Troubleshooting - Graco DutyMax DH230 HD Operation, Parts

Troubleshooting

Problem
Internal combustion engine
pulls hard (won't start)
Gasoline engine does not start
Gasoline engine does not work
properly
Diesel engine does not start
Diesel engine does not work
properly
Internal combustion engine
operates, but displacement
pump does not operate
Displacement pump operates,
but output is low on upstroke
334606J
Cause
Hydraulic pressure is too high
Switch OFF, low oil, no gasoline
Fuel shut off valve closed
Faulty engine
Elevation
No fuel
Incorrect injection timing, rings
worn or sticking.
Faulty engine
Poor fuel quality
Hydraulic 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 or 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
Troubleshooting
Solution
Turn hydraulic pressure knob
counterclockwise to lowest
setting
Consult engine manual
Open fuel shut off valve
Consult engine manual
Refer to Engine Repair Kit, 4.0
hp - 288678 / 5.5 hp - 248943 /
6/5 hp - 248944 / 9.0 hp -
248945
Consult engine manuals
Consult engine manuals
Drain fuel tank and replace fuel
with good clean fuel
Set hydraulic pump valve ON
Increase pressure, page 18
Clean the filter
Remove tip and/or filter and
clean
Shut off sprayer. Add fluid*. See
page 16
Replace.
Bring sprayer to Graco
distributor for repair
Service pump. See manual
334654
Set pump valve OFF. Turn
pressure down. Turn engine
OFF. Pry rod up or down until
hydraulic motor shifts.
Service piston ball check. See
manual 334654
Replace packings. See manual
334654
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