Graco 231-032 A Series Instructions And Parts List page 22

MOTOR
BRUSH REPLACEMENT
Tools Needed:
Phillips screwdriver
flatblade screwdriver
NOTE:
Replace the brushes when they have worn
to no l e s s than 1/2 in. See STEP 1, Fig 14.
Note that the brushes wear differentlv on
each side of the motor. Brush Repsi; Kit
220-349 is available.
CAUTION
seconds while checking the brushes to avoid
Do not run the sprayer dry for more than
30
damaging the displacement pump.
11. Reinstall the brush inspection covers, gaskets, and
screws. Reinstall the motor cover, screws end
washers.
WARNING
Before doing this procedure, follow the Pressure
the risk of injection injury, injury from moving
Relief Procedure Warning on page 13 to reduce
1. Remove the motor cover (14). See Fig 13.
2. Remove the screws (HI, inspection covers (Jl and
gaskets (Kl on each side of the motor. See Fig 13.
3. Push down and then in on the spring clip slightly,
and then pull the clip in end out of the brush holder.
Refer to STEP 3, Fig 14. Keep the spring clip.
4. Loosen the brush lead terminal screw and remove
the lead.
5. Remove and discard the brush.
6. Inspect the commutator for excessive pining, burn-
ing or gouging.
NOTE:
A black color on the commutator is normal.
Have the commutator resurfaced by a
qualified motor repair shop if the brushes
seem to be wearing too fast.
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7. Place a new brush in the holder
so
the lead is st the
top of the holder. Place the brush lead terminal on
the terminal screw so the terminal is parallel with
the brush holder. lighten the terminal screw. See
STEP 1, Fig 14.
8. Wnh the spring roll touching the brush, push the
forked end of the spring clip into the brush holder.
See STEP 2, Fig 14. When the fork passes through
the end of the holder, push the clip up or down until
the fork hooks the end of the holder. See STEP 3,
Fig 14.
9. Position the brush lead as shown in STEP 3, Fig 14.
Be sure the brush lead does not touch any part of
the armature or motor housing.
8.
With
the ONlOFF switch OFF, turn the
wise to
minimum pressure. Plug in the sprayer.
pressure control knob
all
the way counterclock-
b. Turn the ON/OFF switch ON and slowly in-
crease the pressure until the motor comes up to
full speed.
10. Test the brushes:
c. Inspect the brush and commutator contact area
for excessive arcing. Arcs should not "trail" or
circle around the commutator surface.
WARNING
Do not touch the brushes, leads, springs or brush
the risk of electric shock and serious bodily injury.
holders while the sprayer is plugged in to reduce
n
307-758
D OF MOTOR
To mmova brush. push
down and In. and than
pull out sprlng cllp
Fork mum
hook holdar
when InMlllng
down and In. and ihsn
pull out sprlng cllp
BRUSH LEAD
Fig
i 4
.