Troubleshooting Guide - Graco E Series Instructions-Parts List Manual

Relief
Pressure Procedure
To reduce of
the risk serious bodily injury,
fluid
iniection. from
the
alwaysfollowthisprocedurewhenever you shut off the
when
svstem. installing,
gun
safety latch.
Turn the switch to
the
3.
Unplug power supply
gun safety
4. Disengage the
in guide before disassembling the sprayer.
:heck everything the
TYPE PROBLEM
Basic Fluid Pressure
Problems
Basic Mechanical Problems
E %ask Electrical Problems
Thaw the sprayer if water or water-based paint has frozen in it, due to exposure to low temperatures, by placing it in
not try to start the sprayer until it has thawed completely. I f the bourdon tube was not damaged by the freezing,the pump should
operate. If paint hardened (dried) in the sprayer, the pump packings andlor bare pressure control must bereplaced. See page
manual 307-793.
When replacing the bare pressure control box (item
and reinstall these parts in the bare box.

TROUBLESHOOTING GUIDE

WARNING
including
park or electric shock,
changing
spraying.
OFF.
cord.
latch.
TO CHECK
WHAT
If check is OK, go to the next check.
The motor will not run if it is at the mini-
mum setting (fully counterclockwise).
separate gun or tip instruction manual.
1. Check for frozen or hardened paint in the
pump (39) andlor pressure control bour-
don tube. Using a screwdriver, carefully
try to rotate fan at back of motor by hand.
See page 19.
Check displacement pump connecting
2.
rod pin (20). It must be completelypushed
into connecting rod (3) and retaining
spring (35) should be firmly in groove 01
connecting rod. See page 31.
3. Check for.motor damaae. Remove drive
housing assembly~(2). 3ee page 32. Try
to rotate fan by hand.
Check electrical supply with volt meter.
Meter should read 190-250 Volts.
2. Check extension cord for visible damage.
Use a volt meter or test lamp at extension
cord outlet to check.
3. Check sprayer power supply cord
for visible damage such as broken insula-
tion or wires.
Check motor brush leads. terminals and
4.
brush length. Brush length should be
mm minimum. See page 33.
remove the OWOFF switch, bridge, circuit board and electrical hardware
a metal part
'5. Hold of the gun
metal pail, and trigger
grounded
to
ready catch the drainage.
Leave the pressure drain valve open until you are
8.
again.
ready to spray
clogged, orthatpressure has notbeen
following above,
ter the steps
nut or hose end coudina and
auard retainina
part
SLOWLY the
ally, loosen
then completely.
obstruction.
TO DO
WHAT
not OK,
If check is
Slowly increase the pressure setting to see
1.
if the motor starts.
2. Relieve pressure, refer to your separate
gun or tip instruction manual.for tip clean-
ing.
1. Thaw. Plug in sprayer and turn on. Slowly in-
crease pressure setting to see if motor
starts. If it doesn't, replace the displace-
ment pump packings (see manual
307-793) andlor replace the bare pressure
control box (301). See page 27.
Push pin into place and secure with the re-
2.
taining spring.
3. Replace motor
1. Reset building circuit breaker: replace
building fuse. Try another electrical outlet.
Replace extension cord.
2.
3. Replace power supply cord. See page 22.
4. Tighten terminal screws; replace brushes.
14 See page 33.
of a
to the side
firmly
gun to
the relieve
having
or hose is complete/y
tip
fullyrelievedaf-
a tip
wrap rag around the
VERY
to gradu-
relieve pressure
Now or
clear the tip hose
refer to this column.
if fan won't turn.
(1)
a
warm area. Do
27
or