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~-----------------------------WARNING------------------------------~
To reduce the risk
of
serious bodily injury, including fluid injection, splashing in the eyes or on the skin, or injury
from moving parts,
always
follow
the Pressure Relief Procedure Warning
as
given on page 2
or
8 before
troubleshooting
or
repairing your sprayer.
Check everything in the Troubleshooting Chart before disassembling the sprayer.
TROUBLESHOOTING
PROBLEM
CAUSE
SOLUTION
Gas
engine doesn't work properly.
Consult
engine manual, supplied.
Gas
engine operates,
but
displace-
Hydraulic
motor
stalled. See
"Starting
the Sprayer;' page 8.
ment pump doesn't operate.
Pressure setting
too
low.
Increase
pressure.
See
page
9.
Displacement pump outlet filter (if Clean the filter.
used) dirty
or
clogged.
Tip or tip filter (if used) clogged.
Remove tip
and/or
filter and clean.
Hydraulic fluid
too
low. Shut
off
sprayer and add fluid im-
mediately. *
See
page
5.
Hydraulic pump worn or damaged.
Return sprayer
for
repair.
Hydraulic motor worn or damaged. Return sprayer
for
repair.
Displacement pump rod seized
by
Service pump. See page
13.
dried paint.
Displacement pump operates, but Piston
ball check not seating properly. Service piston ball check.
See
page
13.
output
is
low
on upstroke.
Piston packings worn or damaged.
Replace packings. See page
13.
Displacement pump operates but out- Piston packings worn or damaged.
Replace packings.
See
page
13.
put
is
low
on downstroke
and/or
on
Intake valve ball check
not
seating Service intake valve ball check. See
both strokes.
properly.
page
13.
Paint leaks into wet-cup.
Loose wet-cup.
Tighten just enough to stop
leakage.
Throat packings worn or damaged.
Replace
packings.
See
page
13.
Excessive
leakage around hydraulic Piston rod or
seal
worn or damaged.
Replace
these parts.
See
manual
motor piston rod wiper.
306-98l.
Fluid delivery
is
low.
Pressure
setting too low.
Increase
pressure.
Displacement pump
outlet filter (if
Clean
filter.
used)
dirty or clogged.
Hydraulic pump worn or damaged.
Return sprayer for
repair.
Hydraulic motor wom or damaged. Return sprayer for
repair.
Large
pressure drop
in
fluid hose.
Use
larger diameter
hose.
Spitting from gun.
Air entrained
in
fluid pump or
hose.
Check for loose connections on suction
assembly, tighten, then reprime pump.
Fluid
supply
is
low
or empty.
Refill
supply container.
*Check the hydraulic fluid
level
often.
Do
not allow it to become too low.
Use
only Graco approved hydraulic fluid;
see
page
5.
307-293
11