Graco TexSpray 1030 FC Repair Manual page 9

Troubleshooting (Continued)
PROBLEM
Displacement pump output
low on downstroke or both low on downstroke or both
strokes
Material leaks into wet-cup
Material leaks into wet-cup
Intermittent material flow out
of gun
Heavy or poorly atomized mate-
rial when gun is first triggered
(lack of soft start) ( )
Pump does not shut off after
gun trigger is released
Premature prime valve fail-
ures
CAUSE
Siphon hose strainer is clogged
Piston packings worn or damaged
Intake valve ball (216) not seating
properly
Clutch (9) worn or damaged
Air leak at pump foot valve or
siphon tube elbow
Loose wet-cup (202)
Throat packings worn or damaged
Displacement rod (201) worn or
damaged
Material supply is low or empty
Air control on gun is set too high.
Hose too long or material too
coarse
Fluid pressure was not allowed to
fully self relieve after releasing gun
trigger
Gun was not fully triggered immedi-
ately when squeezed, causing gun
air passages to clog with material.
Air valve failure
Air flow sensor dirty or damaged
Air leaks in the system after the air
flow sensor
Air leaks in gun
Air flow sensor dirty or damaged
Pump does not shut off after gun
trigger is released.
SOLUTION
Clean strainer
Replace packings. See page 12.
Clean and service intake valve. See
page 12.
Replace clutch. See page 18.
Be sure foot valve is tight each day.
Be sure seal in elbow is in place and is
not worn or damaged.
Tighten wet-cup enough to stop leakage
Replace packings. See page 12.
Replace displacement rod. See page 12.
Refill and prime pump. See Startup proce-
dure in operator manual. Check material
supply often to prevent running pump dry.
Reduce the air flow through the gun by
turning the air control knob on the back of
the gun.
Change to a shorter hose or less coarse
material.
Wait longer between releasing gun trigger
and re--triggering.
Always squeeze trigger fully to prevent
just air from turning on, which starts pump
and pressurizes hoses. Disassemble and
clean gun.
Check and replace as needed
Check air filter.
Clean air flow sensor (see page 4) or re-
place as needed.
Check and tighten all connections be-
tween the air flow sensor and the gun.
Check gun for excessive air leaks and re-
pair.
See manual 309661
Check air filter.
Clean air flow sensor (see page 4) or re-
place as needed.
Read "Pump does not shut off after gun
trigger is released" and fix appropriate
problem.
Repair or replace Prime Valve.
See page 19.
309662 9