Starter/Generator & Voltage Regulator - Toro Workman 1100 Service Manual

Starter/Generator & Voltage Regulator
1. Place machine in the NEUTRAL position (see Oper-
ator's Manual). Set parking brake.
2. Raise bed and secure with prop rod. Gain access to
electric components by removing the electrical cover.
3. Make sure all wires in the charging circuit are con-
nected correctly and tightly. Note the correct location of
starter/generator cable and voltage regulator wire at the
start/run solenoid (Fig. 10).
4. Make sure the battery is fully charged. Operate the
vehicle for several minutes so the voltage regulator is
warmed up. Stop engine and turn key to OFF.
5. Test charging circuit:
A. Set multimeter to VDC. Connect red (+) probe of
the multimeter to the positive (+) battery post. Con-
nect black (–) probe of the multimeter to the negative
(–) post of the battery.
B. Start and run the engine at mid–range RPM.
C. Battery voltage should rise to approximately 14.5
VDC identifying a correctly operating charging cir-
cuit. If the battery has a low charge, this may take a
few minutes.
D. Stop engine and turn key to OFF.
6. If battery voltage did not rise to 14.5 VDC, test start-
er/generator:
A. Disconnect green wire connector from voltage
regulator (Fig. 10). Connect disconnected green
wire lead from starter/generator to ground with a
jumper lead.
B. Set multimeter to VDC. Connect red (+) probe of
the multimeter to the positive (+) battery post. Con-
nect black (–) probe of the multimeter to the negative
(–) post of the battery.
IMPORTANT: Run engine only long enough to get
battery voltage reading and not for more than 15
seconds.
C. Start and run engine at mid–range RPM.
D. Battery voltage should rise steadily to approxi-
mately 18 VDC identifying a correctly operating start-
er/generator. An incorrect reading indicates the need
for starter/generator repair.
E. Stop engine and turn key to OFF.
Electrical System
7. Reconnect green wire connector from the regulator
and test voltage regulator:
A. Set multimeter to VDC. Connect red (+) probe of
the multimeter into the green wire connection. Con-
nect black (–) probe of the multimeter to a known
good ground.
B. Start and run the engine at mid–range RPM.
C. The measured voltage should be approximately
2 VDC when battery is charging and 6–8 VDC when
battery is fully charged. This voltage may rise to
12–14 VDC when the accelerator pedal is released
and the engine is coasting to a stop.
D. If measured voltage is incorrect, stop engine and
replace voltage regulator. Retest charging circuit
(Step 5 above).
8. Stop engine and remove multimeter leads.
6
3
1. Start/run solenoid
2. Main contact post
3. Voltage regulator
1. Terminal A1
2. Terminal A2
Page 6 – 10
4
5
Figure 10
4. Cable to starter/gen.
5. Wire to voltage regulator
6. Green wire connector
4
3
2
1
Figure 11
3. Terminal F1 location
4. Terminal DF location
Workman 1100/1110/2100/2110
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1