Troubleshooting
3A4180C 29
Sprayer will not shut off after
reaching or exceeding maximum
pressure.
Check pressure control. Disconnect pressure control, if
sprayer still runs, replace control
board. If the sprayer stops, replace
pressure control.
Basic electrical problems Motor leads are securely fastened
and properly mated
Replace loose terminals; crimp to
leads. Be sure terminals are firmly
connected.
Clean circuit board terminals.
Securely reconnect leads.
For loose motor brush lead
connections and terminals.
Tighten terminal screws. Replace
brushes if leads are damaged.
Brushes must be 1/2 in. [13mm]
minimum. NOTE: Brushes do not
wear at the same rate on both sides
of motor. Check both brushes.
Replace brushes.
Broken or misaligned motor brush
springs. Rolled portion of spring
must rest squarely on top of brush.
Replace spring if broken. Realign
spring with brush.
Motor brushes may be binding in
brush holders.
Clean brush holders. Remove
carbon with small cleaning brush.
Align brush leads with slot in brush
holder to assure free vertical brush
movement.
Motor armature commutator for
burn spots, gouges or extreme
roughness.
Remove motor and have motor
shop resurface commutator if
possible.
Problem What to Check How to check
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