Isuzu KB P190. Manual - part 252

ENGINE ELECTRICAL   6D – 7 

GENERATOR 

    REMOVAL AND INSTALLATION 

Read this Section carefully before performing any removal and installation procedure. This Section gives you 
important points as well as the order of operation. Be sure that you understand everything in this Section before you 
begin. 
 

 

P1010002 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Important Operations-Removal 

Cooling Fan Belt 

1.  Disconnect the battery cables at the battery terminals.
2.  Loosen and remove the fan belt adjusting plate bolts. 
3.  Remove the fan belt from the generator drive pulley. 

 
 

Generator 

1.  Remove the vacuum pump hose. 
2.  Remove the generator bolt and the generator from the 

bracket. 

 
 
 

Important Operations-Installation 

Follow the removal procedure in the reverse order to 
perform the installation procedure. Pay careful attention to 
the important points during the installation procedure. 

 
 
 

Generator 

1.  Install the generator to the bracket. 
2.  Tighten the generator bolt to the specified torque. 
3.  Install the vacuum pump hose. 

 

Generator Bolt Torque 

N

m (kg
m/Ib
ft)

40 (4.1/30) 

 

 

 

6D – 8  ENGINE ELECTRICAL 

 

033RY00009

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cooling Fan Drive Belt 

1.  Hold the generator toward the engine. 
2.  Install the fan belt to the three pulleys. 

1 Crankshaft 

pulley 

2 Generator 

pulley 

3 

Cooling fan drive pulley 

 
 
 

3.  Adjust the fan belt tension 

Fan belt tension is adjusted by moving the generator.
Depress the drive belt mid-portion with a 98N (10 
kg/22 Ib) force. 

Cooling Fan Drive Belt Deflection 

mm (in)

New belt      4 - 7 (0.16 - 0.28) 

Reuse belt    6 - 9 (0.24 - 0.35) 

 

 

4.  Tighten the adjusting plate bolts to the specified 

torque. 

 

Adjusting Plate Bolt 

N·m (kg·m/lb·ft)

19 (1.9/14) 

 

5.  Reconnect the battery cable to the battery. 

 

ENGINE ELECTRICAL   6D – 9 

 

  DISASSEMBLY 

 

 

 

 

RTW46DLF000401 

 

Disassembly Step 

 

 

 

   1.  Vacuum pump 

 

 

 

   2.  O-ring  

 

 

   3.  Through bolt 

 

 

 

   4.  B Terminal nut 

 

 

 

   5.  Rear cover 

 

 

 

   6.  Pulley  

 

 

   7.  Rotor assembly 

 

 

 

   8.  Front cover assembly 

 

 

 

   9.  Rear rotor bearing 

 

 

 

  10.  Rectifier assembly 

 

 

 

  11.  Stator assembly 

 

 

 

  12.  Rotor assembly 

 

 

 

 

6D – 10  ENGINE ELECTRICAL 

 

 

 

   

 

RTW46DSH000101 

Important Operations 

1. Vacuum 

Pump 

1.  Loosen the vacuum pump fixing screws. 
2.  Support the vacuum pump O-ring. 
3.  Carefully remove the O-ring. 

2. Cover 
 
 

 

  

 

RTW46DSH000201 

 

3. Through 

Bolt 

1.  Remove the M5 through bolt. 
2.  Separate the front and rear sides of the vacuum pump.
3.  Insert the tips of 2 ordinary screwdrivers into the space 

between the front cover and the stator core. Remove 
the front cover and rotor together with the rear cover 
and stator. 

If removal is difficult, push the rear cover to the side and 
lightly tap the end of the shaft with a plastic hammer to 
loosen it. 
•  The front cover oil seal must be replaced with a new 

one when the front cover is removed. 

•  Take care not to damage the stator core with the 

screwdriver tips. 

 

   

 

RTW46DSH000601 

 

 

 

  

 

RTW46DSH002101 

 

4. Pulley 

1.  Carefully clamp the rotor assembly in a vise. 
2.  Loosen the pulley nut. 
3.  Remove the pulley and the front cover from the rotor.