Troubleshooting
16
310622C
Troubleshooting
•
Relieve the pressure before checking or servicing
the equipment.
•
Check all possible problems and causes before dis-
assembling the pump.
WARNING
To reduce the risk of serious injury, whenever you are
instructed to relieve pressure, always follow the
Pres-
sure Relief Procedure
on page 13.
PROBLEM
CAUSE
SOLUTION
Pump cycles at stall or fails to hold
pressure at stall.
Worn check valve balls (41), seats
(33) or gaskets (40).
Replace. See page 22.
Pump will not cycle, or cycles once
and stops.
Air valve is stuck or dirty.
Disassemble and clean air valve.
See page 18. Use filtered air.
Check valve ball (41) severely worn
and wedged in seat (33) or mani-
fold.
Replace ball and seat. See page
22.
Check valve ball (41) is wedged
into seat (33), due to overpressur-
ization.
Follow
Pressure Relief Proce-
dure
, page 13. Disassemble ball
check assembly and inspect for
damage, see page 22.
Dispensing valve clogged.
Relieve pressure and clear valve.
Leak detector has activated a shut
down solenoid
Investigate failure and rest leak
detector
Pump operates erratically.
Clogged suction line.
Inspect; clear.
Sticky or leaking balls (41).
Clean or replace. See page 22.
Diaphragm ruptured.
Replace. See page 23.
Restricted exhaust.
Remove restriction.
Air bubbles in fluid.
Suction line is loose.
Tighten.
Diaphragm ruptured.
Replace. See pages 23.
Loose inlet manifold, damaged seal
between manifold and seat, dam-
aged gaskets.
Tighten manifold clamps or replace
seats or gaskets. See page 22.
