Functional Description of the Dual-Circuit Brake System

TM 5-2420-224-20-1

AIR SYSTEM (CONT)

Functional Description of the Dual-

C i r c u i t Ai r B r a k e S y s t e m

Compressed air can be obtained at both the

The compressed air generated by the engine

pressure regulator and at the pressure tanks.

compressor (1.1) is directed to the antifreeze

pump (3.2) from which it reaches the pressure

The air tank (5.1) contains supply pressure for the

regulator (2.1) automatically mixed with antifreeze

trailer brake booster (27.2), the trailer protection

during winter operation.

valve (a) and the auxiliary consumers. Air tank

pressure is indicated by means of a dual pressure

The pressure regulator filters the air and limits the

gauge (11.2) and monitored via a warning light

system pressure to 107 PSI/7.35 bar (operating

(9.1) and a warning buzzer.

pressure). The pressure regulator is equipped

with an inflation connection. For inflating tires, the

The air tank (5.1a) provides compressed air to the

operating pressure is reduced below 87 PSI/6.0

trailer brake system, the antijackknife brake valve

bar (cut-in pressure of the pressure of the

(15.1) and the safety valve (33.2).

pressure regulator 90 PSI/6.2 bar).

For trailer operation, this valve (33.2a) is actuated-

The two air tanks (5.1), 27 l capacity, and (5.1a),

depressed by hand (push to supply trailer). The

10 l capacity, are filled simultaneously. The air

supply pressure flows to the trailer protection valve

tanks are equipped with safety valves (30.1) which

(45.) and from there further via the shut-off valve

open in the case of fault or at excess pressure

(8.3) and coupling head (35.0) to the trailer.

(approx. 131 PSI/9.0 bar).

(See trailer operation)

Two overflow valves (7.2) maintain the pressure in

the air tanks. From a pressure of 75 PSI/5.2 bar,

both tanks are connected by means of overflow.

A test connection is provided at each output of the

pressure tanks.

Change 1

1-16.5