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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
44
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.
2.
Air connections may be loose.
3.
Damaged (leaking) air supply hose.
4.
Air intake filter clogged.
What To Do
(When check is not OK, refer to this column)
Close or replace Prime Valve, page 79.
Refill and reprime pump.
Remove and clean, then reinstall.
Tighten nut. Check o-rings on swivel tube.
Clean and repair pump, page 77. Strain paint before
using to remove particles that could clog pump.
Replace Pump and Packing module, page 79.
Replace Pump and Packing module, page 79.
Inspect Drive Housing Assembly and gears for
damage and replace if necessary, page 79.
Move sprayer to shaded, cooler area if possible.
Replace Motor, page 39.
Turn air adjustment valve counter-clockwise to open.
Slide air ON/OFF up to open.
Check all connections for leaking air.
Replace air supply hose.
Clean or replace air intake filter.
Basic Troubleshooting
313860A
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