Troubleshooting - Graco GM3500 Instructions-Parts List Manual

WARNING
To reduce the risk of serious bodily injury always
follow the Pressure Relief Procedure Warning on
page 12 before checking, adjusting, cleaning or
shutting down the sprayer.
Check everything in the chart before disassembling the sprayer. (Continued on page 15)
PROBLEM
Engine/sprayer won't start
Engine won't "pull over"
Engine operates, but dis-
placement pump doesn't

Troubleshooting

CAUSE
Engine switch not on
Out of gas
Engine oil level low
Spark plug cable disconnected or
spark plug damaged
Water frozen in pressure control
Oil seepage into combustion
chamber
Pressure control switch turned OFF
Pressure setting too low
Displacement pump outlet filter
dirty
Tip or tip filter clogged
Displacement pump rod seized by
dry paint
Connecting rod worn or damaged
Drive housing worn or damaged
Electrical power not energizing field
Clutch worn or damaged
Pinion assembly worn or damaged
SOLUTION
Turn on.
Replenish
Try starting engine. If light on rear of en-
gine glows, replenish oil.
Connect cable on top of engine or re-
place spark plug. See Fig. 1, page 5.
Return pressure control to authorized
Graco dealer for repair.
Remove spark plug. Pull starter rope 3 or
4 times. Clean and replace plug. Try to
start. Keep sprayer upright to avoid oil
leakage. See last CAUTION on page 10.
Turn on.
Increase pressure.
Clean filter.
Clean tip or tip filter.
Service pump. See page 18.
Replace. See page 18.
Replace. See page 19.
Check wiring connections. See pages 16
and 33.
With pressure control switch ON and
pressure turned to MAXIMUM, use a test
light to check continuity across black and
white wires from pressure control.
Have pressure control checked by autho-
rized Graco dealer.
Service. See page 24.
Service. See page 20.