Graco Magnum ProX7 Operation page 26

Problem
When paint is sprayed, coat is not covering.
Motor is hot and runs intermittently.
This is NOT a thermal overload condition.
Motor automatically shuts off due to excessive
heat. Damage can occur if cause is not cor-
rected.
Thermal Overload, page 5.
Building circuit breaker opens after sprayer
operates for 5 to 10 minutes.
Fan pattern varies dramatically while spraying.
OR
Sprayer does not turn on promptly when
resuming spraying.
Cannot trigger spray gun.
Spray comes out of spray gun in two thick
streams.
Paint is coming out of pressure control switch.
Prime/Spray valve actuates automatically
relieving pressure through prime tube.
Paint leaks down outside of pump.
26
Cause
Coat is going on too thin.
Vent holes in enclosure are plugged or sprayer
is covered.
Extension cord is too long or not a heavy
enough gauge.
Unregulated electrical generator being used
has excessive voltage.
Sprayer was operated at high pressure with
very small tip which causes frequent motor
starts and excessive heat build up.
Too many appliances are plugged in on same
circuit.
Sprayer electrical cord is damaged.
Extension cord is damaged or too long or not a
heavy enough gauge.
Pressure control switch is worn and causing
excessive pressure variation.
Spray gun trigger lock is locked.
Reversible spray tip is in UNCLOG position.
Pressure control switch is worn.
System is over pressurizing.
Pump packings are worn.
Troubleshooting
Solution
Move gun slower.
Choose tip with larger hole size.
Choose tip with narrower fan.
Make sure gun is close enough to surface.
Keep vent holes clear of obstructions and
overspray and keep sprayer open to air.
Replace extension cord. Read Grounding and
Electrical Requirements, page 5.
Use electrical generator with a proper voltage
regulator. Sprayer requires 120VAC, 60 Hz,
1500-Watt generator.
Decrease pressure setting or increase tip size.
Free up circuit (unplug things), or use a less
busy circuit.
Check broken insulation or wires. Replace
electrical cord if damaged.
• Plug in something that you know is work-
ing to test extension cord.
• Replace extension cord.
Take sprayer to Graco/M
AGNUM
service center.
Rotate trigger safety lever to unlock trigger
lock, page 8.
Rotate arrow-shaped handle on spray tip so it
points forward in SPRAY position, page 12.
Take sprayer to Graco/M
AGNUM
service center.
Take sprayer to Graco/M
AGNUM
service center.
Replace pump packings.
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