Pinion Clutch - Komatsu 4D98 Series Shop Manual

9.
Startin47 Motor
(b) Series coil continuity test
Check continuity between the S and M
terminals. Good if continuity exists.
IIEzzJ
(Coil disconnection)
Replace the magnetic switch.
(c) Contact continuity test
Depress the magnetic switch with the
plunger at the bottom. Check continuity
between the B and M terminals with a
multimeter. Good if continuity exists.
(Contact continuity defect)
Replace the magnetic switch.
(6) Pinion clutch
(a) Pinion inspection
Manually rotate the pinion. Inspect if it is
rotated smoothly in the driving direction,
and is locked in the opposite direction.
Replace the pinion clutch if abnormal.
Multimeter
Fig. 22
Fig. 23
Fig. 24
9-12