Troubleshooting - Graco Roof Rigs 224483 Instructions-Parts List Manual

WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
PROBLEM
Engine/sprayer won't start
Engine won't "fire" or
"pull over"
Engine operates, but
displacement pump doesn't
Also see manual 308–126.

Troubleshooting

CAUSE
Engine switch not on
Out of gas
Engine oil level low
Spark plug cable disconnected or
spark plug damaged
Adjusting the pressure control knob
doesn't start pump
Oil seepage into combustion
chamber
Pressure control switch turned OFF
Pressure setting too low
Tip clogged
Displacement pump rod seized by
dry coating
Connecting rod worn or damaged
Drive housing worn or damaged
Electrical power not energizing field
Clutch worn or damaged
Pinion assembly worn or damaged
Check everything in the guide before disassembling
the sprayer.
Relieve the pressure before disassembling the spray-
er.
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 Gra-
co 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 seepage.
Turn on pressure control switch.
Increase pressure.
Clean tip.
Service pump. See page 19.
Replace connecting rod. See page 22.
Replace drive housing. See page 23.
Check wiring connections. See page 28.
With pressure control switch ON and pres-
sure 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 clutch. See page 26.
Service pinion assembly. See page 24.