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(2) Permanent magnets
Check permanent magnets for crack, damage and looseness, replace yoke assembly as necessary.
(3) Brushes
① Check brushes for wear. Replace brushes if below
the limit.
② Check brush spring pressure to make sure brush
moves smoothly in brush holder.
③ To check brush holder assembly for grounds, touch
one probe of a circuit tester to holder plate and the
other probe to each of insulated holders. Replace
brush holder assembly if any continuity is noted.
108X
(4) Over running clutch and pinion gear.
While holding clutch housing, rotate pinion.
Pinion should rotate smoothly in one direction (not necessarily easily), but should not rotate in opposite direction.
If the clutch does not function properly, replace it. If pinion gear is worn or burred, replace it.
NOTE: Overrunning clutch should not be cleaned with grease dissolving solvents, since these would dissolve the
lubricant in the clutch mechanism.
(5) Front bracket
Replace front bracket as an assembly including ball bearing if the bearing fails to rotate smoothly or it is noisy.
(6) Rear bracket
Replace rear bracket as an assembly including sleeve bearing if the hearing is badly worn.
(7) Internal gear and planetary gears
Replace the gears if their teeth are badly.
(8) Switch
Check continuity between M terminal and body (ground).
Replace the switch if no continuity is noted.
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