Troubleshooting - Graco A Series Repair And Parts Manual

WARNING
To reduce risk of injury due to sprayer starting
unexpectedly, shut off engine before performing
checks or service.
Check everything in chart before disassembling sprayer.
PROBLEM
Engine does not start
Engine does not fire
Engine operates, but
displacement pump does not displ cement p mp does not
Engine starts but dies
Sudden pressure loss

Troubleshooting

CAUSE
Engine switch not ON
Out of gas
Engine oil level low
Spark plug cable disconnected or
spark plug damaged
Oil seepage into combustion
chamber
Flow control set wrong
Air supply to air control or gun is
not connected
Air compressor not on
Engine RPM too low
Air leak at pump foot valve or
siphon tube elbow
Tip clogged
Insufficient compressor air
Displacement pump rod seized by
dry coating
Connecting rod worn or damaged
Drive housing worn or damaged
Clutch worn or damaged
Pinion assembly worn or damaged
Oil level drops below oil sensor
System has overpressurized, which
opened Pressure Drain Valve
Air to sprayer or gun stopped
SOLUTION
Turn engine switch ON
Fill gas tank
If engine oil light glows, add oil.
Connect spark plug cable or replace
spark plug
Remove spark plug. Pull starter rope 3 or
4 times. Clean and install spark plug. Try
to start. Keep sprayer upright to avoid oil
seepage.
Set in PRIME mode
Check and tighten connections
Start compressor
Increase engine speed
Be sure foot valve is tight each day.
Be sure seal in elbow is in place and is
not worn or damaged.
Clean tip
Increase SCFM or compressor size.
System requires a minimum of 30 psi
(0.28 MPa, 2.8 bar) to operate.
Service pump. See page 7.
Replace connecting rod. See page 10.
Replace drive housing. See page 11.
Service clutch. See page 14.
Service pinion assembly. See page 12.
Add oil
Check for plugged tip or hose and correct.
Restart pump.
Check, correct.
309662 5