WASTE PUMP SERVICE
The Jabsco Quiet-Flush Toilet does not require routine
maintenance other than occasional cleaning to maintain
a hygienic sanitary condition. Clean toilet with mild non-
abrasive cleaners without strong aromatics. Cleaners
having high concentrations of aromatics such as pine
scented concentrated cleaners and strongly scented
degreaser concentrates can cause the pump’s seal to
swell and may contribute to a premature seal leak.
The toilet has no wearing parts that need periodic
replacement other than the shaft seal which, under
normal conditions, should provide several years of ser-
vice before needing replacement. The seal only requires
replacement if signs of leakage are noticed around the
base and rear of the toilet china bowl.
NOTICE: Before performing any service, turn off the
electrical power to the toilet and rinse water pump. Take
precaution to ensure it is not turned on until the service
is complete. Also, pump all water from the toilet bowl
and if connected to an overboard discharge, close the
discharge seacock.
To replace the shaft seal, remove the two toilet hold-
down screw caps and remove the hold-down screw nuts.
Carefully lift the toilet up and away from the bulkhead at
its rear. Remove the pump assembly by removing the
four screws with lock washers that secure it to the
plastic toilet base. Carefully slide the pump assembly
from the base ensuring the macerator housing also
slides out of the base with the pump. The pump chopper
will engage the macerator housing and it may be neces-
sary to gently tap the chopper against the macerator
housing to free it from the base.
Prevent the motor shaft from turning by inserting a
screwdriver in the shaft slot at the rear of the motor and
unscrew the nut retaining chopper blade. Remove the
chopper and macerator housing from the motor shaft.
Remove the O-ring from the O-ring groove around the
outer diameter of the seal housing. With an allen
wrench, loosen the centrifugal impeller set screw and
slide the impeller off the shaft. Remove the two screws
that secure the seal housing to the motor and slide the
housing off the motor shaft. Remove the two seal wash-
ers from under the head of each of the two seal housing
retainer screws. With a pair of needle nose pliers, grasp
the shaft seal and pull it from the seal housing. Clean all
parts and inspect for damage.
Lubricate the OD of the new seal with a small amount of
water and press it into the seal bore with the seal’s lip
facing the threaded end of the shaft. Do not use the
stainless steel star retaining washer supplied with the
seal. Lubricate the ID of the seal and the motor shaft
with a small amount of water resistant grease. Ensure
the slinger is properly positioned on the motor shaft next
to the motor and slide the seal housing onto the motor
shaft until it is against the motor end bell. Position a new
plastic seal washer under the head of each of the flat
head seal housing retainer screws and secure the seal
housing to the motor. Slide the centrifugal impeller on
the motor shaft positioning it about 1/32" (1 mm) from
the seal housing and secure it to the shaft with the set
screw. Rotate the impeller to ensure it does not rub on
the seal housing.
Slide the macerator housing over the motor shaft, place
the chopper onto the shaft. Tighten the nut retaining the
chopper blade while holding the motor shaft at the rear
of the motor. Position a new O-ring in the seal housing
O-ring groove (it may be retained in the groove with a
small amount of grease). Slide the pump assembly into
the toilet base ensuring the macerator housing is prop-
erly positioned within the base. The cut-out in the side of
the macerator housing must align with the discharge port
in the base (the macerator housing is keyed so it will
only go in when properly positioned). Ensuring the O-
ring is still properly positioned in the O-ring groove in the
seal housing, place the pump assembly against the base
and secure it in place with the four screws and lock
washers.
Carefully lift the toilet and position over the two hold-
down screws using caution not to chip or break the
china. Secure the toilet down with the hold-down nuts
and washers ensuring the plastic washer is next to the
china.
Do not overtighten hold-down nuts.
Flood hazard. If toilet is plumbed to an
overboard discharge, close the discharge
seacock prior to disassembling toilet.
Failure to do so can result in flooding which
can cause loss of property and life
.
W
ARN
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