0800 833 538
www.bapumpsandsprayers.com
Trouble Shooting
(Diaphragm Pumps)
- Check valves
- Check hose
- Check nozzles
- Clean strainer
TROUBLES
CAUSES
REMEDY
The pump
doesn’t reach
the required
pressure
- Valves have worn seats
- Suction hose with air
pockets or irregular elbows
- Worn nozzles or with wrong
diameter
- Clogged strainer
- Start pump with the gun open, to
evacuate the air and commutate
-Clean or change valves
The pressure
gauge
fluctuates
- Pump is sucking air, or air
hasn’t been evacuated
completely
-Valves blocked
- Check pressure in pulsatio-damper
The liquid flow
is irregular
- The air in the
pulsation-damper is
incorrectly set
- Top up with oil to correct level (halfway
up the sump), when pump is operating
Output drops
and the pump is
noisy
- Oil level is too low
- Drain the pumps of oil. Dismantle the
head and change diaphragms. Fill to the
correct oil level
Oil comes out of
the discharge
pipe
- One or more diaphragms are
ruptured
- Drain the pumps of oil. Dismantle the
head and change diaphragms. Fill to the
correct oil level
Oil is
changing colour
into white
- Diaphragm failures. Stop
pump immediately
