Troubleshooting
3A6748B 39
Troubleshooting
1. Follow Pressure Relief Procedure,
page 19, before checking or repairing.
2. Check all possible problems and causes
before disassembling unit.
Motor Will Not Operate
Problem Cause Solution
Basic Fluid Pressure Problems Pressure control knob setting.
Motor will not run if at minimum
setting (fully counterclockwise).
Slowly increase pressure setting to
see if motor starts.
Spray tip or fluid filter may be
clogged.
Relieve pressure and clear clog or
clean filter; refer to separate gun or
tip instruction manual.
Pump mode switch is not in the
proper position (6912).
Place the pump mode switch in
proper position for application.
Up: Pressure Mode
Middle: Remote Control
Down: Flow Mode
Builds pressure but material will not
come out.
Perform Pressure Relief
Procedure, page 19. Check
applicator, hose, and pump for
packout. May need to remove outlet
spring if packout in pump is
reoccuring.
Basic Mechanical Problems Frozen or hardened paint. Thaw sprayer if water or
water-based paint has frozen in
sprayer. Place sprayer in warm area
to thaw. Do not start sprayer until
thawed completely. If paint
hardened (dried) in sprayer, replace
pump packing. See Pump Repair,
page 58.
Displacement pump connecting rod
pin. Pin must be completely pushed
into connecting rod and retaining
spring must be firmly in groove of
pump pin.
Push pin into place and secure with
spring retainer.
Motor. With machine unplugged,
remove drive housing assembly.
Try to rotate fan by hand.
Replace motor if fan won't turn.
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