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Motor
Brushes
9. Test the brushes.
a.
Remove the pump connecting rod pin (17).
See Fig. 18, page 22.
b.
With the sprayer OFF
, turn the pressure con
-
trol knob fully counterclockwise to minimum
pressure. Plug in the sprayer
.
c. T
urn the sprayer ON. Slowly increase the
pressure until the motor is at full speed.
d. Inspect
the brush and commutator contact
area
for excessive arcing. Arcs should not trail or
circle
around the commutator surface.
WARNING
MOVING P
ARTS HAZARD
Do not touch the brushes, leads, springs
or brush holders while the sprayer is
plugged in to reduce the risk of electric
shock and serious injury
.
10.
Install the brush inspection covers and gaskets.
11.
Break in the brushes.
Operate the sprayer for at
least one hour with no load. Install the pump
connecting rod pin. See Fig. 18, page 22.