Graco 288776, Instructions - Parts Manual

Page: 6 / 10

Maintenance
6 312111A
Maintenance
1. After relieving cup pressure and turning
cup pressure regulator to the full “off”
position (counter-clockwise), open cup lid
by turning counter-clockwise.
2. Pour out any remaining material and add
a compatible solvent.
3. Repeat steps 3, 4, and 6 in Operation on
page 5 and spray until clean solvent
appears. Cup and gun material passages
should be clean now.
4. Depressurize cup (See Operation, step
1) and empty remaining solvent from cup
and wipe clean with a solvent soaked
cloth.
Troubleshooting
Paint can erupt from the cup due to rapid
depressurization. Never open the cup prior to
turning cup pressure regulator knob to the full
“off” position (counter-clockwise) and reliev-
ing cup pressure by opening (counter-clock-
wise) manual pressure relief valve.
CAUTION
Never clean your Model 288776 in a gun
washer. The automatic pressure relief valve,
regulator body, and gauge will be damaged
by use in a gun washer. The canister only
can be cleaned in a gun washer.
Problem Cause Solution
Excess pressure in cup. Leak at regulator valve assem-
bly.
Gauge registering incorrectly.
Automatic relief valve setting too
high.
Valve spring broken or distorted.
Diaphragm damaged.
Replace.
Replace.
Replace.
Replace.
Replace.
Insufficient pressure in cup. Check valve stuck shut.
Automatic relief valve setting too
low.
Gauge registering incorrectly.
Leak at cup lid threads.
Manual pressure relief valve par-
tially open.
Clean or Replace.
Replace.
Replace.
Tighten cup or replace gasket.
Tighten.