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Date
1-1-89
Page ___
1_1_-3 _ _
MC-9 MAINTENANCE MANUAL
partition of the lavatory compartment. A light on the instrument
panel marked "Lavatory Alarm" illuminates and a buzzer
sounds when. the switch is depressed
DEODORIZER
A block refill-type deodorizer is mounted on the side com-
partment partition. To install a new block, open the grille-cover
and place the block on the platform.
OCCUPIED SIGN
A lavatory occupied sign light is located on the exterior of the
forward lavatory compartment partition. This sign which reads
"Wash Room Occupied" is illuminated when the lavatory door
is closed and locked.
DOOR LOCK
The lavatory door lock has both inside and outside handles
and an insiqe latch to lock door from within the compartment.
When this latch bolt is locked it automatically turns on the
compartment ceiling light and the exterior occupied sign light. If
the lock fails to release, the door .can be opened from the
outside with a special key which is furnished to the driver.
The lock assembly can be removed from the door, then·
readily disassembled and the parts replaced. if necessary. A
light application of lubricant to all moving parts will assure free
operation.
.JOME LIGHT
A microswitch is installed in the door post at the edge of the
front partition. This switch is activated by the door lock mecha-
nism upon locking to energize the dome light and the "Wash-
room Occupied" sign on the outside wall. The switch is readily
serviced by removing the
two
screws securing the striker plate
to the post.
The lavatory dome light contains a 6-candlepower bulb that
lights with' the marker lights and a 32-candlepower bulb that
lights when the door is closed and locked.
SOAP DISPENSER
To refill the liquid soap dispenser. unscrew the plunger cap
which is threaded into the dispenser body. Remove cap and
pour liquid soap into dispenser tank until full. Replace plunger
cap into dispenser body.
Periodic cleaning of soap dispensing equipment should be
made a regular part of your washroo_m cleaning routine and
general maintenance program.
Sometimes a dispenser is considered in need of repair when
it may only be clogged and in need of a good cleaning. As a
general rule, all soap dispensing equipment should be flushed
out once a month to remove soap residue and dirt.
The exterior of the soap dispenser should be washed with
warm soap and water, then dried with a clean cloth.
Never use abrasive cleaners on parts of the soap dispenser
<1s this will mar the surlace.
If it becomes necessary to remove the soap dispenser for
cleaning, this procedure should be followed:
1. Remove the soap container from the cover.
2. Place a small chain. 24" (610 mm) long, inside the soap
container.
3. Add a small quantity of soap and warm water.
4.
Shake the container until the chain has dislodged all film
from the interior.
5. After removing the chain. thoroughly rinse the container
and let it dry before refilling with soap solution.
As part of your regular routine. make it a practice to check
the operating condition of the soap dispensing piston mecha-
nism at regular intervals to make sure it works freely. If it is not
working, disassemble and wash all. metal parts in soap and
water and let dry. Assemble and replace in service:
DOOR LOCK AIR CYLINDER
An air-operated air cylinder (1) is installed to provide positive
closing of the lavatory door. The cylinder also reduces rattles
and strain on lock. striker plates and hinge.
The cylinder is fed from the coach accessory air supply (4). A
pressure regulating valve (2) and a flow control valve (3) assure
a controlled closing action (figure 17 -6). Refer to Section 4,
Brakes and Air System. for detailed maintenance of regulating
valve.
The lavatory door air cylinder should be lubricated at regular
intervals - approximately every 30,000 miles (48,000 km). The
recommended procedure is as follows:
1. Remove air feed hose and put a few drops of SAE 30 oil
into the cylinder through the air hose connector .
2. Reconnect the feed hose.
·
3. Check air cylinder for leaks.
4. When overhauling air cylinder. it is important to replace all
seals. felts. cups and O-rings with new parts for proper opera-
tion. Also when overhauling cylinder. the new parts should be
coated with oil before assembly.
1. Air Cylinder - Door Closing
2. Pressure Regulating Valve
3. Flow Control Valve
4. Accessory Air Supply Connector
5. Air Line • Flow Control Valve to Cylinder
6. Air Supply Line to Regulator Valve
7.
Air Line - Coach Supply
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Figure 17-6. Lavatory Door Air Cylif_'lder Installation.
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