7N3407 CRANKSHAFT ASSEMBLY*R PART OF 7N3410 CRANKSHAFT GROUP SHOWN ON PAGE 32 3408 GEN SET ENGINE



BASIC ENGINE
CRANKSHAFT GP
BALANCER GP
GEAR GP
FLYWHEEL GP
PISTON & ROD GP
CAMSHAFT GP

GEN SET ENGINE 3408 GEN SET ENGINE 78Z
 3408 GENERATOR SET ENGINE 78Z00001-01143 SEBP1379 3408 78Z   (1982)

BASIC ENGINE

CRANKSHAFT GP
CRANKSHAFT AS
7N-3407 CRANKSHAFT AS
CRANKSHAFT GP
7N-3410 CRANKSHAFT GP
 

#SEBP13790030
 

7N-3407: CRANKSHAFT AS

7N3407 CRANKSHAFT ASSEMBLY*R
PART OF 7N3410 CRANKSHAFT GROUP SHOWN ON PAGE 32
c226141 SEBP1379
7N3407 CRANKSHAFT AS Parts scheme
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Parts for your 3408 GEN SET ENGINE:

Pos. Part No Qty Parts name Comments
1. 4N-0684 [1] PIN-DOWEL  
2. 7N-7591 C [1] GEAR-CRANKSHAFT (80 TEETH)  
3. 9F-2247 [5] PLUG  
4. 7S-5005 [1] DOWEL  
  C   CHANGE FROM PREVIOUS TYPE
 

#SEBP13790031
 

7N-3410: CRANKSHAFT GP

7N3410 CRANKSHAFT GROUP
7N3407 CRANKSHAFT PARTS ARE SHOWN ON PAGE 32
c234686 SEBP1379
7N3410 CRANKSHAFT GP Parts scheme
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Parts for your 3408 GEN SET ENGINE:

Pos. Part No Qty Parts name Comments
1. 7N-3407 YR [1] CRANKSHAFT AS  
2. 8N-5421 C [5] BEARING-MAIN  
3. 1W-5252 C [2] PLATE-THRUST  
4. 7N-1999 C [2] SEAL GP-CRANKSHAFT  
  C   CHANGE FROM PREVIOUS TYPE
  R   REMFG PART MAY BE AVAILABLE
  Y   SEPARATE ILLUSTRATION
 

#SEBP13790032
 

4N-1092: BALANCER GP

4N1092 REAR BALANCER GROUP
c236395 SEBP1379
4N1092 BALANCER GP Parts scheme
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Parts for your 3408 GEN SET ENGINE:

Pos. Part No Qty Parts name Comments
1. 0L-1351 [4] BOLT  
2. 1W-4449 C [1] SHAFT-BALANCE WT  
3. 4N-1018 [1] GEAR AS-WEIGHT  
    (43 TEETH)
4. 4N-1015 [1] BEARING-SLEEVE  
5. 1B-7182 C [1] BOLT  
6. 9M-1974 [1] WASHER  
7. 4N-6576 [1] PLATE-THRUST  
  C   CHANGE FROM PREVIOUS TYPE
 

#SEBP13790033
 

7N-2840: GEAR GP-FRONT TIMING

7N2840 FRONT GEAR GROUP
c234691 SEBP1379
7N2840 GEAR GP-FRONT TIMING Parts scheme
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Parts for your 3408 GEN SET ENGINE:

Pos. Part No Qty Parts name Comments
1. 2B-2695 [4] BOLT  
2. 4N-0798 [1] PLATE  
3. 7N-7586 C [1] GEAR ASSEM. (Idler 43 & 80 teeth)  
    (Includes)
  1B-8705 [1] KEY  
4. 7N-2483 [1] BEARING  
5. 0L-1351 [5] BOLT  
6. 7N-2484 [1] SHAFT (accessory drive idler)  
7. 7N-7592 C [1] GEAR (oil pump drive 69 teeth)  
  1B-8705 [1] KEY  
8. 0S-1571 [1] BOLT  
9. 1P-7346 [1] WASHER  
10. 7N-2443 [1] WASHER (thrust)  
  C   INDICATES CHANGE
 

#SEBP13790034
 

4N-3825: GEAR GP-REAR

4N3825 REAR GEAR GROUP
a00233 SEBP1379
4N3825 GEAR GP-REAR Parts scheme
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Parts for your 3408 GEN SET ENGINE:

Pos. Part No Qty Parts name Comments
1. 4N-0860 [1] GEAR (86 teeth)  
2. 1B-9575 [4] BOLT  
  9M-1974 [4] WASHER  
 

#SEBP13790035
 

2W-9054: PISTON & ROD GP

2W9054 CONNECTING ROD AND PISTON GROUP
SERIAL NO. 78Z1051-UP. 2W9053-PAGE 36
c496696 SEBP1379
2W9054 PISTON & ROD GP Parts scheme
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Parts for your 3408 GEN SET ENGINE:

Pos. Part No Qty Parts name Comments
1. 8N-1608 [1] PIN-PISTON  
2. 8N-7295 [2] RETAINER-PIN  
3. 8N-1728 R [1] ROD AS-CONNECTING  
  8N-2018 [1] BEARING-SLEEVE  
4. 6N-8942 [2] BOLT-CONNECTING ROD  
  8L-3441 [2] NUT  
5. 9Y-9497 C [1] BEARING-CONNECTING ROD (STANDARD)  
  4W-5702 CA [1] BEARING-CONNECTING ROD  
    .025IN(.63MM)UNDERSIZE
  4W-5703 CA [1] BEARING-CONNECTING ROD  
    .050IN(1.27MM)UNDERSIZE
6. 2W-9053 Y [1] PISTON GP  
  A   NOT PART OF THIS GROUP
  C   CHANGE FROM PREVIOUS TYPE
  R   REMFG PART MAY BE AVAILABLE
  Y   SEPARATE ILLUSTRATION
 

#SEBP13790036
 

7N-3518: PISTON & ROD GP

7N3518 ROD AND PISTON GROUP-8 REQUIRED
SERIAL NO. 78Z1 TO 78Z1050 INCLUSIVE
c312771 SEBP1379
7N3518 PISTON & ROD GP Parts scheme
  For full view, you need register

Parts for your 3408 GEN SET ENGINE:

Pos. Part No Qty Parts name Comments
1. 8N-1608 C [1] PIN-PISTON  
2. 8N-7295 C [2] RETAINER-PIN  
3. 8N-1728 CR [1] ROD AS-CONNECTING  
  8N-2018 [1] BEARING-SLEEVE  
4. 6N-8942 [2] BOLT-CONNECTING ROD  
  8L-3441 [2] NUT  
5. 1W-7524 C [1] BEARING  
  8N-5427 CA [1] BEARING-CONNECTING ROD  
    .64MM(.025 IN)UNDERSIZE
  8N-5428 CA [1] BEARING-CONNECTING ROD  
    1.27MM(.050 IN)UNDERSIZE
6. 8N-1496 C [1] PISTON GP  
7. 7N-7078 J [1] RING-OIL  
8. 2P-2817 J [1] RING-INTERMEDIATE  
9. 8N-0502 J [1] RING-PISTON (TOP)  
  8N-0822 A [1] RING GP-PISTON  
    (CONSISTS OF COMPLETE
    SET OF RINGS FOR ONE
    PISTON)
    (INCL PARTS MARKED J)
  A   NOT PART OF THIS GROUP
  C   CHANGE FROM PREVIOUS TYPE
  R   REMFG PART MAY BE AVAILABLE
 

#SEBP13790037
 

2W-9053: PISTON GP

2W9053 PISTON GROUP
PART OF 2W9054 CONNECTING ROD & PISTON
c307861 SEBP1379
2W9053 PISTON GP Parts scheme
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Parts for your 3408 GEN SET ENGINE:

Pos. Part No Qty Parts name Comments
1. 2W-0865 R [1] BODY AS-PISTON  
2. 1W-9460 [1] RING (TOP)  
3. 2P-2817 [1] RING-INTERMEDIATE  
4. 7N-7078 [1] RING-OIL  
  1W-8922 FA [1] RING GP-PISTON (STANDARD)  
    (CONSISTS OF A
    COMPLETE SET OF RINGS
    FOR ONE PISTON)
  A   NOT PART OF THIS GROUP
  F   NOT SHOWN
  R   REMFG PART MAY BE AVAILABLE
 

#SEBP13790038
 

4N-0963: CAMSHAFT GP-SINGLE

4N963 CAMSHAFT GROUP
SERIAL NO. 78Z1144-UP
c312637 SEBP1379
4N0963 CAMSHAFT GP-SINGLE Parts scheme
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Parts for your 3408 GEN SET ENGINE:

Pos. Part No Qty Parts name Comments
1. 2W-7980 CR [1] CAMSHAFT AS  
2. 2W-5288 [1] GEAR-CAMSHAFT (86 TEETH)  
3. 1B-8705 [1] KEY-WOODRUFF  
4. 4N-0955 [1] PIN-DOWEL  
5. 0S-0509 [2] BOLT  
6. 4N-0342 [1] PLATE-CAMSHAFT THRUST  
  C   CHANGE FROM PREVIOUS TYPE
  R   REMFG PART MAY BE AVAILABLE
 

#SEBP13790039
 

4N-0963: CAMSHAFT GP-SINGLE

4N963 CAMSHAFT GROUP
SERIAL NO. 78Z1 TO 78Z1143 INCLUSIVE
c518512 SEBP1379
4N0963 CAMSHAFT GP-SINGLE Parts scheme
  For full view, you need register

Parts for your 3408 GEN SET ENGINE:

Pos. Part No Qty Parts name Comments
1. 1W-5058 C [1] CAMSHAFT AS  
2. 7N-8345 [1] GEAR-CAMSHAFT  
    (86 TEETH)
3. 1B-8705 [1] KEY-WOODRUFF  
4. 4N-0955 [1] PIN-DOWEL  
5. 0S-0509 [2] BOLT  
6. 4N-0342 [1] PLATE-CAMSHAFT THRUST  
  C   CHANGE FROM PREVIOUS TYPE
 

Information:

Tool Operating Manual
420-7630 Main Bearing Cap Lifting Device{0599, 0629, 0632, 0701, 1201, 1203, 1230}
420-7630 Main Bearing Cap Lifting Device{0599, 0629, 0632, 0701, 1201, 1203, 1230}
Service Magazine
Use the 171-7212 Wear Sleeve to Repair the Crankshaft Hub {1160}
2011/09/20
40 Power Microscope is Available for Inspecting Bearing Journals on Crankshafts {0777, 1202}
2006/01/16

Caterpillar Parts SIS Catalog 3408 :

COVER GP-CYLINDER BLOCK
4N-1960 COVER GP-CYLINDER BLOCK
COVER GP-CYLINDER BLOCK
4N-6866 COVER GP-CYLINDER BLOCK
CYLINDER BLOCK GP
7N-0853 CYLINDER BLOCK GP
CYLINDER BLOCK AS
7N-0851 CYLINDER BLOCK AS
CYLINDER BLOCK GP
7N-9681 CYLINDER BLOCK GP
1W-9408 ENGINE AR
1W-9408 ENGINE AR
1W-9407 ENGINE AR
CRANKSHAFT GP
7N-3410 CRANKSHAFT GP
BALANCER GP
4N-1092 BALANCER GP
GEAR GP-FRONT TIMING
7N-2840 GEAR GP-FRONT TIMING
GEAR GP-REAR
4N-3825 GEAR GP-REAR
PISTON & ROD GP
2W-9054 PISTON & ROD GP
PISTON & ROD GP
7N-3518 PISTON & ROD GP
PISTON GP
2W-9053 PISTON GP
CAMSHAFT GP-SINGLE
4N-0963 CAMSHAFT GP-SINGLE

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