TM9-4310-396-13
b.
Test Engine Starter Motor. - continued
Figure 5-2. Relay-Solenoid Diagram.
(11)
Pinion test.
(a) Inspect pinion teeth and replace pinion assembly if teeth are excessively worn or damaged.
(b) Insure pinion slides smoothly. Replace pinion assembly if faulty.
(c) Replace if clutch slips or seizes with new pinion assembly.
(12)
Electrical brush test.
NOTE
The electrical brushes are quickly worn by the motor. When the electrical brushes are defective, the
output of the motor will drop. New electrical brush dimensions are .55 inches (14mm).
(a) Install new electrical brushes which have been worn beyond specified wear limit of .43 inches 11mm) or if
outside of brush is damaged.
(b) If movement of electrical brushes in electrical brush holder is hampered because electrical holder assembly
is rusted, replace assembly.
(c) Electrical holder assembly ground test: check the continuity between the insulated electrical holder assembly
and the base of electrical holder assembly. Continuity indicates that these two points are grounded and that
electrical holder assembly must be replaced.
c.
Assembly.
(1) Install pinion assembly (25, Figure 5-1) to motor armature (21).
(2) Install pinion stopper set (23) on motor armature (21).
(3) Install pinion stopper (24).
5-8
