Graco Reactor A-25 Repair Parts page 17

PROBLEM
Fluid pressure low or dropping
Pump output low, but pressure is nor-
mal
One pressure gauge drops when
pumps are stalled on both the
upstroke and the downstroke
One pressure gauge drops when
pumps are stalled on the downstroke,
but not the upstroke
One pressure gauge drops when
pumps are stalled on the upstroke,
but not the downstroke
A side rich; lack of B side
B side rich; lack of A side
3A1570L
CAUSE
Air supply pressure low when spray-
ing
Icing in air motor exhausts or mufflers Check inlet filter water separator; see
Obstructed gun impingement ports or
filters
Leaking pump throat
Leak between pump and gun
Spray gun is leaking on one side or
plugged on the other side
Inlet ball check not sealing
Inlet check seat o-ring not sealing
Piston check ball not sealing
Piston packing not sealing
Loose piston stud in pump
Bad inside sleeve seal
A side gauge is low
B side gauge is low
A side gauge is low
B side gauge is low
Troubleshooting
SOLUTION
Increase inlet air pressure
Increase air compressor size to meet
flow requirements
Remove airline quick disconnects
Use 3/8 in. (0.95 cm) ID or larger air
supply hose. Use 1/2 in. (12.7 mm) if
longer than 25 ft (7.6 m).
page 26. Stop spraying while ice
melts.
Flush and clean gun; see gun manual
Repair pump; see 309577
Check fluid tubes, heater, and hoses
Pressure Relief/Spray valve leaking
back to supply
Clean and repair spray gun
Clean or replace; see 309577
Repair pump; see 309577
Repair pump; see 309577
Repair pump; see 309577
Repair pump; see 309577
Repair o-ring; see 309577
B side restriction downstream of
gauge. Check gun check valve
screen, mix module, or mix manifold
restrictor.
A side impingement port is worn.
B side material supply problem.
Check B side inlet strainer and pump
intake valve.
A side material supply problem.
Check A side inlet strainer and pump
intake valve.
A side restriction downstream of
gauge. Check gun check valve
screen, mix module, or mix manifold
restrictor.
B side impingement port is worn.
17