Isuzu KB P190. Service manual — part 796

Engine Cooling – V6 Engine

Page 6B1–49

4

Depress tang on main wiring harness to cooling fan
motor wiring harness connector and separate
connector (1).

Figure 6B1 –

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– 54

7

Remove the attaching bolt (1), from both sides of the
radiator fan and shroud assembly.

Figure 6B1 –

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– 55

Engine Cooling – V6 Engine

Page 6B1–50

When removing, transporting or installing the
fan and shroud assembly, do not grasp the
assembly by the fan rings (1) as this may
bend the fan motor shaft and cause fan
vibrations

Figure 6B3 – 56

When handling the fan assembly, always hold
the assembly at the fan shroud (1).

Figure 6B3 – 57

Install

Installation of the cooling fan and shroud assembly is the reverse of removal procedures, noting the following points:

1

Ensure that fan and shroud assembly to radiator attaching clips are fully engaged.

2

Ensure that the top automatic transmission cooling pipe (if fitted) is installed to the integral shroud clip.

3

Check cooling fan operation. Refer to 6C1-2 Engine Management Diagnostics. Also check for correct rotational
direction of the cooling fan.

Engine Cooling – V6 Engine

Page 6B1–51

Disassemble

1

Remove cooling fan and shroud assembly as previously described.

N O T E

Neither fan is to be separated from its fan motor.
The assembly is carefully balanced during
manufacture and duplicating this balance on
reassembly, is not possible.

2

Remove the motor assembly wiring harness (1) from
the integral clips that form a part of the shroud (2).

3

Remove screws (3) attaching the motor assembly (to
the shroud, then remove each motor, fan and wiring
assembly (4) from the shroud.

Figure 6B1 –

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– 58

Reassemble

Reassembly is the reverse of disassembly procedures, noting the following points:

1

Tighten motor to shroud attaching screws to the correct torque specification. Do not over-tighten.

Fan motor to shroud screw
torque specification . . . . . . . . . . . . 5 N.m

2

Ensure that all wiring is routed correctly and secured by the shroud clips.

3

Install cooling fan and shroud assembly to the radiator, as previously described.

3.14 Flexible Transmission Cooler Hose

Replace

N O T E

The flexible hoses are not serviced separately.
Therefore, should a hose require replacement,
then the hose and radiator to hose cooler pipe
assembly must be fitted.

1

Place a drip tray beneath the engine and radiator section.

Engine Cooling – V6 Engine

Page 6B1–52

2

Disconnect the transmission cooler pipes from the
transmission.

•

Release the verifier disk (2) by pulling back with
the fingers, then slide back down the cooler line
(1).

•

Open the cooler line release tool J-41623-B and
slip over cooler line to be disconnected from the
transmission, above the verifier disk (2), as
shown.

•

Slide the release tool along the line to engage
with the quick-connect fitting.

•

While pushing inwards, rotate the tool about one
sixth of a turn to release the spring clip holding
the line.

•

With the release tool held in this position, pull
back on the cooler line to release.

•

Repeat this process with the remaining line and
quick-connect fitting.

3

Plug both pipe openings and hoses to minimise fluid
loss and prevent foreign matter entry.

Figure 6B1 –

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– 59

4

Disconnect the transmission cooler hose/line
assemblies from the radiator quick connect fittings as
follows:

•

Pull back the verifier disc (1) from the quick
connect fitting (2) and slide it back along the line.

•

Open the release tool, Tool No J-41623-B (3),
slip it over the cooler line to be disconnected
from the radiator, ahead of the verifier disc.

•

Slide the release tool along the cooler line and
engage it with the quick-connect fitting (2).

•

While pushing inwards, rotate the release tool
clockwise, about one sixth of a turn to release
the spring clip holding the cooler line.

•

With the release tool held in this position, pull
back on the cooler line to release it.

•

Plug the openings to prevent fluid loss and/or
contamination.

•

Repeat the procedure to remove the remaining
cooler line.

N O T E

If the spring clip and/or O-ring seal in the quick-
connect fitting is damaged during the removal
process, the complete fitting must be replaced.

5

Unclip the outlet cooler line (4) from the radiator fan
shroud (5).

Figure 6B1 –

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– 60