Isuzu KB P190. Manual — part 399

6D-8 ENGINE ELECTRICAL (4JK1/4JJ1)

Specifications

Battery power

Volts

12

Generator output

Amperes

90

Rotational direction (Viewed from pulley)

 Clockwise

Rated speed

5,000

Maximum speed

rpm

18,000

ENGINE ELECTRICAL (4JK1/4JJ1) 6D-9

Unit Servicing (4JJ1)

RTW56DLF000101

Legend

1. Pulley

Nut

2. Pulley

3. Front Cover Assembly

4. Rotor

Assembly

5. Stator

6. Through

Bolts

7. Nuts

8. Terminal Insulation Plate

9. Rear Cover Assembly

10. Rectifier

11. Brush Holder

12. Regulator Assembly

6D-10 ENGINE ELECTRICAL (4JK1/4JJ1)

Disassembly

1. Remove the through bolts.

2. Insert a flat-blade screwdriver between the front

cover and the stator. Pry the parts apart.

3. Separate the front cover/rotor assembly from the

rear cover/stator assembly.

RTW56DSH000301

4. Place the front cover and rotor in a vise.

5. Remove the pulley nut and the pulley.

6. Remove the rotor from the front cover.

RTW56DSH000501

7. Remove the screw from the front cover.

8. Remove the bearing retainer and the bearing.

RTW56DSH000601

9. Remove the B-terminal nut.

10. Remove the rectifier and the brush holder.

11.Remove the rear cover from the stator.

RTW56DSH000401

12.Remove the bolts securing the stator terminal to

the rectifier.

ENGINE ELECTRICAL (4JK1/4JJ1) 6D-11

13.Remove the stator.

066RS030

14.Remove the bolts securing the regulator, the

rectifier, and the brush holder. Separate the parts.

066RW025

Inspection and Repair

Repair or replace any parts found to be excessively
worn or damaged during the inspection procedure.

Rotor Assembly

1. Check for dirty or rough slip ring surfaces. Remove

dirt from the surfaces with a clean rag. Use No.

500 or No. 600 sandpaper to smooth the surfaces.

2. Measure the slip ring diameters. Replace the slip

ring if the diameter is less than the specified limit.

Slip ring diameter

mm (in)

Standard 27

(1.063)

Limit 26

(1.024)

066RS032

3. Measure the electrical resistance between the slip

rings. If the resistance is greater than the specified

limit (open circuit), repair is required.

Slip ring resistance

Ω

Less than 3.75

066RS033