ALTERNATOR DISASSEMBLY
Notes: Disassemble alternator only as far as neces-
sary to replace defective part(s).
For stator removal, refer to BF4822 Stator Service Tool
Instructions.
In this publication, Front Housing refers to the Drive
End Housing, and Rear Housing refers to the opposite
end housing.
FAN REMOVAL
1. Remove fan guard.
2. Use a 3/4” socket wrench to loosen nut attaching
fan to alternator. Keep shaft from rotating by
holding the pulley in a vise, jaws padded with
brass or aluminum (Figure 13-7).
3. Remove nut and hardened washer.
4. Remove fan assembly from alternator.
PULLEY REMOVAL
1. Use a 15/16” socket wrench on the pulley nut.
Clamp the pulley in a vise, jaws padded with
brass or aluminum, and loosed pulley nut (Figure
13-8).
2. Remove pulley nut and hardened washer.
3. With a gear puller remove the pulley from the
shaft.
4. Remove woodruff key from shaft.
5. Remove pulley bushing from shaft.
REGULATOR REMOVAL
1. Disconnect regulator from alternator harness.
2. Remove mounting hardware from regulator
mounting feet (Figure 13-9).
3. Remove regulator.
FIGURE 13-7.
FIGURE 13-8.
FIGURE 13-9.
M13-12 Niehoff Alternator Overhaul Manual M13003 04/01
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