14
TROUBLESHOOTING GUIDE
WARNING
Pressure Relief Procedure
To reduce the risk of serious bodily injury, including fluid
injection, injury from splashing fluid or solvent in the
eyes or on the skin, moving parts or electric shock, al-
ways follow this procedure whenever you shut off the
sprayer, when checking or servicing any part of the
spray system, when installing, cleaning or changing
spray tips, and whenever you stop spraying.
1. Engage the gun safety latch.
2. Turn the ON/OFF switch to OFF.
3. Unplug the power supply cord.
4. Disengage the gun safety latch. Hold a metal part
of the gun firmly to a grounded metal pail. Trigger
the gun to relieve pressure.
5. Engage the gun safety latch.
6. Open the pressure drain valve, having a container
ready to catch the drainage. Leave the pressure
drain valve open until you are ready to spray again.
If you suspect that the spray tip or hose is completely
clogged, or that pressure has not been fully relieved af-
ter following the steps above, loosen the tip guard re-
taining nut or hose end coupling and VERY SLOWLY
relieve pressure gradually , then loosen completely .
Now clear the tip or hose obstruction.
Check everything in the guide before disassembling the sprayer.
MOTOR WON’T OPERATE
TYPE OF PROBLEM
WHAT TO CHECK
If check is OK, go to next check
WHAT TO DO
When check is not OK refer to this column
Basic Fluid Pressure Problems 1. Check the pressure control knob setting. The
motor will not run if it is at the minimum setting
(fully counterclockwise).
1. Slowly increase the pressure setting to see
if the motor starts.
2. Check for a clogged spray tip. Refer to the
separate gun or tip instruction manual.
2. Relieve pressure, refer to the separate gun
or tip instruction manual for tip cleaning.
Basic Mechanical Problems
1. Check for frozen or hardened paint in the
pump (29) and/or pressure control tube. Us-
ing a screwdriver, carefully try to rotate fan at
back of motor by hand. See page 20.
1. Thaw. Plug in sprayer and turn on. Slowly
increase pressure setting to see if motor
starts. If it doesn’t, see NOTE 1, below.
2. Check displacement pump connecting rod
pin (63). It must be completely pushed into
connecting rod (68) and retaining spring (65)
must be firmly in groove of connecting rod.
See page 36.
2. Push pin into place and secure with the
spring retainer.
3. Check for motor damage. Remove drive
housing assembly (8). See page 31. Try to ro-
tate fan by hand.
3. Replace motor (13) if fan won’t turn.
Basic Electrical Problems
1. Check sprayer circuit breaker (309) button to
be sure it has not popped up.
1. Depress button to reset. If circuit breaker
continues to open, see ‘Electrical Short’ on
page 19.
2. Check electrical supply with volt meter. Meter
should read 105–125 VAC.
2. Reset building circuit breaker; replace
building fuse. Try another outlet.
3. Check extension cord for visible damage.
Use a volt meter or test lamp at extension cord
outlet to check.
3. Replace extension cord.
4. Check sprayer power supply cord (31 1) for
visible damage such as broken insulation or
wires.
4. Replace power supply cord. See page 24.
5. Check motor brush leads, terminals and
brush length. Brush length should be 1/2”
minimum. See page 23.
5. Tighten terminal screws; replace brushes.
See page 23.
NOTE 1:
Thaw the sprayer if water or water–based paint has fro-
zen in it, due to exposure to low temperatures, by placing it in a
warm area. Do not try to start the sprayer until it has thawed com-
pletely. If the bourdon tube was not damaged by the freezing, the
pump should operate. If paint hardened (dried) in the sprayer ,
the pump packings and/or bare pressure control must be re-
placed. See page 34 (pump) or 27 (pressure control).
