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38 334466A
Basic electrical problems Motor leads are securely fastened
and properly mated
Replace loose terminals; crimp to
leads. Be sure terminal are firmly
connected.
Clean circuit board terminals.
Securely reconnect leads.
For loose motor brush lead
connections and terminals.
Tighten terminal screws. Replace
brushes if leads are damaged.
Brushes must be 1/2 in. [13mm]
minimum. NOTE: Brushes do not
wear at the same rate on both sides
of motor. Check both brushes.
Replace brushes.
Broken or misaligned motor brush
springs. Rolled portion of spring must
rest squarely on top of brush.
Replace spring if broken. Realign
spring with brush.
Motor brushes may be binding in
brush holders.
Clean brush holders. Remove carbon
with small cleaning brush. Align brush
leads with slot in brush holder to
assure free vertical brush movement.
Motor armature commutator for burn
spots, gouges or extreme roughness.
Remove motor and have motor shop
resurface commutator if possible.
Problem What to Check How to check