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Do not wash the armature and brushes in any 2. Inspect all threaded areas for damaged or stripped threads. 3. Inspect the brush holder assembly and brushes for damage or wear. Using a calipers, measure the Fig. 5-68 AI030 4. Inspect brush leads for cracks, wear, or fraying. If any of these conditions exist, replace the brushes as 5. Inspect the end-cap bushing for wear. Using a calipers, measure inner diameter at the end-cap Fig. 5-69 AI031 6. Inspect the front-cap bushing for wear. Using a calipers, measure the inner diameter of the Fig. 5-70 AI032 7. Inspect the brass commutator end of the armature for any burned spots or damage. If the commutator Do not use emery cloth to clean the commutator 8. Inspect the commutator end for buildup in the grooves. Buildup in the grooves must be removed to Fig. 5-71 AI033 NOTE: After cleaning any buildup from the commutator, use compressed air to clean. 9. Inspect the armature for shorting. Use the multitester and the following procedure: A. Set the selector on the X1K position; then touch the leads and zero the meter. ! CAUTION ! CAUTION 5-46 |