Graco 222-340, Instructions-Parts List Manual

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10
307-922
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 spraying.
1. Turn the ON/OFF switch to OFF.
2. Unplug the power supply cord.
3. Trigger the spray 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.
Material too thick Thin; try pouring material into suction tube.
Outlet valve spring worn or damaged Pour material into suction tube and try to prime sys-
tem. If it doesn’t prime in one minute, replace the out-
let spring. See Outlet Valve, page 14.
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 14.
É
Ç
Ç É
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 16.
Fuse burned out. Replace. See page 13. If it burns out again soon, re-
turn the system to an authorized repair agency for re-
pair.
Low or no material flow Clogged spray tip Clean thoroughly after each use. See Flushing on
page 8.
Loose inlet hose nut Tighten.
Worn or damaged priming valve Replace. See page 15.
Priming valve is open Close.
Material too thick Thin: Follow manufacturer‘s recommendations.
Damaged pressure switch Replace. See page 14.
Worn inlet and/or outlet valve Replace. See page 14.
Pump runs after spray valve trigger is released Worn or damaged pressure switch Replace. See page 14.
Worn or damaged inlet valve Replace. See page 14.
Worn or damaged outlet valve Replace. See page 14.
Worn or damaged priming valve Replace. See page 15.
Worn spray valve packings or needle Repair. See page 12.