18
308800
Motor Brush Replacement
NOTE:
Replace brushes worn to less than 1/2 in. Note
that brushes wear differently on each side of mo-
tor, so check both. Brush Repair Kit 220853 is
available. A new spring clip, 110816, may be
purchased separately.
WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the
Pressure Relief
Procedure
on page 7.
NOTE:
Read
General Repair Information
on page 16
before doing this procedure.
1.
Relieve pressure.
2.
Remove motor shield (54). Remove inspection
covers (B) and gaskets on each side of motor.
See Fig. 11.
B
54
Fig. 11
7703B
3.
Push in spring clip to release hooks from brush
holder. Pull out spring clip. See Fig. 12.
Fig. 12
SPRING CLIP
110–816
HOOK
SPRING
01227
BRUSH
4.
Loosen brush lead terminal screw. Pull brush lead
away, leaving motor lead terminal in place. Re-
move brush and spring. See Fig. 14.
5.
Inspect commutator for excessive pitting, burning
or gouging. A black color on commutator is normal.
Have commutator resurfaced by a qualified motor
repair shop if brushes seem to wear too fast.
CAUTION
When installing the brushes, follow all steps carefully
to avoid damaging the parts.
6.
Install new brush so lead is in long slot of holder.
See Fig. 13.
Fig. 13
BRUSH
SHORT SLOT
LONG SLOT
BRUSH HOLDER
NOTE: SPRING MUST COIL
IN THIS DIRECTION
SPRING
CLIP
01227
7.
Slide terminal under terminal screw washer and
tighten screw. Be sure motor lead is still connected
at screw. See Fig. 14.
Fig. 14
SPRING
BRUSH LEAD
TERMINAL SCREW
MOTOR LEAD
TERMINAL
BRUSH
SPRING CLIP
01227
8.
Place spring on brush as shown in Fig. 13.
9.
Install spring clip and push it down to hook short
slots in housing. See Fig. 13.
10. Repeat for other side.
