Troubleshooting
334730F
35
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