517794B
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18 SPECIALISED SERVICE PROCEDURES
18.1
Pump Housing - Stripped Bolt Procedure
On the pump housing there are two bolt hole
positions. These positions are used when the
housing is assembled to the base of the outer
bowl in the factory.
On servicing, should either or both bolts strip in
the outer bowl, the other ‘blanked off’ holes can
be used.
It is important to drill the two holes either side of
the centre hole, otherwise the pump housing will
not completely seal to the outer bowl.
(a) Follow procedures for removal of pump
housing (refer to Section 17.13).
(b) Place the pump housing upside down on a
block of timber or other such suitable
surface. Using a sharp ¼” (7mm) drill bit,
drill both of the blanked off holes either side
of the centre hole.
(c) Place the pump housing on the outer bowl.
Using the two new positions, screw the
pump housing to the outer bowl. Ensure the
bolts are tightened to 18 in/lbs (2Nm).
Note: It is essential that if using the alternate
screw hole positions, the two bolts are used,
otherwise the pump housing will not seat
correctly and a leak will develop.
18.2
Blocked Pump Procedure
It is possible to clear a blockage/obstruction from the pump without having to drain the water from
the machine or disturbing the pump. If, however, there are concerns over the condition of the
water and there may be a risk of infection, e.g. from hepatitis etc, then bail the water from the
machine first. To assist in removing water from the machine, remove the inner bowl.
After removing the low profile agitator, the inner bowl, the pump hood and the cap, the impeller and
flapper can easily be accessed for servicing. Use this procedure to clear any foreign objects from
the machine.
Note: The impeller is not a field replaceable item and if it is damaged the entire pump
assembly must be replaced.
Drill hole in the two outer positions
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