10.32
ELECTRICAL
2. Measure resistance between insulated brush and starter
housing. Reading should be infinite (OL). Inspect
insulation on brush wires for damage and repair or replace
as necessary.
3. Slide positive brush springs to the side, pull brushes out of
their guides and remove brush plate. Slide brush end frame
off end of starter.
NOTE: The electrical input post must stay with the
field coil housing.
4. Measure resistance between ground brush and brush plate.
Resistance should be .3 ohms or less.
Brush Inspection
1. Measure length of each carbon brush. Replace brush
assembly when worn to 5/16” (8 mm) or less. The brushes
must slide freely in their holders.
Brush Replacement
1. Remove terminal nut with lock washer, flat washer, large
phenolic washer, the small phenolic spacers, and sealing
O-ring. Inspect O-ring and replace if damaged.
2. Slide positive brush springs to the side, pull brushes out of
their guides and remove brush plate.
Armature Testing
1. Remove armature from starter casing. Note order of shims
on drive end for reassembly.
2. Inspect surface of commutator. Replace if excessively
worn or damaged.
3. Using a digital multitester, measure the resistance between
each of the commutator segments. The reading should be
.3 ohms or less.
Limit 5/16” (8 mm)
Brush Length
CAUTION
Some cleaning solvents may damage the
insulation in the starter. Care should be
exercised when selecting an appropriate
solvent. If the commutator needs cleaning use
only electrical contact cleaner.
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