Motor Diagnostics
16 3A1222B
Motor Diagnostics
Check for electrical continuity in motor armature, windings and brush as follows:
Rotate motor and inspect bearings and shaft for proper fit. There should be no clearance. Inspect gear train for wear
or binding. Check armature and field winding for discoloration (dark brown) and burnt odor. Replace motor if burning
has occurred. Inspect commutator and brushes for wear and arcing. If commutator surface is pitted and uneven in
color, replace motor.
If Motor Diagnostics reveal a damaged motor or if motor brushes are shorter than 1/4 in. (6.4 mm) or if the motor
shaft cannot turn, replace the motor using Motor Kit, page 15.
Setup
1. Relieve pressure, page 8.
2. Unplug electric cord.
3. Remove enclosure and disconnect motor leads from
control card.
4. Remove four screws and front cover.
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