Onan MJA Series Service Manual page 72

70
STARTING SYSTEM
3, 6.4.5 Over-Running Clutch. - Clean the clutch thoroughly but don't
mp in solvent.
It
can't be repacked with grease.
It should slide easily on the armature shaft with no binding. Turn the
pinion: it should rotate smoothly, but not necessarily freely. Reverse
the direction a few times and
it
should instantly lock and unlock. Re­
place the clutch if operation is defective or pinion is worn or damaged.
3.6.4.6 Shifting Solenoid. - Check to be sure plunger moves freely in
coiL Measure the pull-in coil current draw by connecting a battery,
voltmeter and ammeter to the control terminal and the terminal to the
motor. Measure the hold in coil draw from the control terminal to
ground. Inspect the switch for corrosion and clean the contacts
if
nec­
essary. Replace the solenoid if the current draw isn't within limits
IJ.
when cleaned.
3.6.5 ASSEMBLY, STARTING MOTOR
Before assembling, soak the bronze bearings in oil. They are absorb­
ent bearings, designed to hold up to 25% of their own weight in oiL Be
sure the felt oil pad is in the outer end of the commutator end bearing.
When the motor is assembled, check the armature end play.
It
should
be between.
~OS''
and. 030". Adjust end play by adding or remOVing
washers on the commutator end of the armature.
Before installing, check the pinion clearance. Proper clearance is im­
portant to insure starter engagement. Press on solenoid core to shift
, . i
~,----~--------------~~----------
STARTING MOTOR NEED
NOT BE R.EMOVED FROM,.
ENGINE TO MAt<E THIS
MEASUREMENT
,I
PUSH
P;LUNGER
~!}
;
I
' \ 1
At"':
FIG 3 . 6. D - MEASURING FIG 3. 6.E -INSTALLING STARTER
PINION CLEARANCE
AND FLANGE