04791
Fig. 15
301
315
317
307
314
20
308-560
11.
Test the brushes.
a. Remove the pump connecting rod pin.
b. With the sprayer OFF, turn the pressure con-
trol knob fully counterclockwise to minimum
pressure. Plug in the sprayer.
c. Turn 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
ELECTRIC SHOCK 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 bodily injury.
Do not run the sprayer dry for more than 30
seconds while checking the brushes to avoid
damaging the displacement pump packings.
CAUTION
12. Install the brush inspection covers and gaskets.
13.
Break in the brushes.
Operate the sprayer for at
least one hour with no load. Install the connecting
rod pin.
Power Supply Cord Replacement (Fig. 15)
WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
follow the illustrated
Pressure Relief
Procedure
warning on page 12 when-
ever you are instructed to relieve pressure.
NOTE:
Read the GENERAL REPAIR INFORMATION
on page 18 before doing this procedure.
1. Relieve pressure.
2. Remove the pressure control board/cover (301).
3. Disconnect the power supply cord (314),
both leads from the ON/OFF switch (307), and
the green wire to the grounding screw (317).
4. Loosen the strain relief bushing (315) and remove
the power supply cord (314).
5. Install the new power supply cord in the reverse
order.
6. Install the proper plug on the other end of the
power supply cord. Follow all local codes to select
the proper plug.