Graco 220-240 Instructions And Parts List page 8

WARNING
Pressure Relief Procedure
To reduce the risk of serious bodily injury, including
injury from moving parts or electric shock, always
follow this procedure whenever you shut off the sys-
tem, when checking or servicing any part of the sys-
tem, and whenever you stop painting.
1. Turn the ON/OFF switch to OFF.
2. Unplug the power supply cord.
3. Trigger the roller valve to relieve pressure.
If you suspect that pressure is not fully relieved after
following the steps above, open the priming valve 2
turns counterclockwise.
PROBLEM
Pump will not prime or primes slowly
Pump wil not start
Low paint flow or no paint flow.
Pump runs after roller valve trigger is
released.
307–760
TROUBLESHOOTING GUIDE
NOTE: If you are not able to determine the cause of the
CAUSE
Clogged suction tube strainer
Paint too thick
Outlet valve spring worn
Inlet valve stuck or damaged.
Loose inlet hose nut
Power cord unplugged
ON/OFF switch turned off
Damaged motor
Fuse burned out.
Clogged roller valve, diffuser, roller frame,
roller valve or hose
Using more than 7.6 m (25 ft) of
1/4 in. ID hose
Loose inlet hose nut
Worn priming valve
Priming valve is open
Paint too thick
Damaged pressure switch
Worn inlet and/or outlet valve
Worn pressure switch
Worn inlet valve
Worn priming valve
Worn roller valve packings or needle
CAUTION
Thoroughly flush the system after each use to re-
duce down time and costly repair bills.
problem, or the problem and solution is not dis-
cussed in this chart, return the system to an au-
thorized service agencyfor repair.
SOLUTION
Clean.
Thin; try pouring paint into suction tube;
use 3/8 in. ID hose if necessary.
Pour paint into suction tube and try to prime
system. If it doesn't prime in one minute, re-
place the outlet valve spring. See page 11.
Depress inlet valve gently and pour in
about 1 teaspoon mineral spirits. Try to
prime pump. Replace inlet valve if neces-
sary. See page 10.
Tighten.
Plug in.
Turn on.
Replace. See page 13.
Replace. See page 10. If it burns out again
quickly, return the system for repair.
Clean thoroughly after each use. See page
6.
Use up to 30 m (100 ft) of 3/8 in. ID hose.
See CAUTION on page 17.
Tighten.
Replace. See page 12.
Close.
Thin.
Replace. See page 11.
Replace. See page 11.
Replace. See page 11.
Replace. See page 11.
Replace. See page 12.
Repair. See page 9.
DEPRESS LIGHTLY.
POUR IN 1 TEASPOON
MINERAL SPIRITS