7
TROUBLESHOOTING CHART
PROBLEM
CAUSE
SOLUTION
Pump does not operate.
Restricted air line, clogged air passages,
Clear; see
TECHNICAL DATA
on page 18.
or inadequate air supply.
Main air valve is closed.
Open.
Air regulator malfunction.
Replace.
Dirty or worn air motor parts; air motor leak.
Clean and overhaul air motor. See page 8.
Obstructed fluid hose or dispensing valve;
Clear*; use hose with larger ID.
fluid hose ID is too small.
Fluid is too heavy; pump is laboring.
Increase pump air regulator pressure.
Fluid dried on the fluid piston.
Clean. See page 8.
Pump operates, but in
Dirty or worn air motor parts; air motor leak.
Clean and overhaul air motor. See page 8.
small strokes.
Pump operates, but
Restricted air line, clogged air passages,
Clear; see
TECHNICAL DATA
on page 18.
output is low.
or inadequate air supply.
Dirty or worn air motor parts; air motor leak.
Clean and overhaul air motor. See page 8.
Obstructed fluid hose or dispensing valve;
Clear*; use hose with larger ID.
fluid hose ID is too small.
Fluid is too heavy; pump is laboring.
Increase pump air regulator pressure.
Worn intake valve.
Service. See page 8.
Pump running too fast.
Exhausted fluid supply.
Replace or refill can.
Worn intake valve.
Service. See page 8.
Dirty or worn air motor parts; air motor leak.
Clean and overhaul air motor. See page 8.
Ram does not move up
Restricted air line, clogged air passages,
Clear; see
TECHNICAL DATA
on page 18.
or down.
or inadequate air supply.
Main air valve is closed.
Open.
Air regulator malfunction.
Replace.
Wiper plate lodged in container.
Use air assist button.
Pump doesn’t prime.
Fluid is too heavy.
Open pump bleeder valve.
Wiper plate leaks.
Ram pressure is too high.
Reduce air pressure to ram.
Wiper plate ring is worn.
Replace.
Leakage past throat packing.
Worn u–cup packing.
Replace (wet–cup is not adjustable).
*
To determine if the fluid hose or gun is obstructed, follow the
Pressure Relief Procedure Warning
below. Disconnect the fluid hose and place a
container at the pump fluid outlet to catch any fluid. Turn on the air just enough to start the pump (about 1.4–2.8 bar [20–40 psi]). If the pump starts
when the air is turned on, the obstruction is in the fluid hose or gun.
Pressure Relief Procedure
To reduce the risk of serious bodily injury , including fluid
splashing in the eyes or on the skin, or injury from moving
parts, always follow this procedure whenever you shut off the
pump, when checking or servicing any part of the dispensing
system, when installing, cleaning or changing nozzles, and
whenever you stop dispensing.
1. Shut off the dispensing valve.
2. Shut off the bleed–type master air valve (required in your
system), on the main air line.
3. Close the bleed–type master air valve (supplied with your
pump).
4. Trigger the dispensing valve to relieve pressure.
If you suspect that the dispensing valve, nozzle or hose is
completely clogged, or that pressure has not been fully re-
lieved after following the steps above, VERY SLOWLY open
the pump bleeder valve, having a container ready to catch
the drainage. Leave the pump bleeder valve open until you
are ready to dispense again. VER Y SLOWLY loosen the
hose end coupling and relieve pressure gradually
, then
loosen completely. Now clear the nozzle or hose.
WARNING
