4
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 replace-
ment other than the shaft seal which, under normal condi-
tions, should provide several years of service before
needing replacement. The seal only requires replacement
if signs of leakage are noticed under the seal housing posi-
tioned between the motor and toilet base assembly.
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, snap off the white motor cover
and remove the pump assembly by removing the four
screws with lock washers that secure it to the 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 necessary to gently tap the chopper
against the macerator housing to free it from the base.
Prevent the motor shaft from turning by inserting a screw-
driver in the shaft slot at the rear of the motor and unscrew
the chopper. Remove the chopper, lock washer 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 centrif-
ugal 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 washers 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 stain-
less 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 hous-
ing 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 plate on the end of the shaft and screw the
locking nut onto the shaft. Tighten the nut 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 properly 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. Replace
the white motor cover by snapping it down over the
pump motor.
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.
WARNING
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