Onan MJA Series Service Manual page 117

115
REVOLVING
1.
With the generator end cover and band removed to allow access to
the rig, connect a voltmeter acrOSS the dc terminals.
2. Then start the unit and apply full rated load.
3. Loosen the brush rig mounting screws and rotate the rig to get
the
highest voltage .
4. Rotate the rig in one direction until the voltmeter reading starts
to decrease. Mark this point.
5.
Repeat step 4 in the other direction.
6. Half the distance between the two marked points is the neutral
position.
NOTE:
If
a voltmeter isn't available, use the above procedure but
mark the point where arCing begins.
AR MATURE GENE.RATUR
BRUSH
RIG
FIG 5.1- BRUSH RIG ALIGNMENT
5.4 DISASSEMBLY, GENERATOR
1.
Remove the battery cables, and leads to the engine.