Brake System (Part NO. 7400050-50.1)

1.3.7

The service brake is an inertia-actuated (surge brake) system,

using hydraulic fluid conforming to Federal Specification VV-B-680.

The service brake system consists essentially of three major

units, the hitch assembly which includes the lunnette eye, spring

loaded cylindrical sliding section and an automotive hydraulic

brake master cylinder.

The unit also includes provisions for the

A cable

relief of braking pressure during backup of the vehicle.

operated emergency breakaway feature is incorporated into the

In event of breakaway from the towing vehicle,

inertia-actuator.

the cable attached to the towing vehicle operates a lever which

locks the actuator in the "on" position and maintains pressure on

In addition, the front dolly is equipped with a

the system.

The parking brake is activated through mechanical

parking brake.

linkage and mechanically locks the brakes on the front dolly

There are no brakes on the rear dolly.

assembly.