Before inspecting or replacing the diaphragm dis-
connect the electrical supply. The user must then
remove the pump head clamping rings, this is done
by unscrewing the clamping screw.
This will release the pump head, and allow easy
access to the valves & diaphragm. The diaphragm
and valves should be checked for any excessive
wear, damage or cracks, and should be replaced if
necessary. If the diaphragm needs to be replaced,
undo the nut in the centre of the diaphragm and
remove the diaphragm plate & diaphragm.
Note:
The centre pin may be in one of several posi-
tions, this will not affect replacement of the
diaphragm). When replacing the diaphragm this
can be fitted either cup up or down. Replace
clamping plate making sure the rounded edge
faces the diaphragm, also ensure that the outer
sealing edge of the diaphragm is located securely
in the grooves between the body & gear housing
(failure to do this will cause the pump NOT to
prime). Refit clamping rings and tighten screw.
The electric motor runs but no water is pumped ?
Check:
a) that inlet hose connection is airtight, free from
blockages, and does not collapse.
b) that the shower/sink drain is not clogged.
c) that the valves in the pump are not blocked & are
seating properly in the pump head.
d) that the diaphragm has not split - replace if
damaged.
The motor will not operate ?
Check:
a) the isolator switch is on.
b) there is 12/24 volts from the battery.
c) the in-line fuse & ensure all electrical connections
are tight and free from corrosion. (If fuse has blown
check for debris in pump head and clean out if
necessary. replace fuse and run pump - see previ-
ous page).
Spares Kit Part No: AK1550
Any questions contact our service desk -
Email: support@whalepumps.com.
4
Fault Finding
Service Kits
Maintenance
Typical Installation as a High Capacity
Grey Waste Pump
Typical installation as a Remote
Mounting bilge pump
Gulper 320
Gulper 320
Galley
Sink
Shower tray
Shower tray
Dishwasher
Dimensional drawing of Gulper 320
280 mm
63 mm
156 mm
112 mm
198 mm
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