TM 55-1520-240-23-3
3-71
BRAKES
3-71
A brake is installed on the axle flange of each of the six
wheels. All wheels are equipped with a single brake
disk and a three-piston brake unit. The brake unit does
not move. The disk floats inside of the wheel rim, and
rotates between the brake linings when the wheel is
turning. Keys inside the wheel rim match with key slots
in the brake disk. When the wheel turns, the keys drive
the disk around with the wheel. The brakes are operated
by hydraulic pressure applied by toe pedals. When
the right and left pedals are pressed at the same time,
hydraulic pressure pushes the pistons and brake linings
against the brake disk. The linings trap the disk and
slow it down on all wheels. When the right pedal or left
pedal only is pressed, brakes are applied only to that
side of the helicopter. This aids ground maneuvering.
BRAKE ASSEMBLY
The brake is made up of a housing, three pistons, three
brake linings, and parts to seal, adjust, and bleed the
brake. Three brake linings are on the pistons, and three
are on the anvil part of the housing.
3-190
