Cushman TURF-TRUCKSTER, Service & Repair Manual

Page: 210 / 263

GENERAL
The charging system consists of a 40 amp alternator
with a built-in regulator/rectifier.
With a built-in regulator/rectifier, it is necessary to dis-
assemble the alternator to electrically test the stator,
rotor and rectifier. Refer to the engine manufacturer’s
service manual for detailed test and repair instructions.
Before attempting to disassemble the alternator, per-
form the following tests to confirm the alternator is at
fault.
OUTPUT CURRENT TEST
(See Figure 10F-1)
1. Remove the RED wire from terminal B of the
alternator.
2. Connect a 60 amp ammeter and multimeter as
shown.
3. Set multimeter to 20 VDC range.
4. Reconnect battery NEG (–) cable.
5. Start the engine.
•
As engine RPM increases, voltage should in-
crease to 14 to 14.5 volts. Current output should
increase to a maximum of 40 amp.
NOTE
Charge condition of battery will affect current
(amp) output.
•
As the battery begins to charge, the current out-
put will slowly decrease.
•
If NO voltage and/or current is measured, pro-
ceed with Step 6.
•
If voltage and current does not start coming down
after a short running period, battery is faulty.
ELECTRICAL SYSTEM
SECTION 10F. CHARGING SYSTEM —
4-CYLINDER 970 GASOLINE ENGINE
10F-1
10F
Figure 10F-1. Output Current Test
!
WARNING
Before installing test instruments, disconnect the
NEG (–) battery cable from the battery.