Isuzu KB P190. 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 –

––

–  54 

7 

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

 

Figure 6B1 –

––

–  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 –

––

–  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 –

––

–  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