, D399 INDUSTRIAL & MARINE ENGINES
Prelubrication Oil Pump (D399)
D379, D398, D399 INDUSTRIAL & MARINE ENGINES
Service Magazine

Caterpillar Parts SIS Catalog D398A :

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