Starter/Generator - Toro Workman GTX Service Manual

Starter/Generator

Resistance Testing
Resistance testing of starter/generator field and arma-
ture windings are as follows:
NOTE: Prior to taking small resistance readings with a
digital multimeter, short the meter test leads together.
The meter will display a small resistance value (usually
0.5 ohms or less). This resistance is due to the internal
resistance of the meter and test leads. Subtract this val-
ue from the measured value of the component you are
testing.
1. Park vehicle on a level surface, stop engine, engage
parking brake and remove key from the key switch.
Place vehicle shift lever in the NEUTRAL position.
2. To prevent unexpected operation of electrical sys-
tem components, disconnect cables from battery. Dis-
connect negative (black) cable first and then disconnect
positive (red) cable (see Battery Service in this section).
Position cable away from battery terminals.
3. Raise cargo bed and secure with prop rod to gain ac-
cess to the starter/generator.
4. Remove rear frame panel cover from rear frame to
allow access to starter generator (see Rear Frame Pan-
el Cover in the General Information section of this chap-
ter).
NOTE: Place all fasteners back onto starter/generator
terminals after disconnecting wires to prevent loss of
fasteners.
5. Label all wires on the starter/generator for assembly
purposes. Disconnect all wire connections on starter/
generator to separate starter/generator circuits.
6. Measure resistance (Ohms) between starter/gener-
ator terminals F1 and F2. The meter reading should be
very low (approximately 0.006 Ohms) but not zero.
7. Measure resistance (Ohms) between starter/gener-
ator terminals DF and F1. The meter reading should be
approximately 3 to 6 Ohms.
8. Measure resistance (Ohms) between each starter/
generator terminal and ground. The meter reading
should be infinite (no continuity).
Workman GTX Gasoline
9. Starter/generator removal, disassembly and repair
will be needed if any of the above resistance readings
are incorrect (see Starter/Generator and Starter/Gener-
ator Service in the Service and Repairs section of this
chapter).
10.After resistance testing of starter/generator is com-
pleted, connect all wire connections to starter/generator
terminals. Use torque values shown in Figure 29 to
torque the lower nut before installing the wire connector.
Then, place wire connector on post, install final nut and
torque final nut to values shown in Figure 29.
11. Using labels placed during starter/generator re-
moval, correctly connect all wires to the starter/genera-
tor.
12.Connect battery cables to battery (see Battery Ser-
vice in the Service and Repairs section of this chapter).
Connect positive cable first and then connect negative
cable.
13.Install rear frame panel cover to vehicle. Lower and
secure the cargo bed.
15 to 19 in−lb
(1.7 to 2.2 N−m)
DF
F2
40 to 49 in−lb
(4.5 to 5.6 N−m)
Page 5 − 23
F1
40 to 49 in−lb
(4.5 to 5.6 N−m)
Figure 29
Electrical System