Troubleshooting - Graco 17B484 Operation

Troubleshooting

PROBLEM
Gas engine pulls hard (will not start). Hydraulic pressure is too high.
Gas engine does not start.
Gas engine doesn't work properly.
Gas engine operates, but
displacement pump doesn't operate.
Displacement pump operates, but
output is low on upstroke.
Displacement pump operates but
output is low on downstroke and/or
on both strokes.
Paint leaks and runs over side of
wetcup.
Excessive leakage around hydraulic
motor piston rod wiper.
332156E
CAUSE
Switch OFF, low oil, no gasoline, or
dead battery.
Faulty engine.
Pump valve is OFF.
Pressure setting too low.
Displacement pump outlet filter
(if used) is dirty or clogged.
Tip or tip filter (if used) is clogged.
Hydraulic fluid too low.
Belt worn, broken or off.
Hydraulic pump worn or damaged.
Dried paint seized paint pump rod.
Hydraulic motor not shifting.
Piston ball check not seating
properly.
Piston packings worn or damaged.
Piston packings worn or damaged.
Intake valve ball check not seating
properly.
Suction tube air leak.
Loose wet-cup.
Throat packings worn or damaged.
Piston rod seal worn or damaged.
Troubleshooting
SOLUTION
Turn hydraulic pressure knob
counterclockwise to lowest setting.
Consult engine manual, supplied.
Replace battery if necessary.
Consult engine manual, supplied.
Set pump valve ON.
Increase pressure.
Clean the filter.
Remove tip and/or filter and clean.
Shut off sprayer. Add fluid*
Replace. See manual 332157.
Bring sprayer to Graco distributor for
repair.
Service pump. See manuals 308043,
311825, 311762.
Set pump valve OFF. Turn pressure
down. Turn engine OFF. Pry rod up
or down until hydraulic motor shifts.
See manual 332157.
Service piston ball check.
See manual 308043, 311825,
311762.
Replace packings. See manuals
308043, 311825, 311762.
Tighten packing nut or replace
packings. See manuals 308043,
311825, 311762.
Service intake valve ball check.
See manuals 308043, 311825,
311762.
Repair or replace suction tube.
Tighten wet-cup enough to stop
leakage.
Replace packings.
See manuals 308043, 311825,
311762.
Replace these parts.
See manuals 308043, 311825,
311762.
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