ment. Press on solenoid core to shift the pinion into full
(b) Inspect all connections to be sure that
they are properly clinched and soldered. Inspect the
mesh. Measure the clearance between pinion and pinion
insulation for evidences of damage.
stop (fig. 7-87). Clearance should be 0.07 to 0.12-inch. Ad-
just the link screw on the end of the solenoid plunger for
(c) The only way to check for field coil
shorts is to use the starting motor bench test.
brush spring tension with a tension meter. Push the brush
and take a reading just as the brush projects a little from
the brush holder. On a new brush the spring tension
should be 32-40 ounces. If brush spring tension is below 20
ounces, replace. Spring tension can be changed by twisting
the spring at the holder with long nose pliers.
(a) Ensure that plunger moves freely in coil.
Measure the pull-in coil current draw by using Test A.
Current should not exceed 16 amps.
(b) Measure the hold-in draw using Test B.
Current should not exceed 6 amps.
(c) Total hold and pull current draw using
Test C is 22 amps. Total current draw should not exceed 25
(d) Replace a solenoid that does not meet
these test specifications.
Test After Reassembly.
(1) After the motor is assembled, check the
armature end play by inserting thickness gage between
thrust washer (21, fig. 7-62) and pinion housing (22). End
play should be between 0.005-inch and 0.030-inch. Adjust
end play by adding or removing thrust washers (21,
(2) Before installing, check the pinion clearance.
Figure 7-88. Checking Pinion Clearance.
Proper clearance is important to ensure starter engage-