Table of Contents
Advertisement
.(
I
.
.
!
~
TROUBLESHOOTING GUIDE
PROBLEM
Displacement pump outpul
low on upstroke
low on downstroke or bott
Displacement pump outpu
strokes
Paint leaks into wetcup
Low fluid delivery
Spitting from gun
CAUSE
~~
Pump inlet screen clogged
Piston ball check not seating
Piston packings worn or damaged
Displacement pump sleeve gasket
worn or damaged
Pump inlet screen clogged
Piston packings worn or damaged
properly
Intake valve ball check not seating
Engine RPM too low
Clutch worn or damaaed
~~~~~
Loose wet-cup
Throat packings worn or damaged
Displacement rod worn or
damaged
Pump inlet screen clogged
Pressure setting too low
Engine RPM too low
Dirty outlet filter, tip filter or tip
Large pressure drop in hose
Air in fluid pump or hose
Tip partially clogged
Fluid supply is low or empty
~
SOLUTION
Clean.
Service piston ball check.
Replace packings.
Replace.
Clean.
Replace packings.
Clean and service.
Increase throttle setting. See Startup,
Step 17, page 12.
Replace. See page 28.
Tighten just enough to stop leakage.
Replace packings. See 307-793.
Replace. See 307-793.
Clean.
Increase pressure. See Startup, Step
17, page 12.
Increase throttle setting. See Startup,
Step 17, page 12.
Clean,
Use larger diameter hose.
Check for. loose connections at intake
and tighten. Then prime the pump.
See Startup, page
12.
Clear.
Refill and reprime the pump. See
often to prevent running dry.
Startup, page 12. Check fluid supply
Advertisement
Table of Contents
