PREVOST X3-45 Multiplex, Maintenance Manual

Page: 1280 / 1422

Section 23: ACCESSORIES
PA1562
20
6.11 FLUSH PUMP
The submersible-type flush pump is mounted
inside an enclosure in the sump tank (Fig. 26).
The enclosure is provided with a screened side
which, serves as a strainer to prevent solid
matters from entering the pump.
The pump requires no periodic maintenance other
than cleaning of the strainer side using a water jet
introduced through the circular cap opening, once
the sump tank is completely drained. The pump
can run dry periodically without damage. However,
for maximum seal life, the run dry periods should
be kept to a minimum.
CAUTION
If vehicle is stored for an extended period of
time, make sure to clean the strainer as solid
matter will tend to pack, and will necessitate
replacement of strainer.
6.11.1 Flush Pump Removal
1. Remove the toilet to gain access to the pump
enclosure.
2. Remove the flush pump enclosure cover
3. Unsnap the flush pump.
6.12 SUMP
TANKS
6.12.1 Main Sump Tank Draining
When recirculating water in the toilet is soiled,
drain main sump tank. If equipped with the
optional auxiliary sump tank, drain the main
sump tank contents into the auxiliary tank and
perform the filling procedure of the main tank.
6.12.2 Main Sump Tank Filling
Open the main sump tank overflow cock and
connect a water supply hose to the toilet sump
tank fill connection. The main tank is full when
water starts flowing through the clear overflow
tube. Close main sump tank overflow cock when
the tank is full.
CAUTION
In cold weather, add 2 gallons (9 liters) of
antifreeze (e.g.: ethylene glycol) in the toilet
before filling main tank.
6.12.3 Auxiliary sump Tank Draining
Remove drain cap located under auxiliary sump
tank then turn the auxiliary sump tank drain
valve lever counterclockwise eight or nine times.
Remove the access cap and flush tank with clean
water. To close, turn the valve lever several
times clockwise until the rubber bladder seals
the drain hole. Reinstall access and drain caps.
CAUTION
Lavatory tanks should be serviced only at
suitably equipped stations.
NOTE
It is unlawful to dump sump tank contents in any
location other than those designated as such.
When a full draining is required, clean main tank
by repeating the draining and filling operations
while leaving the auxiliary sump tank drain cock
opened. Close cocks and pour a pack of
commercial toilet deodorant (Prévost part
#900329) in toilet before adding the antifreeze and
starting final filling of main tank.
WARNING
The toilet deodorant contains products that can
be very irritating to skin. Use rubber gloves
when handling and then clean toilet seat.
WARNING
Antifreeze must comply with the effective
environmental act.
CAUTION
When cold weather is expected and there is no
antifreeze in the tank, both sump tanks must be
drained.
NOTE
If there is no antifreeze solution in the tank,
there is less risk of freezing if engine is
operating due to the heat it produces.
NOTE
New coaches are delivered with the sump and
fresh water tanks empty. Fill with water before
putting the coach in service.