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Problem
Pump operates, but output is low
on downstroke.
Erratic or accelerated pump
speed.
Fluid being pumped is visible in
the packing nut wet-cup.
Bad spray pattern.
3A0732U
Cause
Held open or worn ball check valves
or piston packings.
Exhausted fluid supply.
Held open or worn ball check valves
or packings.
Worn throat packings.
Clean or repair spray gun or tip.
Troubleshooting
Solution
Clear valve; replace packings. See
page 17.
Refill and prime.
Clear valve, replace packings. See
page 17.
Tighten packing nut.
Replace throat packings. See page
17.
See manual 3A8099.
15
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