Graco FinishPro 290 Operation Manual page 38

Problem
Motor runs and pump strokes
Motor runs but pump does not
stroke
Motor is hot and runs
intermittently
Low air output at gun
Low air output at gun
38
What To Check
(If check is OK, go to next check)
1. Prime Valve is open or leaking.
2. Paint supply.
3. Intake strainer clogged.
4. Suction tube leaking air.
5. Intake valve ball and outlet
ball are seating properly not worn.
6. Leaking around throat packing
nut which may indicate worn
or damaged packings.
7. Pump rod damaged.
8. Gears or drive housing.
1. Be sure ambient temperature where
sprayer is located is not more
than 115°F (46°C) and sprayer
is not located in direct sun.
2. Motor has burned windings
indicated by removing positive
(red) brush and seeing burned
adjacent commutator bars.
1. Air valves at gun may be closed. Turn air adjustment valve counter-clockwise to open.
2. Air connections may be loose.
3. Damaged (leaking) air supply
hose.
4. Air intake filter clogged.
基本故障排除
Basic Troubleshooting /
What To Do
(When check is not OK, refer to this column)
Close or replace Prime Valve, page 60.
Refill and reprime pump.
Remove and clean, then reinstall.
Tighten nut. Check o-rings on swivel tube.
Clean and repair pump, page 58. Strain paint before
using to remove particles that could clog pump.
Replace Pump and Packing module, page 60.
Replace Pump and Packing module, page 60.
Inspect Drive Housing Assembly and gears
for damage and replace if necessary, page 60.
Move sprayer to shaded, cooler area if possible.
Replace Motor, page 33.
Slide air ON/OFF up to open.
Check all connections for leaking air.
Replace air supply hose.
Clean or replace air intake filter.
기본적인 문제 해결
/
313797C