Perkins 103-06 Workshop Manual page 49

103-09/10 Tests:
Relation between charge
current and battery
terminal voltage
(at alternator 5000rpm)
Alternator Performance of unit alone
No load voltage (between
blue and blue) tester reading
at operation (about
5000rpm)
Tester Between
continuity blue and
blue of
lead wire
Insulation resistance (
between a lead wire and coil
plate)
B. Inspection of Flywheel
Turn the flywheel by hand. If 12-time resistance due
to magnetic force is experienced in one turn, and
turns relatively smoothly, there is no trouble in the
flywheel.
If noise is heard during rotation, the bearing is
defective. Replace the bearing.
If the flywheel turns without any resistance, the
magnetic force is too weak.
The magnet should be replaced with new.
- Disassembly
When the alternator is defective or the flywheel turns
abnormally, disassemble the alternator as explained
below.
A. Remove the dust cap (6) using a screw driver.
B. Hold the pulley side jaw of the flywheel complete (1)
with a vice, loosen the nut (7).
C. Pull out the spring washer (8) and washer (9).
D. Pull out the flywheel complete (1). If it is hard to
remove, tap the M10 threads with a plastic
hammer.
Normal
1. More than 15A at 14V
2. 15A-0.5A at 14-15V
Normal
More than AC 30V
Continuity observed
More than 3Mtt
Abnormal
More than 15A at battery
voltage more than 15V
Charge current OA
Flowing charge current
but low battery voltage
Abnormal
Less than AC30V AC OV
Continuity not observed
Less than 3Mohm
1. Flywheel complete
2. Plate complete 3.
Coil plate 4. Stator
complete 5. Bearing 6.
Dust cap 7. Nut
Cause
Improper operation of
regulator
Defective alternator or
regulator or improper
connection
Defective battery
(overdischarge)
Cause
Demagnetized flywheel,
disconnected coil or
wiring harness
Disconnected coil
Improper coil insulation
14
8. Spring washer
9. Washer
10. Coupler
11. Clamp 12.
Screw 13.
Screw 14.
Collar