Motor Brushes
9.Test the brushes.
a.Remove the pump connecting rod pin (17). See Fig. 18, page 21.
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
MOVING PARTS 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 21.
