Trouble Shooting
19
TROUBLE SHOOTING
Pump does not prime
•
No liquid in tank or not covering suction
inlet.
•
Suction filter blocked.
•
Suction filter stop valve closed.
•
Suction filter bowl loose or missing O-
ring.
•
Suction line loose allowing pump to suck
air.
•
Pressure regulator too tight to allow
bypass.
•
Pump valve springs broken or valves
worn.
Pump does not reach correct
pressure
•
Pump not operating at full 540 rpm.
•
Suction filter blocked.
•
Suction filter stop valve partly closed
•
Pressure
regulator
not
correctly
adjusted
•
Pressure regulator valve and seats
worn.
•
Pressure gauge faulty
•
Pump diaphragms ruptured (pump oil
grey or milky).
•
Worn nozzles or capacity of nozzles
greater than capacity of the pump.
•
Worn pump inlet / outlet valves
Pump and hoses vibrating.
•
Pump
surge
chamber
pressure
incorrectly adjusted or surge diaphragm
ruptured.
•
Air entering the suction line through
loose or damaged fittings.
•
Pump valves or valve springs worn or
damaged.
•
Worn nozzles or capacity of nozzles
greater than capacity of the pump.
•
Air trapped in filter or suction lines.
Water in oil (oil is a whitish grey
colour)
•
Broken diaphragms.
Pressure regulator valve vibrates
•
Worn adjustment plate seat
Pressure regulator leaking water
•
Loose screws
•
Damaged diaphragm in regulator
