Section 10 — cHaSSiS information
20
camelot 2007
Should a failure occur in the air system,
preventing the air pressure from building, it
may become necessary to “cage” the spring
brakes (
“cage” procedure in
Section 2 Towing
Procedures -
Disabling Parking Brake
). This
is an emergency procedure only. Caging the
rear air brake chambers manually overrides the
spring brakes and allows the vehicle to move.
This procedure does not affect normal service
braking.
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 is 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.
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 flash. 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, 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.
Summary of Contents for Camelot 2007
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Page 49: ...45 Section 2 Driving Safety Camelot 2007 Weight Record Sheet Actual Worksheet 020255b...
Page 53: ...49 Section 2 Driving Safety Camelot 2007 Weighing Procedure Worksheet 020255c...
Page 106: ...appliances 4 102 Camelot 2007 Notes...
Page 140: ...Section 5 Equipment 136 camelot 2007 Notes...
Page 155: ...151 Section 6 water systems camelot 2007 Water service center Typical Water System...
Page 156: ...Section 6 water systems 152 camelot 2007 Notes...
Page 186: ...Section 8 Electrical Systems House 182 camelot 2007 Notes...
Page 202: ...Section 9 Electrical Systems Chassis 198 camelot 2007 engine no start flow chart...
Page 244: ...Section 10 chassis information 240 camelot 2007 42 Tag Axle Models 070171i 070171j...
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