Troubleshooting
3A4442F
25
Pump output is low
Pump rod damage
Repair pump. See pump manual.
Low stall pressure
Turn pressure knob fully clockwise.
Make sure pressure control knob is
properly installed to allow full
clockwise position. If problem
persists, replace pressure
transducer.
Piston packings are worn or
damaged
Replace packings; see pump
manual.
O-ring in elbow is worn or damaged Replace o-ring.
Intake or piston valve ball is packed
with material or worn
Clean piston or intake valve, or
replace balls; see pump manual.
Pressure setting is too low
Increase pressure; see pump
manual.
Large pressure drop in hose with
heavy materials
Use larger diameter hose and/or
reduce overall length of hose.
Check to see if Amp switch (10/16)
or (15/20) is on low setting. Make
sure circuit is able to provide high
setting.
Switch to 16A or 20A setting.
Change to circuit that provides 16A
or 20A. Change to less loaded
circuit.
Motor runs but pump does not
stroke
Connecting rod assembly
damaged; see pump manual.
Replace connecting rod assembly;
see pump manual.
Gears or drive housing damaged.
Inspect drive housing assembly
and gears for damage and replace
if necessary; see pump manual.
Excessive material leakage into
throat packing nut
Throat packing nut is loose
Remove throat packing nut spacer.
Tighten throat packing nut just
enough to stop leakage.
Throat packings are worn or
damaged
Replace packings; see pump
manual.
Displacement rod is worn or
damaged
Replace rod; see pump manual.
Fluid is spitting from gun
Air in pump or hose
Check and tighten all fluid
connections. Cycle pump as slowly
as possible during priming.
Tip is partially clogged
Clear tip; see operation manual.
Fluid supply is low or empty
Refill fluid supply. Prime pump; see
pump manual. Check fluid supply
often to prevent running pump dry.
Problem
Cause
Solution