AIRLESSCO HSS9950, Operation - Repair - Parts

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Troubleshooting
26 3A4102C
Troubleshooting
Problem Cause Solution
Internal combustion engine
pulls hard (won’t start)
Hydraulic pressure is too high Turn hydraulic pressure knob
counterclockwise to lowest
setting
Gasoline engine does not start Switch OFF, low oil, no gasoline Consult engine manual
Fuel shut off valve closed Open fuel shut off valve
Gasoline engine does not work
properly
Faulty engine Consult engine manual
Internal combustion engine
operates, but displacement
pump does not operate
Hydraulic pump valve is OFF Set hydraulic pump valve ON
Pressure setting too low Increase pressure
Displacement pump outlet filter
(if used) is dirty or clogged
Clean the filter
Tip or tip filter (if used) is
clogged
Remove tip and/or filter and
clean
Hydraulic fluid too low Shut off sprayer. Add fluid*
Belt worn or broken or off Replace.
Hydraulic pump worn or
damaged
Bring sprayer to distributor for
repair
Dried paint seized paint pump
rod
Service pump. See pump
manual.
Hydraulic motor not shifting Set pump valve OFF. Turn
pressure down. Turn engine
OFF. Pry rod up or down until
hydraulic motor shifts.
Displacement pump operates,
but output is low on upstroke
Piston ball check not seating
properly
Service piston ball check. See
pump manual.
Piston packings worn or
damaged
Replace packings. See pump
manual.
Displacement pump operates,
but output is low on down stroke
and/or on both strokes
Piston packings worn or
damaged
Tighten packing nut or replace
packings. See pump manual.
Intake valve ball check not
seating properly
Service intake valve ball check.
See pump manual.
Hydraulic oil filter is dirty Replace filter.
Paint leaks and runs over side of
wet cup
Loose wet cup Tighten wet cup enough to stop
leakage
Throat packings worn or
damaged
Replace packings. See pump
manual.