Service manual

G420F(FE) Service Manual Chapter 4. Engine Electrical System
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4. Open Circuit Test of Field Coil.
Check continuity of the field coil using a circuit
tester. If there is no continuity, replace the field
coil assembly owing to open circuit of the field coil.
5. Ground Test of Field Coil.
With the yoke field coil installed, inspect continuity
between the field coil and the yoke, if there is
continuity, replace the field coil.
6. Brush.
If the brush is worn out to the limit, replace the
brush.
7. Brush Holder
Check continuity between the (+) side brush
holder and the base. If there is continuity, replace
the brush holder assembly.
8. Overrunning Glutch.
1) Check the pinion and spline teeth for wear
and damage and replace it if necessary. Also,
inspect the flywheel for wear and damage.
2) Rotate the pinion. The pinion must be rotated
clockwise but counterclockwise.