Isuzu N-Series. Manual — part 361
6A3-96 ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T)
2. Install the ring gear when it is sufficiently heated.
The ring gear must be installed with the chamfer
facing the clutch.
Pilot Bearing
Check the pilot bearing for wear or damage and replace
with a new one if any abnormal condition is noticeable.
Installation
1. Pilot Bearing
2. Snap Ring
3. Flywheel Assembly
4. Washer
1) Align the flywheel with the crankshaft knock pin
and temporarily tighten the flywheel bolts.
2) Use the crankshaft stopper to prevent the
crankshaft from turning.
Crankshaft stopper: 5-8840-2230-0
3) Install the washer and the flywheel bolts and
tighten to the specified torque in numerical or-
der show in the illustration.
Tighten:
Flywheel bolt to
• 1st step: 78 N
⋅m (8.0 kg⋅m/58 lb⋅ft)
• 2nd step: 90 — 120
°
4) Remove the crankshaft stopper.
5. Driven Plate
Use the clutch pilot aligner to install the driven
plate.
Clutch Pilot Aligner: 5-8840-2240-0
6. Clutch Pressure Plate Assembly
1) Align the clutch pressure plate with the flywheel
knock pin.
N6A0589E
Legend
1. Washer
2. Snap ring
3. Pilot bearing
Legend
1. Clutch pilot aligner
2. Clutch pressure plate assembly
3. Driven plate
N6A0586E
N6A0351E
ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T) 6A3-97
2) Tighten the pressure plate bolts to the specified
torque in numerical order.
Tighten:
Clutch pressure plate bolt to 40 N
⋅m (4.1 kg⋅m/30 lb⋅ft)
7. Transmission Assembly
Above works refer to “ENGINE ASSEMBLY” sec-
tion in this manual.
8. Starter
Tighten:
Starter bolt to 76 N
⋅m (7.7 kg⋅m/56 lb⋅ft)
9. Transmission Panel
• Connect the battery ground cable.
Legend
A. Knock pin
N6A0352E
N6A0582E
6A3-98 ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T)
CRANKSHAFT FRONT OIL SEAL
Component
Removal
Preparation
• Disconnect battery ground cable.
• Tilt the cab.
• Drain coolant
1. Transmission Panel
2. Starter
• Disconnect the battery cable at the starter mo-
tor.
• Remove the starter assembly from flywheel
housing.
Legend
1. Transmission panel (Australia only)
7. Fan assembly
2. Starter
8. Fan belt
3. Radiator upper hose
9. Crankshaft damper pulley
4. Coolant reserve tank hose/Bypass hose
10. Crankshaft front oil seal
5. Radiator lower hose
11. Crankshaft front slinger
6. Radiator (with guide)
N6A0595E
ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T) 6A3-99
3. Radiator Upper Hose
4. Coolant Reserve Tank Hose/Bypass Hose
5. Radiator Lower Hose
6. Radiator (with Guide)
7. Fan Assembly
8. Fan Belt
9. 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.
10. Crankshaft Front Oil Seal
Caution:
Be careful not to damage the crankshaft oil seal contact
surface during the removal procedure.
11. Crankshaft Front Slinger
Use the slinger puller to pull out the slinger.
Slinger Puller: 5-8840-2360-0
N6A0582E
N6A0597E
Legend
1. Oil seal
2. Slinger
3. Felt
N6A0598E
N6A0599E
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