1-19. AIR SYSTEM.
The air system consists of the air compressor, air dryer, air reser-
voirs, and various air lines. Also included in the air system are the air pressure gages
located on the dashboard which are used for monitoring air pressure for safe opera-
tion of all air-operated components of the vehicle.
On the M917A1 and M917A1 w/MCS, the chassis air system sup-
plies air to operate the Central Tire Inflation System (CTIS) and the tailgate release
air cylinder (TM 5-3805-264-14&P).
On the M917A1 w/MCS, the chassis air system interfaces with the
MCS air system to operate the MCS tailgate (TM 5-3805-264-14&P).
The dual air brake system consists of two independent air brake sys-
tems that use a single set of brake controls. Each system has its own reservoirs,
plumbing, and brake chambers. The primary system operates the service brakes on
the rear axle; the secondary system operates the service brakes on the front axle. On
tractor-trailer configurations, service brake signals from both systems are sent to the