Isuzu N-Series. Manual — part 364
6A3-108 ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T)
CRANKSHAFT
Component
N6A1640E
ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T) 6A3-109
Removal
Preparation
• Disconnect battery ground cable.
• Tilt the cab
• Drain coolant and engine oil
1. Engine Assembly
Above works refer to “ENGINE ASSEMBLY” sec-
tion in this manual.
2. Nozzle Cover
3. Cylinder Head Cover
4. Cylinder Head Cover Gasket
5. Rocker Arm Shaft Assembly
Above works refer to “ROCKER ARM SHAFT AS-
SEMBLY” section in this manual.
6. Valve Cap
7. Camshaft Bearing Cap
8. Camshaft Bearing Upper
9. Camshaft Assembly
10. Camshaft Bearing Lower
Above works refer to “CAMSHAFT ASSEMBLY”
section in this manual.
11. Cylinder Head Assembly
Above works refer to “CYLINDER HEAD” section
in this manual.
12. Cylinder Head Gasket
Caution:
Do not reuse the cylinder head gasket.
13. Clutch Pressure Plate Assembly
14. Driven Plate
Legend
1. Engine cover
29. Crankshaft front slinger
2. Nozzle cover
30. Flywheel
3. Cylinder head cover
31. Crankshaft rear oil seal
4. Cylinder head cover gasket
32. Crankshaft rear slinger
5. Rocker arm shaft assembly
33. Spacer rubber
6. Valve cap
34. Oil pan
7. Camshaft bearing cap
35. Oil pump strainer
8. Camshaft bearing upper
36. Water pump pulley
9. Camshaft assembly
37. Water pump
10. Camshaft bearing lower
38. Front retainer
11. Cylinder head assembly
39. Oil thermo valve
12. Cylinder head gasket
40. Power steering pump idle gear cover
13. Clutch pressure plate assembly
41. Power steering pump idle gear
14. Driven plate
42. Flywheel housing
15. Engine control wire
43. Idle gear A
16. Engine control lever assembly
44. Oil pump assembly
17. Oil pipe
45. Connecting rod cap assembly
18. Oil filter assembly
46. Connecting rod lower bearing
19. Vacuum pump oil pipe
47. Piston and connecting rod assembly
20. Vacuum pump rubber hose
48. Crankcase
21. Fan belt
49. Thrust bearing lower
22. Generator
50. Crankshaft bearing lower
23. Engine foot
51. Crankshaft assembly
24. Injection pump assembly
52. Thrust bearing upper
25. Fan belt adjust plate
53. Crankshaft bearing upper
26. Generator bracket
54. Crankshaft gear
27. Crankshaft pulley
55. Crankshaft
28. Crankshaft front oil seal
N6A0422E
6A3-110 ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T)
Above works refer to “FLYWHEEL AND PILOT
BEARING” section in this manual.
15. Engine Control Wire
16. Engine Control Lever Assembly
17. Oil Pipe
18. Oil Filter Assembly
19. Vacuum Pump Oil Pipe
20. Vacuum Pump Rubber Hose
21. Fan Belt
22. Generator
23. Engine Foot
24. Injection Pump Assembly
1) Remove the injection pump bracket bolts and
the injection pump rear bracket bolts.
2) Then remove the injection pump assembly.
25. Fan Belt Adjust Plate
Legend
1. Vacuum pump oil pipe
2. Vacuum pump rubber hose
N6A0425E
N6A0630E
N6A0631E
N6A0426E
ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T) 6A3-111
26. Generator Bracket
27. Crankshaft Damper Pulley
1) Use the crankshaft stopper to prevent the
crankshaft from turning.
Crankshaft Stopper: 5-8840-2230-0
2) Loosen the damper pulley bolts and remove
the damper pulley.
28. Crankshaft Front Oil Seal
29. Crankshaft Front Slinger
Above works refer to ““CRANKSHAFT FRONT OIL
SEAL” section in this manual.
30. Flywheel
1) Use the crankshaft stopper to prevent the
crankshaft from turning
Crankshaft Stopper: 5-8840-2230-0
2) Loosen the flywheel bolts in numerical order a
little at a time as shown in the illustration.
3) Remove the flywheel stopper and the flywheel
assembly.
N6A0292E
N6A0293E
N6A0427E
N6A0427E
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