2007 ISUZU KB P190 engine

ENGINE ELECTRICAL 6D – 3

GENERAL DESCRIPTION
GENERATOR STARTER MOTOR



066L300004 065L300002

The basic charging system is the IC integral regulator charging system. The internal components are connected
electrically as shown in charging circuit diagram.
The generator features a solid state regulator that is mounted inside the generator. All regulator components are
enclosed into a solid mold, and this unit along with the brush holder assembly is attached to the slip ring end frame.
The generator voltage setting cannot be adjusted.
The starter motor circuit is composed of a 4-pole 4-brush type direct current series motor. The starter motor circuit
utilizes negative ground polarity.

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ISUZU KB P190 2007

6D – 4 ENGINE ELECTRICAL

CHARGING CIRCUIT DIAGRAM





RTW46DSH005101


STARTING CIRCUIT DIAGRAM



RTW46DSH005501




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ISUZU KB P190 2007

ENGINE ELECTRICAL 6D – 5
TORQUE SPECIFICATIONS
GENERATOR N
m (kg
m/Ib
ft)



RTW46DLF000201

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ISUZU KB P190 2007

6D – 6 ENGINE ELECTRICAL
STARTER MOTOR N
m (kg
m/Ib
ft)



RTW46DLF000301


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ISUZU KB P190 2007

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.


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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)




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6D – 8 ENGINE ELECTRICAL

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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.


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ISUZU KB P190 2007

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


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ISUZU KB P190 2007

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.


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ISUZU KB P190 2007