Troubleshooting - Graco 311772H Repair Manual

Troubleshooting

Problem
Sprayer won't run
Pump won't pump material
Material runs out of bottom of sprayer Pump hose worn out
No air from compressor
311772G
Troubleshooting
Cause
Power switch not on
No power at wall outlet
Wrong size generator
Breaker tripped
Air lock
Selector switch in wrong position
Mix too thick
Loose fittings
Plugged gun
Pump hose worn out
Pump cold
Loose fittings
Gun air valve closed
Low voltage
Gun needle plugged
Worn compressor
Lines not connected
Damaged hose
Solution
Turn switch on.
Check outlet by plugging in another
appliance. If appliance does not
work, try another outlet.
Use a 3500 watt or larger generator.
Refer to Generator Requirements,
page 6.
Reset breaker.
Open air valve on gun.
Move selector switch to correct posi-
tion for application.
Add water to thin material. Use Mate-
rial Thickness Gauge.
Check and retighten all fittings.
Relieve Pressure, page 6. Remove
gun from hose. Clean gun.
Replace hose. Recommended hose
replacement - once every year.
Move pump to warm room and allow
it to warm up or run hot water through
sprayer.
Replace hose.
Check and retighten all fittings.
Open gun air valve.
Check extension cord length and
gauge. Replace if different than rec-
ommended. Refer to Grounding and
Electrical Requirements, page 6.
Clean needle and retry.
Replace compressor. Contact a qual-
ified Graco Service Center.
Check all quick disconnect connec-
tions to gun and hoses.
Replace hose.
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