Graco GM 5000 User Manual

307-847 17
PROBLEM
CAUSE SOLUTION
Displacement pump output
low on upstroke
Pump inlet screen clogged Clean.
Piston ball check not seating Service piston ball check. See page 31.
Piston packings worn or damaged Replace packings. See page 31.
Sleeve gasket in displacement
pump worn or damaged
Replace. See page 31.
Displacement pump output
low on downstroke or both
strokes
Pump inlet screen clogged Clean.
Piston packings worn or damaged Replace packings. See page 31.
Intake valve ball check not seating
properly
Clean and service. See page 31.
Engine RPM too low Increase throttle setting. See Startup,
Step 1 1, page 12.
Clutch worn or damaged Replace. See page 22.
Paint leaks into wet–cup Loose wet–cup T ighten just enough to stop leakage.
Throat packings worn or damaged Replace packings. See page 31.
Displacement rod worn or damaged Replace rod. See page 31.
Low fluid delivery Pump inlet screen clogged. Clean.
Pressure setting too low Increase pressure. See Startup,
Step 1 1, page 12.
Engine RPM too low Increase throttle setting. See Startup,
Step 1 1, page 12.
Dirty outlet filter , tip filter or tip Clean.
Large pressure drop in hose Use larger diameter hose.
Spitting from gun Air in fluid pump or hose Check for loose connections at pump in -
take and tighten. Then prime the pump.
See page 12.
T ip partially clogged Clear.
Fluid supply is low or empty Refill and prime the pump. See Startup,
page 12. Check fluid supply often to pre -
vent running the pump dry .
Pump is dif ficult to prime Air leak Check all hose connections and tighten as
needed.
Reduce RPM and cycle pump as slowly
as possible during priming.
Intake valve is leaking Shut of f pump and relieve pressure. Dis -
assemble and clean intake valve. Be sure
ball seat is not nicked or worn and that the
ball seats well. Reassemble.
W orn packings Repack the pump. See page 31.
Fluid is too thick Thin fluid according to supplier ’s
recommendations.

Graco GM 5000 Specifications

General

Brand	Graco
Model	GM 5000
Category	Paint Sprayer
Language	English