b.
Cleaning. Refer to paragraph 6-3.a for general
clean-ing instructions.
CAUTION
Armature, windings, solenoid switch, and pinion drive
shall not be cleaned with dry cleaning solvent.
(1)
Allow parts to air dry.
c.
Inspection. Refer to paragraph 6-3.b for general
in-spection instructions.
(1)
Damaged solenoid.
(2)
Fouled pinion bearing.
(3)
Damaged pinion.
(4)
Test armature and field windings as follows:
(a)
See
figure
6-15.Touch
multimeter
positive lead to each commutator riser
bar and jumper lead to the armature.
(b)
If the multimeter indicates any voltage,
the armature is grounded and shall be
replaced.
(c)
Position armature in growler (Table 2-
1), hold growler’s test blade parallel to
and just above armature.
(d)
Slowly rotate the armature in the
growler. If test blade vibrates and is
attracted
to
the
armature,
the
armature is shorted and shall be
replaced.
(e)
See Figure 6.16. Touch multimeter
positive lead to each field winding lub
and jumper lead to winding housing.
(f)
If the multimeter indicates any voltage,
any winding is shorted, it shall be
replaced.
(g)
Disconnect
batteries
and
perform
continuity test on field windings. If any
winding is open, it shall be replaced.
(h)
See Figure 6-17. Holding one test
lead against the commutator frame
touch the other probe to each brush
holder in turn.
Figure 6-15. Grounded Armature test Setup
6-54
