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307-724 17
PROBLEM CAUSE SOLUTION
Electric motor labors when start-
ing, and trips building circuit
breaker
or fuse
Motor capacitor has failed
Replace the capacitor
. See page 22.
Circuit board has failed
Replace the circuit board. See page 23.
Paint leaks into wet–cup
Throat packings are worn or damaged
Replace the packings. See page 18.
Excessive
surging
from spray gun
Spray
tip or fluid filter is plugged
Disassemble and clean.
Spray tip too big or worn
Change the spray tip.
Paint too viscous
Thin the paint.
W
rong type hose
Use minimum 50 ft. (15.2 m), static–free nylon
hose
(wire braid hose is unacceptable).
Not enough paint pressure
Pressure setting too low
Increase pressure.
Spray tip too big or worn
Change the spray tip.
Pressure
control frozen
2
or damaged
by
over–pressurization
3
Try
to thaw
, or replace pressure control.
Displacement pump worn or damaged
Replace
the displacement pump.
See page 18.
Tails
or fingers in spray pattern
Pressure setting too low
Increase pressure.
Fluid outlet filter is dirty or clogged
Clean the filter. See page 14 or manual
307–273.
Spray
tip too big or worn
Change the spray tip.
Fluid supply is low or empty
Refill
and prime the pump. See page 10.
Check
fluid supply often to prevent running the pump
dry.
Paint too viscous
Thin the paint.
W
rong type hose
Use minimum 50 ft. (15.2 m), static–free nylon
hose
(wire braid hose is unacceptable).
Paint runs or sags
Spray tip too big or worn
Change the spray tip.
Spitting from gun
Air in fluid pump or hose
Check
for loose
connections at pump intake and
tighten.
Then prime the pump. See page 10.
T
ip partially clogged
Clear the tip. See page 1
1.
Fluid supply is low or empty
Refill
and prime the pump. See page 10.
Check
fluid supply often to prevent running the pump
dry.
Static
sparking from the gun
Spray
or work being sprayed is not prop
-
erly
grounded
Correct problem before continuing. Follow the
warning section, FIRE OR EXPLOSION HAZ-
ARD
on page 3.
1
The
electric motor has an over–temperature switch
which automatically resets upon cooling. If it opens
and the electric motor shuts itself off, unplug the
power supply cord and let the sprayer cool for 30 to
60 minutes. Always use the lowest pressure setting
needed when spraying. Prevent overspray from
restricting the motor air passages; check and clean
often.
2
Freezing
results from failure to replace the water–
base paint or flushing water with mineral spirits, and
usually causes permanent damage to the pressure
control.
3
Over–pressurization
results from (1) using less than
50 ft. (15.2 m) of nylon spray hose, (2) from using a
wire braid spray hose, (3) from adding a shutof
f de
-
vice between the pump outlet and the spray gun, (4)
from attaching a spray hose to the pressure drain
valve, or (5) from using a clogged or incorrectly as
-
sembled filter
.