Monaco 2009 Knight, Owner'S Manual

Page: 212 / 260

208
2009
K
night
Chassis Information - 1
0
NOTE
When the park brake is released, the
Park illumination lamp will remain lit
until air system pressure is above 65 psi.
WARNING
When parked with the air tank not
depleted, there is possibility of an
accidental release of the parking
brake. Traveling with small children
and/or pets may require a small block
to be fabricated to prevent accidental
release. The block should be placed
under the knob on the dash panel. A
wooden clothes pin clasped at the base
of the shaft will work.
Automatic Slack Adjuster
The braking system is equipped with
automatic slack adjusters. As brake lining
wears, the slack adjusters will automatically
ratchet on the return stroke as needed. This
ratchet action will keep the brake lining at
proper adjustment. Automatic slack adjusters
and the connecting S-cam shaft require
periodic lubrication and inspection.
NOTE
Replacement parts should be of the
same original equipment size and type.
Mixing brake components may result
in unequal braking action. Brake
maintenance is not covered by the
manufacturer.
WARNING
Brake lining may contain asbestos
material and should only be serviced
by qualified service technicians
who are trained in the appropriate
precautionary procedures. If any loss
of braking effectiveness or abnormal
braking indications are noticed, the
brakes and slack adjusters should
be inspected by a qualified brake
technician.
WARNING
DO NOT manually adjust the slack
adjusters. If any loss of braking
effectiveness or abnormal braking
indications are noticed, the brakes and
slack adjusters should be inspected
by a qualified brake technician.
Automatic slack adjusters are not
designed to be manually adjusted.
Brake Systems - Backup
The motorhome air braking system is
equipped with backup safety systems
and warning alarms in the event of air
system failure. For example: should the air
compressor fail to charge the air system and
low air gauge readings go undetected, a low
air pressure buzzer will sound and a low air
pressure dash light will flash. These warning
indicators occur at approximately 65 psi to
alert the operator of an impending situation. If
the motorhome is allowed continued operation,
the pneumatic emergency spring brake relay
valve installed in the air system senses the low
air pressure condition and will release the air
charge from the spring brake air chambers on
the rear drive axle. In this case, the park brakes
will automatically apply at approximately
30 psi. This safety backup system acts as an
automatic emergency brake system.
Another backup safety is the air system
separation of the front and rear brakes,
implemented by using two air tanks. One tank
is located in the front and the other is located
in the rear. This separation allows the front air
tank to operate the front brakes; the rear tank
operates the rear drive axle brakes. This tank
division gives reassurance in case one tank
experiences a failure of an accessory air item
allowing the compressed air to escape.
Accessory air items are other pneumatically
operated items such as the air horn, vacuum
generator, etc. The accessory air items operate
only when air tank pressures exceed 65 psi.
This is done with pressure protection valves.
Should an accessory air item fail, the pressure
protection valve (PPV) reserves the remaining
air pressure of 65 psi for braking. This will
leave the motorhome with one air tank fully
charged for safety backup.
The rear air tank also has a safety backup -
the safety inversion valve. The inversion valve
senses the absence of rear air tank pressure.
In this case the inversion valve will allow the
operator to make a modulated spring brake
application in conjunction with the emergency
spring brake relay valve. The inversion valve
allows the front air tank pressure to recharge
the rear brake chambers after the modulated
spring brake application is made.
This backup
system implements use of all the brakes,
allowing the operator to bring the motorhome
a safe stop. In case of all compressed air
charge escaping from the front air tank, the
operator will still have full use of the rear
brakes.