Specifications

17
REAR BRAKES
The rear brakes shall be Meritor 16.50 inch X 7.00 inch S-cam drum type. The brakes shall feature a cast
iron shoe.
PARK BRAKE
Upon application of the push-pull valve in the cab, the rear brakes will engage via mechanical spring
force. This is accomplished by dual chamber rear brakes, satisfying the FMVSS parking brake
requirements.
PARK BRAKE CONTROL
A Meritor-Wabco manual hand control push-pull style valve shall operate the parking brake system. The
control shall be yellow in color.
The parking brake actuation valve shall be mounted on the left hand dash to the right of the steering
column within easy reach of the driver.
FRONT BRAKE SLACK ADJUSTERS
The front brakes shall include Meritor automatic slack adjusters installed on the chassis which features a
simple, durable design offering reduced weight. The automatic slack adjusters shall feature a manual
adjusting nut which cannot inadvertently be backed off and threaded grease fittings for easy
serviceability.
REAR BRAKE SLACK ADJUSTERS
Haldex rear brake automatic slack adjusters shall be installed on the axle.
AIR DRYER
The brake system shall include a Bendix AD-9 fully self contained air dryer which shall not require an
extra purge tank or additional valves. The AD-9 system shall include a spin-off desiccant filter with a 12-
volt, 75-watt thermostatically controlled heating element.
AIR COMPRESSOR
The air compressor provided for the engine shall be a Wabco
®
SS318 single cylinder pass-through drive
type compressor which shall be capable of producing 18.7 CFM at 1200 engine RPMs. The air
compressor shall feature a higher delivery efficiency translating to more air delivery per horsepower
absorbed.
MOISTURE EJECTORS
Manual cable actuated drain valves shall be installed on all reservoirs of the air supply system. The
actuation pull cables shall be coiled and tied at each drain valve. The supplied cables shall be extended
and be sufficient in length to allow each drain to be activated from the side of the apparatus.