shall be provided with a guard to prevent accidental deployment of the tire chains.
AIR SYSTEM
An air brake system meeting the requirements of the FMVSS-121 shall be provided. The system
shall consist of three (3) reservoirs with a 4,362 cu. in. volume. The air system shall consist of the
following components:
Dual air system with dual gauges and a warning light and buzzer.
Spring actuated parking brake built into the rear axle brakes with a manual control and warning
light in the cab. These shall automatically apply in case of air system failure. A mechanical means
of releasing the spring brake shall be provided in the event of total loss of air pressure.
This system shall be a quick build up system shall be provided, capable of building enough air
pressure to release the brakes in less than thirty (30) seconds, when starting with the entire air
system at zero pounds pressure.
The brake system shall be a split system. One system serving the rear brakes and one system
serving the front brakes. The two systems shall be connected with a double check valve that shall
automatically shuttle air from the front system to the rear system should loss of air pressure occur.
This system shall also modulate the amount of air so the spring brakes shall apply in direct
relationship to the amount of pressure applied to the treadle valve.
The brake system shall be equipped with a Bendix SR-1 valve to provide modulated spring brakes
in the event there is low air pressure in the rear axle air supply reservoir.
The spring brakes shall be piped in such a manner that if the treadle valve is depressed while the
spring brakes are applied, the spring brakes shall release and remain released as long as the treadle
valve is depressed. They shall reapply immediately when the treadle valve is released.
The piping in the air system shall be HD nylon reinforced color coded tubing for all stationary
lines.
AIR DRYER
The air system shall include a BENDIX AD-SP air dryer.
The air dryer shall incorporate an integral turbo cutoff valve.
A 12 volt thermostatically controlled heated moisture ejector shall be an integral part of the air
dryer.
MANUAL AIR TANK DRAINS
All air reservoirs shall have manual 1/4 turn drain valves. The drain valves shall be supplied with
rubber seats to reduce air system leaks.
AIR INLET / OUTLET
An outside air system inlet/outlet connection shall be provided and mounted in the driver's cab step
area. A pipe thread frame coupling shall be provided with 1/4" npt threads. The Town shall install
the appropriate female hose quick connect fitting for proper operation.
AIR AUTO-EJECT
The chassis shall be equipped with a KUSSMAUL automatic air line disconnect. A Kussmaul
