Graco Husky 205 D120 Series Instructions Manual page 12

PROBLEM
The pump will not cycle, or it cycles
once and stops.
PROBLEM
The pump will not prime or loses
prime.
The pump leaks air or does not
operate.
12 308652ZAS
Troubleshooting
Internal Air Valve-Operated Pumps Only
CAUSE
The air valve is stuck or dirty.
Not enough air pressure supplied.
Remote Solenoid-Operated Pumps Only
CAUSE
The cycle rate is too low.
The check valves (20) are not
sealing.
Fluid manifold not mounted with
OUT port up.
Air is supplied to Port A and Port B at
the same time.
Solenoid exhaust is plugged.
SOLUTION
Disassemble and clean or repair the
air valve. See page 13.
Use filtered air.
Increase air pressure supply. Do not
exceed maximum input pressure.
SOLUTION
Increase cycle rate to 60 cpm.
Inspect the check valves, and
replace them if worn or damaged.
See page 15.
Re-mount fluid manifold so OUT port
is up.
Replace both diaphragms (30).
See page 14.
Check your installation. See page 8.
Ensure that exhaust (G on page 8)
is free of obstructions.