Kohler 40COZ/33CFOZ Service Manual page 105

WARNING
Hazardous voltage.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
are in place.
Installing the photo transistor circuit board. Hazardous
voltage can cause severe injury or death. Ensure that the
foil side of the photo transistor circuit board, the end of the
shaft, and the threaded holes are clean and free of metal
particles and chips. Metal debris may short-circuit the photo
transistor circuit board and cause hazardous voltage in the
generator set. Do not reconnect the generator set to the load
until the AC voltmeter shows the correct output.
10. While the rotor is suspended, install the photo
transistor board, insulator board, and actuator cup.
Place the photo transistor board lead through the
actuator cup as shown in Figure 8-14. Push the
lead through the hole in the rotor shaft and then
through the exciter laminations ending near the
SCR assembly.
11. Attach the photo transistor board and magnetic
actuator to the end of the rotor shaft with two
mounting screws. See Figure 8-15. Cut off the
excess lead wire, leaving enough wire to reach the
SCR assembly. Strip 50--75 mm (2--3 in.) of the
gray insulator jacket from the lead. Cut off all
exposed uninsulated wire. Strip about 1/4 in.
(0.6 mm) of insulation on the red and black leads
and crimp on #8 electrical terminals (part no.
X-283-7). Before connecting to the SCR studs,
secure the leads with tie wraps. Reconnect the
photo board white lead to the SCR AC stud, red
lead to the F+ stud, green lead to the G stud, and
black lead to the remaining AC stud. Secure the
leads with stop nuts. Torque the connections to 0.9
Nm (8 in. lbs.) maximum.
TP-5737 5/01
Moving rotor.
1. Magnetic actuator
2. Photo transistor board
Figure 8-14 Installing Photo Transistor Board
Figure 8-15 Mounting Photo Transistor Board and
Magnetic Actuator
Section 8 Disassembly/Reassembly
1
2
R12758-29
R12758-29
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3-089
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