Isuzu N-Series. Service manual — part 362
6A3-100 ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T)
Installation
1. Crankshaft Front Slinger
Press in the slinger using the oil seal setting tool
kit.
Oil Seal Setting Tool Kit: 5-8840-2431-0
Front slinger and oil seal setting tools
1) Insert the slinger (2) into the end of adapter (5)
and install the adapter on the crankshaft.
2) Cover the sleeve (4) and tighten the bolt until
the sleeve comes to contact the adapter stop-
per (8).
Part Name
Stamp
Slinger
Oil Seal
Adapter
FT
❍
❍
Sleeve
FT
❍
❍
Oil seal adapter ring
FT
❍
Center bolt
—
❍
❍
Adapter bolt
—
❍
❍
N6A0600E
N6A0601E
Legend
1. Crankshaft
2. Slinger
3. Adapter bolt
4. Sleeve
5. Adapter
6. Washer (5 mm (0.20 in))
7. Center bolt
N6A0602E
N6A0603E
ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T) 6A3-101
3) With the slinger pressed in, make sure of mea-
surements specified in the illustration as well as
of slinger deflection.
(A): 40.5
± 0.3 mm (1.594 ± 0.012 in)
(B): 34.0
± 0.1 mm (1.339 ± 0.004 in)
Notice:
Be sure to replace the slinger and oil seal as a set.
Use about 5 mm (0.20 in) thickness plain washer on the
center bolt.
2. Crankshaft Front Oil Seal
1) Apply engine oil to the lip of the oil seal.
2) Press in the oil seal using the front oil seal set-
ting tool kit.
• Remove the slinger sleeve and insert the oil
seal (4) into the adapter (3).
• Install the oil seal sleeve (1) to the adapter (3)
and tighten the center bolt until the sleeve
comes to contact the adapter stopper (2).
• With the oil seal pressed in, make sure of the
measurements specified in the illustration.
(A): 31
± 0.3 mm (1.220 ± 0.012 in)
Notice:
Be sure to replace the slinger and oil seal as a set.
Use about 5 mm (0.20 in) thickness plain washer on the
center bolt.
3. Crankshaft Damper Pulley
1) Apply a coat of engine oil to the threads of the
bolts.
2) Align the damper pulley with the crankshaft
knock pin and tighten the bolts to the specified
torque in numerical order.
Tighten:
Damper pulley bolt to 200 N
⋅m (20.4 kg⋅m/147 lb⋅ft)
N6A0604E
N6A0605E
N6A0606E
6A3-102 ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T)
4. Fan Belt
Check the drive belt tension.
Depress the drive belt mid-portion with a 98 N
(10 kg/22 lb) force.
Check the drive belt for cranking and other dam-
age.
Fan Belt Adjustment
Fan belt tension is adjusted by moving the generator.
Tighten:
Belt to
• (1): 40 N
⋅m (4.1 kg⋅m/30 lb⋅ft)
• (2): 24 N
⋅m (2.4 kg⋅m/17 lb⋅ft)
• (3): 46 N
⋅m (4.7 kg⋅m/34 lb⋅ft)
5. Fan Assembly
Tighten:
Fan bolt to 24 N
⋅m (2.4 kg⋅m/17 lb⋅ft)
6. Radiator (with Guide)
Tighten:
Radiator bolt to 55 N
⋅m (5.6 kg⋅m/41 lb⋅ft)
Drive Belt Deflection
mm (in)
8 — 12 (0.31 — 0.47) ... New belt
10 — 14 (0.39 — 0.55) ... Reuse belt
N6A0607E
N6A0037E
N6A0038E
N6A0597E
ENGINE (4HF1 / 4HF1-2 / 4HE1-TC / 4HG1 / 4HG1-T) 6A3-103
7. Radiator Lower Hose
8. Coolant reserve Tank Hose/Bypass Hose
9. Radiator Upper Hose
10. Starter
Tighten:
Starter bolt to 76 N
⋅m (7.7 kg⋅m/56 lb⋅ft)
11. Transmission Panel
• Connect battery ground cable.
• Pour engine coolant into engine.
Legend
1. Stud bolt
2. Rubber
3. Washer
4. Flange nut
5. Flame side bracket
6. Radiator side bracket
N6A0611E
N6A0582E
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