WASTE PUMP SERVICE
The Jabsco Quiet-Flush Toilet does not require routine main-
tenance 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 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 elec-
trical power to the toilet and rinse water pump. Take pre-
caution to ensure it is not turned on until the service is com-
plete. Also, pump all water from the toilet bowl and if con-
nected 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 hous-
ing 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 macera-
tor 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 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 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 posi-
tioned 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
lock washer on the end of the shaft and screw the chopper
onto the shaft. Tighten the chopper 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 hous-
ing 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.
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