Graco FinishPro II 295 Mode D'emploi page 53

Problem
Low Fluid Output
333114D
What To Check
(If check is OK, go to next check)
1. Worn or clogged spray tip.
2. Verify pump does not continue to
stroke when gun trigger is released.
3. Prime valve leaking.
4. Suction hose connections.
5. Electric supply with volt meter. Meter
must read 105-130 Vac for 110-120
Vac models and 210-255 for 240 Vac
models. Low voltages reduce
sprayer performance.
6. Extension cord size and length.
7. Leads from motor to circuit board for
damaged or loose wire connectors.
Inspect wiring insulation and termi-
nals for signs of overheating.
8. Worn motor brushes which must be
1/4 in. (6 mm) minimum.
9. Motor brushes binding in brush hold-
ers.
10. Low stall pressure. Turn pressure
control knob fully clockwise.
11. Motor armature for shorts by using
an armature tester (growler) or per-
form spin test, page 83.
12. Pump is primed.
13. Inlet and outlet balls are not stuck.
What To Do
(When check is not OK, refer to this column)
Relieve pressure, page 30. Replace or clean tip.
Refer to gun instruction manual, 313347.
Service Pump, page 87.
Relieve pressure, page 30. Then repair Prime
Valve, page 90.
Tighten any loose connections. Check o-rings on
suction hose tube.
Reset building circuit breaker; replace building fuse.
Repair electrical outlet or try another outlet.
Replace with a correct, grounded extension cord,
page 27.
Be sure male terminal pins are centered and firmly
connected to female terminals. Replace any loose
terminals or damaged wiring. Securely reconnect
terminals.
Replace Motor, page 49.
Clean brush holders. Remove carbon dust by using
compressed air to blow out brush dust.
Replace Pressure Control Assembly, page 90.
Replace Motor, page 49.
Prime pump, page 34.
Inlet: Remove suction tube and place pencil into inlet
housing to dislodge ball and allow proper priming.
Outlet: Insert screwdriver in slot and remove
Easy-Access door, page 26. Unscrew outlet valve
with a 3/4 in. socket. Remove and clean assembly.
Basic Troubleshooting
53