MOTOR BRUSH REPLACEMENT
Tools Needed:
Phillips screwdriver
Flatblade screwdriver
NOTE:
New motor brushes are included with each
Packing Repair Kit, 218-033. Replace them
when replacing the packings, and/or when
they have been worn to 8 minimum of 9116”
on the longest side.
I.
2.
3.
4.
5.
6.
Remove the motor screws (I 121, washers II 13) and
cover (14). See Fig 14.
Remove the screws (H), inspection covers (J) and
gaskets (K) on each side of the motor. See Fig 14.
Loosen
the brush lead terminal screw and remove
the lead.
Push down on the spring clip slightly then pull the
clip away from and out of the brush holder. Refer to
Fig 15. Keep the spring clip.
Remove and discard the brush.
Inspect the commutator for excessive pitting, 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.
7. Place a new brush in the holder so the beveled
edges are 8s shown in the first part of Fig 15, and
the brush lead is routed as shown in the second part
of Fig 15.
8. Slowly push the tabbed end of the spring clip into
the brush holder until the clip tab engages in the
holder and the rolled portion of the tension spring
rests squarely on the brush.
9. Route the brush lead to the terminal and tighten the
terminal screws. Be sure the brush lead does not
touch any part of the armature or motor housing.
10. Test the brushes:
a. With the ON/OFF switch OFF, turn the
pressure control knob all the way counterclock-
wise to minimum pressure. Plug in the sprayer.
b. Turn the ON/OFF switch ON and slowly in-
crease the pressure until the motor comes up to
full speed.
c. Inspect the brush and commutator contact area
for excessive arcing. Arcs should not “trail” or
circle around the commutator surface.
11. Reinstall the brush inspection covers, gaskets, and
screws. Reinstall the motor cover, screws and
washers.
/
LFAN COVER
Fig 14
SPFl;-G$LIP
1
rBRUSH HOLDER
‘ATOR
SIDE VIEW OF MOTOR BRUSH INSTALLATION
MOTOR END BELL
TERMINAL SCREW
BRUSH LEAD w
-B #RUSH
SPRING CLIP-
-1
BRUSH HOLDER
1
DETAIL OF MOTOR BRUSH
SHOWN WITH MOTOR LEAD
FACING BACK OF MOTOR
Ic*,noNl
Do not run the sprayer dry for more than 36
seconds while checking the brushes to avold
damaging the displacement pump.
Fig 15
18
307-643
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