Onan MJA Series Service Manual page 105

REVOLVING FIELD GENERATOR 1U~
,0.713
TURN NUT OLiT TO END OF"
GENERATOR THROUGH
STUD. STRI KE WITH SOFT
HAMMER WHILE PRYING.
FIG 4.N - REMOVING ROTOR
:1--.,
11.
Remove the 4 screws holding the air baffle and reInove the baffle.
12. Slide the rotor and blower assembly off the thru-rotor-stud (Fig.4.N)
13. Remove the ballbearing froIn the rotor with a gear puller .
4.5 ASSE1v1BL Y, GENERATOR
1. Press the ballbearing on the rotor shaft as far as it will go.
2. Wipe both the crankshaft stub and the tapered section of the rotor
shaft clean and install the rotor and blower assembly.
3. Install t he air baffle and secure with
screws. Place so the rubber groInInet
is near air outlet.
4. Install the thru-rotor-stud nut but don't
tighten.
5. Check the rotor run-out at the rear
end of the shaft (Fig. 4.0). Run-out
musthe less than ,012". Excessive
run-out Inay be caused by dirt or a
nick on the taper of either the rotor or
..l..J ,L-_ _ _ _ _
crankshaft.
If
not, correct by tapping FIG 4.0 - CHECKING ROTOR
ballbearing. Don't hit the collector RUN-OUT·
rings.
6. Install the stator asseInbly. A iocating pin on the engine-to-gen ­
erator adapter aids pOSitioning. When installing the stator, feed
lead Bl through the rubber grOInInet in the air baffle. Leads E1
and E2 should lead to the rear of the stator through a notch between