Kohler Command CV730 User Manual

Page 150

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8.34

Section 8
Electrical System and Components

Figure 8-56. Checking Brushes.

Armature

1. Clean and inspect the commutator (outer

surface). The mica insulation must be lower than
the commutator bars (undercut) to ensure proper
operation of the commutator. See Figure 8-57.

Figure 8-58. Checking Armature.

3. Check for continuity between the armature coil

segments and the commutator segments. See
Figure 8-58. There should be no continuity. If
continuity exists between any two, the armature
is bad.

4. Check the armature windings/insulation for

shorting.

Shift Fork

Check that the shift fork is complete, and the pivot
and contact areas are not excessively worn, cracked or
broken.

Figure 8-57. Commutator Mica Inspection.

2. Use an ohmmeter set to the Rx1 scale. Touch the

probes between two different segments of the
commutator, and check for continuity. See Figure
8-58. Test all the segments. Continuity must exist
between all or the armature is bad.

Wear limit length:

7.6 mm (0.300 in.)

Commutator O.D.

Mica Insulation

Continuity Check

Armature
Coil

Insulation
Check

Inspection

Drive Pinion

Check and inspect the following areas:

a. The pinion teeth for abnormal wear or damage.

b. The surface between the pinion and the clutch

mechanism for nicks, or irregularities which
could cause seal damage.

c. Check the drive clutch by holding the clutch

housing and rotating the pinion. The pinion
should rotate in one direction only.

Brushes and Springs

Inspect both the springs and brushes for wear, fatigue,
or damage. Measure the length of each brush. The
minimum length for each brush is 7.6 mm (0.300 in.).
See Figure 8-56. Replace the brushes if they are worn
undersize, or their condition is questionable.

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