Graco 218-938, Instructions And Parts List

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10
307-730
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 agency for repair.
PROBLEM CAUSE SOLUTION
Pump will not prime, or takes long time to prime Clogged suction tube filter Clean.
Paint too thick Thin; try pouring paint into suction tube.
Outlet valve spring worn or damaged Pour paint into suction tube and try to prime system.
If it doesn’t prime in one minute, replace the outlet
spring. See Outlet Valve, page 13.
Inlet valve stuck or damaged Depress valve gently and pour in about 1 teaspoon
mineral spirits. Try to prime pump. Replace valve if
necessary. See Inlet Valve, page 13.
É
É
Ç
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Ç
Ç
0289
DEPRESS LIGHTLY.
POUR IN 1 TEASPOON
MINERAL SPIRITS.
Loose inlet hose nut Tighten
Pump will not start Power cord unplugged Plug in.
ON/OFF switch turned off Turn on.
Damaged motor Replace. See page 15.
Fuse burned out. Replace. See page 12. If it burns out again soon, re-
turn the system to an authorized repair agency for re-
pair.
Low or no paint flow Clogged roller cover , diffuser, roller frame,
roller valve, or hose
Clean thoroughly after each use. See Flushing on
page 8.
Using more than 25 ft. (7.6 m) of 1/4” ID hose Use up to 100 ft. (30 m) of 3/8” ID hose. See CAU-
TION on page 2.
Loose inlet hose nut Tighten.
Worn or damaged priming valve Replace. See page 14.
Priming valve is open Close.
Paint too thick Thin: Follow manufacturer‘s recommendations.
Damaged pressure switch Replace. See page 13.
Worn inlet and/or outlet valve Replace. See page 13.
Pump runs after roller valve trigger is released Worn or damaged pressure switch Replace. See page 13.
Worn or damaged inlet valve Replace. See page 13.
Worn or damaged outlet valve Replace. See page 13.
Worn or damaged priming valve Replace. See page 14.
Worn roller valve packings or needle Repair. See page 11.