MOTOR
WARNING
NOTE:
New motor brushes are included with each
Packing Repair Kit. Replace them when
replac-
worntoaminimumof14mmonthelongestside.
ing the packings, and/or when they have been
1.
Remove the motor cover screws
(1
19)
and cover
(14).
See
Fig
33-1.
2. Remove the screws
(H),
inspection covers
(J)
and
gaskets (K) on each side of the motor. See
Fig33-I.
3. Loosen the brush lead terminal scrsw and remove
the lead.
4.
Push down on the spring clip slightly then pull the clip
away from and out
ofthe brush holder.
Refer
to
Fig
33-2.
Keep the spring clip.
5.
Remove and discard the brush.
6.
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.
Placea new brush in the holder
so
the bevelededges
are as shown in the first part of Fig 33
-
2, and the
brush lead is routed as shown in the second part of
Fig
33-2.
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 counterclockwise
to
minimum pressure. Plug in the sprayer.
b. Turn the
ON/OFF switch ON and slowly increase
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
"
orcir-
cle around the commutator surface.
Do not touch the brushes, leads, springs or brush
WARNING
holders while the sprayer is plugged in to avoid
electric shock and possible serious bodily injury.
REPLACEMENT
Fig
33
-
1
SPRING
CLIP
107-398
\
,
BRUSH
HOLDER
'
BRUSH
107-149
COMMUTATOR
CAPACITOR
\
BRUSH HOLDER
/
MOTOR
END
BELL
Fig 33
-
2
ICAUTIONl
while checking the brushes
to
avoid damaging the
Do
not
run the sprayer dry for more than
30
seconds
disDlacement DumD.
11.
Reinstall the brush inspection covers, gaskets, and
screws. Reinstall the motor cover and screws.
307-670
33
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