Troubleshooting - Graco LineLazer GM 3500 Manuel D'instructions

WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
Check everything in the chart before disassembling the sprayer.
PROBLEM
Engine/sprayer won't start
Engine won't "fire"
Engine operates, but displacement
pump doesn't
Engine starts but dies
Displacement pump output low on
upstroke

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
Oil level drops below oil sensor
Pump inlet screen clogged
Piston ball check not seating
Piston packings worn or damaged
Sleeve gasket in displacement pump
worn or damaged
SOLUTION
Turn on engine switch.
Refill gas tank.
Try starting engine. If light on rear of engine
glows, replenish oil.
Connect cable on top of engine or replace spark
plug.
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 spray-
er upright to avoid oil seepage.
Turn on pressure control switch.
Increase pressure.
Clean filter.
Clean tip or tip filter.
Service pump. See 307–806.
Replace connecting rod. See page 28.
Replace drive housing. See page 29.
Check wiring connections. See page 35.
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 authorized
Graco dealer.
Service clutch. See page 32.
Service pinion assembly. See page 30.
Add oil.
Clean screen.
Service piston ball check. See 307–806.
Replace packings. See 307–806.
Replace sleeve gasket. See 307–806.