Isuzu KB P190. Manual - part 538

6D3-4  STARTING AND CHARGING SYSTEM 

 

 

Disassembled View 

Legend

1 Bolt
2 Magnetic Switch
3 Gear Case
4 Piston
5 Piston Shaft
6 Center Bracket

7 Armature
8 Yoke Assembly
9 Brush and Brush Holder

10 Washer
11 Rear Cover
12 Through Bolt

 

 
 

STARTING AND CHARGING SYSTEM  6D3-5 

 

 

 

Inspection and Repair 

Repair or replace necessary parts if extreme wear or damage 
is found during inspection. 

Armature 

Check for continuity between commutator and segment. 
Replace commutator if there is no continuity (i.e., 
disconnected). 
 

 

 

 

 

Check for continuity between commutator and shaft. 
Also, check for continuity between commutator and armature 
core, armature core and shaft. Replace commutator if there is 
continuity (i.e., internally grounded). 
 

 

 

 

 

Brush 

Measure the length of brush. 
Replace with a new one, if it is below the limit. 

Brush Holder 

Check for continuity between brush holder (+) (4) and base (-). 
Replace, if there is continuity (i.e., insulation is broken). 
 

 

 

 

 

Magnetic Switch 

Check for continuity of shunt coil between terminals S and M. 
Replace, if there is no continuity (i.e., coil is disconnected). 
 

 

 

 

 

Continuity of Series Coil 

Check for continuity between terminals S and M. 
Replace, if there is no continuity (i.e., coil is disconnected). 
 

6D3-6  STARTING AND CHARGING SYSTEM 

 

 

 

 

Continuity of Contacts 

With the plunger faced downward, push down the magnetic 
switch. In this state, check for continuity between terminals B 
and M. Replace, if there is no continuity (i.e., contacts are 
faulty). 
 

 

 

 

 

Pinion 

Check if the pinion rotates smoothly in drive direction by hand, 
or if it is locked when it is rotated in reverse. If not, replace the 
pinion. 
 

 

 

 

 

Characteristic Test 

For easily confirming the characteristics, conduct the noload 
test as follows: 
Rating as short as 30 seconds requires rapid testing. 
Fix the starter on the test bench, and wire as shown in 
illustration. When the switch is closed, the current flows and 
the starter runs under no load. At this time, measure current, 
voltage and speed to check if they satisfy the standard. 

Legend 

1 Volt Meter 
2 Revolution Indicator 
3 Battery 
4 Ammeter 
5 Switch 
 

STARTING AND CHARGING SYSTEM  6D3-7 

 

 

Charging System 

General Description 

The charging system is an IC integral regulator charging 
system and its main components are connected as shown in 
illustration. 
The regulator is a solid state type and it is mounted along with 
the brush holder assembly inside the generator installed on the 
rear end cover. 
The generator does not require particular maintenance such as 
voltage adjustment. The rectifier connected to the stator coil 
has eight diodes to transform AC voltage into DC voltage. 
This DC voltage is connected to the output terminal of 
generator. 
 

Legend

1 Startor assembly
2 Housing
3 Slipring
4 Screws (2)
5 Regulator
6.Bolt (4)

7 Rectifier assembly
8 Retaining assembly
9 B+ terminal nut and washer

10 Pulley
11 Rotor assembly
12 Ball bearing

2

11

12

2

8

5

4

3

1

11

7

6

10

9