Brake Adjustment/Slack Adjuster; Brake Systems - Backup - Monaco DYNASTY 2006 User Manual

Brake Adjustment/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. Brake adjustment should not be necessary. 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.

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 warning buzzer will sound and a low air pressure dash warning indicator light
will fl ash. These warning indicators occur at approximately 65 psi. This will 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 and tag 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, step well cover, 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, made 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 has been
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.
318 • SECTION 10 — CHASSIS INFORMATION DYNASTY 2006