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