MCi Crusader II 1989 Maintenance Manual page 517

Date 1-1-89
Page- ___
17 _- 5 _ _
MC-9 MAINTENANCE MANUAL
IMMERSION
HEATER
PIPE PLUG
' )
·Figure 17-7. Lavatory Service Panel.
LAVATORY SERVICE PANEL
The fresh water fill service panel is located on the exterior
right hand rear side. See figure 17-7. Chemical tank flushing
and filling service points are located in the engine compartment
above the right hand rear side engine service door; A Hansen
6000 series quick connector is used for flushing and filling the
chemical waste tank. A Hansen 5000 series quick connector is
used for filling fresh water tank (figure 17-8). The flushing and
'illing inlet cap is made of molded vibrin plastic and a steel link
nain is used to attach the cap to the coach body to prevent loss
of cap. A lavatory service door assembly incorporates a cup-
shaped spring loaded seal to close off the fresh water fill
opening.
A manually operated dump valve is located under the chem-
ical tank in the dump tube. To drain the chemical waste tank.
pull the handle of the slide dump valve. After draining and
flushing. push the handle all the way in. A special hopper in the
floorof the service area (or equivalentto local health regulations)
with proper flush down facilities should be used to convey
waste contents to the sewer system.
Figure 17-8. Fresh Water Supply Fill Inlet.
WINTERIZING
Although DG-19 will freeze below +30°F. (· 1 "C.). upon thaw-
ing. the performance of the chemical will not be affected.
The most economical way to protect the assembly should it
be exposed to extreme cold temperatures, is to use an anti-
freeze solution such as ethylene glycol in the waste chemical
tank.
Based on the expected average low temperature and the
quantity of waste in the waste chemical tank. charge the tank as
follows:
Protects To:
Percentage of Antifreeze
Required in Tank
25% . 33%
· 40%
+10°F
(-12"C)
0°F
(-17°C)
-12°F
(-24°C)
CAUTION: Ethylene glycol can be fatal If a
sufficient quantity is swallowed. Do not use
automotive "stop-leak" formula which fre-
quently causes coagulation of the flushing
fluid when mixed with high quality deodor-
izing additives.
50%
-34°F
(-36°C)
For better odor control the· amount of chemical (DG-19)
sl:lould be doubled when used in conjunction with antifreeze.
SERVICE AND CLEANING
Servicing of the flush unit and tank (figure 17-9) should be
performed at regular intervals or when it becomes necessary.
1. After rinsing the tank. close the drain valve and fill toilet
with clean water until the water level reaches sight gauge level.
2. Flush the toilet three more times or until the liquid in bowl
becomes clear. This should remove any sediment which may
have collected in the pump.
3. Open the drair, valve and drain the tank while flushing
toilet.
4. Close the drain valve.
5. Recharge unit as per instructions under Charging System.
A thorough cleaning is essential prior to inspection for
determining the existence. exact location. and extent of any
defects. The assembly may be cleaned by scrubbing the inside
and outside surfaces with a solution of soap and water or five
tablespoons of liquid disinfectant to each gallon of water. Do
not use abrasive cleaners on any part of the assembly. Rinse
thoroughly with hot water and dry, using compressed air.