Magnum 261800, Repair And Parts Manual

Page: 20 / 52

Basic Troubleshooting
20 312004B
When paint is sprayed, it runs down the
wall or sags. Coat is going on too thick. Move gun faster.
Choose a tip with smaller hole size.
Choose tip with wider fan.
Make sure gun is far enough from
surface.
When paint is sprayed, coverage is
inadequate. Paint coating is going on too thin. Move gun slower.
Choose tip with larger hole size.
Choose tip with narrower fan.
Make sure gun is close enough to
surface.
Fan pattern varies dramatically while
spraying.
OR
Sprayer does not turn on promptly when
resuming spraying.
SR7, ProX7 and ProX9 - Pressure control
switch is worn and causing excessive
pressure variation. Take sprayer to Graco/M
AGNUM
authorized service center.
Cannot trigger spray gun. Spray gun trigger lock is locked. Rotate trigger safety lever to unlock
trigger lock, page 14.
Paint is coming out of pressure control
switch. SR7, ProX7 and ProX9 - Pressure control
switch is worn. Take sprayer to Graco/M
AGNUM
authorized service center.
Prime/Spray valve actuates automatically
relieving pressure through prime tube. System is over pressurizing. Take sprayer to Graco/M
AGNUM
authorized service center.
Paint leaks down outside of pump. Pump packings are worn. Replace pump packings.
Motor is hot and runs intermittently.
Motor automatically shuts off due to
excessive heat. Damage can occur if
cause is not corrected.
Thermal Overload , page 5.
Vent holes in enclosure are plugged or
sprayer is covered. Keep vent holes clear of obstructions and
overspray and keep sprayer open to air.
Extension cord is too long or not a heavy
enough gauge. Replace extension cord. Read
Grounding and Electrical
Requirements
, page 5.
Unregulated electrical generator being
used has excessive voltage. Use electrical generator with a proper
voltage regulator. Sprayer requires
120VAC, 60 Hz, 1500-Watt generator.
Sprayer was operated at high pressure
with very small tip which causes frequent
motor starts and excessive heat build up. Decrease pressure setting or increase tip
size.
Building circuit breaker opens after
sprayer operates for 5 to 10 minutes. Too many appliances are plugged in on
same circuit. Free up circuit (unplug things), or use a
less busy circuit.
Sprayer electrical cord is damaged. Check broken insulation or wires.
Replace electrical cord if damaged.
Extension cord is damaged or too long or
not a heavy enough gauge. • Plug in something that you know is
working to test extension cord.
• Replace extension cord.
Prox7 and ProX9 - Fold ‘n Store handle
does not actuate Dirty or dried paint Clean handle parts.
Problem Cause Solution