Graco Inc. Series E - Manual (Page 8)

8
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TROUBLESHOOTING GUIDE
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.
WARNING CAUTION
Thoroughly flush the system after each use to re-
duce down time and costly repair bills.
NOTE: If you are not able to determine the cause of the
problem, or the problem and solution is not dis-
cussed in this chart, return the system to an au-
thorized service agencyfor repair.
PROBLEM CAUSE SOLUTION
Pump will not prime or primes slowly Clogged suction tube strainer Clean.
Paint too thick Thin; try pouring paint into suction tube;
use 3/8 in. ID hose if necessary.
Outlet valve spring worn 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.
Inlet valve stuck or damaged. 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.
Loose inlet hose nut Tighten.
Pump wil not start Power cord unplugged Plug in.
ON/OFF switch turned off Turn on.
Damaged motor Replace. See page 13.
Fuse burned out. Replace. See page 10. If it burns out again
quickly, return the system for repair.
Low paint flow or no paint flow. Clogged roller valve, diffuser, roller frame,
roller valve or hose Clean thoroughly after each use. See page
6.
Using more than 7.6 m (25 ft) of
1/4 in. ID hose Use up to 30 m (100 ft) of 3/8 in. ID hose.
See CAUTION on page 17.
Loose inlet hose nut Tighten.
Worn priming valve Replace. See page 12.
Priming valve is open Close.
Paint too thick Thin.
Damaged pressure switch Replace. See page 11.
Worn inlet and/or outlet valve Replace. See page 11.
Pump runs after roller valve trigger is
released. Worn pressure switch Replace. See page 11.
Worn inlet valve Replace. See page 11.
Worn priming valve Replace. See page 12.
Worn roller valve packings or needle Repair. See page 9.
DEPRESS LIGHTLY.
POUR IN 1 TEASPOON
MINERAL SPIRITS