Isuzu N-Series. Service manual — part 478
Engine Mechanical (4HK1-TC) 6A-17
• Operate a hoist slowly and hoist the engine
until it comes up to the surface of the chassis
frame.
• Turn the engine at an angle of 90 degrees to
move from the surface of the chassis frame and
remove the engine assembly.
Installation
Notice:
Be absolutely sure that each harness is reconnected to
its original position.
1. Install the engine assembly.
• Hang wire on the engine hanger and hoist to lift
up the engine.
• Operate a hoist slowly to move the engine to
the place where it is to be installed.
• Turn the engine at an angle of 90 degrees to
lower the engine slowly to the place it is to be
installed.
• Make the transmission side lower and operate
a hoist slowly, pulling it backward to the engine.
2. Install the engine mount.
• Install the engine mount to fit into the holes of
the engine mounting cross member and tighten
it up with the specified torque.
Tighten:
Cross member to 48 N
⋅m (4.9 kg⋅m/35 lb⋅ft)
3. Install the feed and return sides of the fuel hose.
4. Install the front exhaust pipe.
N6A6016E
N6A6017E
N6A6017E
N6A6016E
6A-18 Engine Mechanical (4HK1-TC)
5. Install the lower hose of the radiator.
6. Install the power steering oil hose.
7. Install the power steering reserve tank.
8. Install the hydraulic booster brake hose on the
high-pressure side.
9. Install the hydraulic booster brake tank.
10. Install the blow-by separator hose.
11. Install a bracket by the blow-by separator and
install the harness connector and HBB oil hose
bracket.
12. Install a vacuum hose to the vacuum pump.
13. Install the AC generator harness.
• Install the terminal B cable and the harness
connector to the generator.
14. Install the A/C compressor.
• Install the connector.
Legend
1. Fixing Bolt
2. Connector
3. Bracket
4. A/C Compressor
• Install the drive belt.
• Hang the drive belt to adjust its tension with an
adjusting bolt of the tension pulley.
• For further details for adjusting tension of the
belt, refer to “Drive Belt” in Section 6B.
• Check if a flexure is within the specified range
when the center part is pressed by the hand
with 98 N (22 lb) by using a scale, for instance.
In addition, check if it is not damaged as well.
• Flexure of the A/C compressor belt.
• 16 – 20 mm (0.62 – 0.79 in) (when the belt is
new)
• 18 – 22 mm (0.71 – 0.87 in) (when the belt is
reused)
N6A6018E
N6A6019E
N6A6014E
Engine Mechanical (4HK1-TC) 6A-19
• After adjusting tension of the belt, tighten up the
lock nut of the tension pulley.
15. Install the cab back cover.
Legend
1. Screw
2. Cab Back Cover
3. Nut
16. Install the engine harness.
17. Install the heater hoses.
• Install 2 hoses.
18. Install the fan assembly.
19. Install a bracket for the fan guide.
20. Install an upper hose of the radiator.
• Install the VSV vacuum hose and bundle it and
upper hose with a band clip.
21. Install the charge air hose (between intercooler
and inlet duct).
N6A6020E
N6A6015E
N6A6013E
N6A6012E
6A-20 Engine Mechanical (4HK1-TC)
• Install the connector of the boost pressure
sensor.
Legend
1. Charge Air Hose
2. Boost Pressure Sensor
22. Install the inlet hose (between air cleaner and
turbocharger).
• Hose is inserted until bumping to turbocharger.
• Clip assembled along the white line on hose.
Clip Tightening torque: 6.3 N
⋅m (56 lb ft)
Legend
1. Turbocharger
2. Clip
3. White Line
4. Hose
23. Install the charge air hose (between turbocharger
and intercooler).
24. Install the transmission assembly.
Refer to “Transmission Assembly”.
25. Install the starter motor.
• Install 2 up and down bolts to fasten the starter.
• Connect the front frame harness connector and
install each clip which fixes the harness.
26. Replenish the coolant.
27. Install a minus (–) terminal of the battery.
N6A6011E
1
2
3
4
N6A6657E
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