Page 163 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

11 Check for wear and replace the armature if the diameter is below limit. (Fig 4)
12 Clean the commutator surface by using 400 emery cloth.

Fig 3 Fig 4

TASK 5: Check continuity of field coils

1 Using an ohmmeter, check for continuity between the field coil and the insulated brush. If continuity is not
indicated, the insulation has failed. Replace the insulation between the brush and yoke. (Fig 1)
Brush

2 Measure the length of the brushes. If brushes are worn down to the service limit, replace them. (Fig 2)
Brush spring
3 Check the brush spring for tension, rust or breakage

Fig 1 Fig 2

TASK 6 : Check over-running clutch
1 Inspect the one way clutch for free rotation indirection ‘A’, and locked up the other way round. (Fig 1)
2 Check the pinion for abnormal wear and replace it as assembly if required.

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CITS : Automotive - Mechanic Diesel - Exercise 9.2