Instruction manual

12
13
PROBLEM CAUSE SOLUTION
There is spitting from the gun. The uid supply is low or empty
Air entrapped in the uid pump or hose
• Rell the supply container.
• Check for loose connections ont he siphon
assembly, tighten, then reprime pump.
Paint leaks into the wet cup The packing nut/wet cup is loose.
The upper packings are worn or
damaged.
Worn piston rod.
• Tighten just enough to stop leakage.
• Replace the packings. See pages 16-17.
• Replace piston rod.
The engine operates, but the
paint pump doesn’t cycle.
The pressure setting is too low.
The displacement pump is seized.
• Increase the pressure. See page 7.
• Service the pump. See page 14-17.
The displacement pump
operates, but paint pressure
is too low or none.
The pressure setting is too low.
The tip or gun lter is clogged.
The tip is worn.
The uid displacement pump lter is
clogged
There is a large pressure drop in the
uid hose.
• Increase the pressure. See page 7.
• Remove the tip and/or lter and clean them.
• Replace tip.
• Clean the lter.
• Use a larger diameter hose.
The displacement pump
operates, but the output is
too low on the downstroke or
both strokes.
The inlet valve ball is not seating
properly.
• Service the inlet valve. See page 15.
The displacement pump
operates, but the output is too
low on the upstroke.
The outlet valve ball is not seating
properly.
The lower packings are worn or
damaged.
• Service the outlet valve. See page 15.
• Replace the packings. See page 16-17.
Engine stops. • Refer to engine manual.
FIELD TROUBLESHOOTING