Graco Mark VII Paint Sprayer User Manual


 
Troubleshooting
26 332916C
Pump is difficult to prime
Air in pump or hose Check and tighten all fluid connections. Cycle
pump as slowly as possible during priming.
Intake valve is leaking Clean intake valve. Be sure ball seat is not
nicked or worn and that ball seats well. Reas-
semble valve.
Pump packings are worn Replace pump packings; see pump manual.
Paint is too thick Thin the paint according to supplier recommen-
dations.
No display, sprayer
operates
Display is damaged or has bad con-
nection
Check connections. Replace display.
TYPE OF PROBLEM
WHAT TO CHECK
If check is OK, go to next check
WHAT TO DO
When check is not OK, refer to this column