Onan MJA Series Service Manual page 104

102
REVOLVING FIELD GENERATOR
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FIG 4.M - TESTING FIELD RECTIFIER
4.4 DISASSEMBLY, GENERATOR
1. Disconnect the battery so the plant won't accidentally start.
2. Remove the exciter cover and open the exciter.. This reveals the
thru-rotor -stud nut.
3. Remove the 4 machine screws on the endbell near the ballbearing
and lift out the brush holders, (Fig. 4.H).
4. Disconnect leads E1 and E2 from the static exciter input terminals.
5. Remove the lead from the tapped adjustable resistor in the genera­
tor air outlet opening.
6. Remove the leads from control box to the ignition system, choke,
start disconnect switch, etc. on the engine.
7. Lock the rotor with a screwdriver through the blower opening and
loosen the tbru-rotor-stud nut.
8. Remove the hex nuts from the rim of the end bell.
9. Pull the end bell and Magneciter off the generator. Use a crowbar
to pry
it
loose if necessary.
10.
Slide the stator assembly off its studs. Don't let it rest on the rotor.
Slots are provided in the adapter casting for a prying tool.