Hyundai HL955 Manual page 366

2) 2) OPERATION OPERATION
The two identical lining pads (7, 8) slide on the guide surfaces on the top of the housing and are
held in position by a lining spring (12). The brake itself is directly fixed on the gearbox with the two
guide pins (9).
The brake is positioned axially using the rubber buffers (10) between the brake housing (1) and the
guide pins (9), and the setting screw (11).
When the brake is actuated (= closed) a clamping force is created on the lining pads (7, 8) which is
transmitted to the brake disc. Under the force of the plate spring pack (5), the piston (6), together
with the adjusting screw (4), the pressure bolt (3) and the lining pad (7) are moved towards the
brake disc. When the lining pad (7) comes into contact with the brake disc, the reaction force
displaces the brake on the guide pins (9), against the spring force of the rubber buffers (10), until
the second lining pad (8) is also pressed against the brake disc.
The braking effect (braking torque) is dependent upon the frictional values of the brake linings.
The brake is released by complete pretensioning of the plate spring pack (5). The piston (6) is
moved back by the required minimum release pressure to the stop on the pressure ring (2).
During this process the brake positions itself, depending upon the setting, by the two rubber buffers
(10) up to contact with the setting screw (11). An equal air gap must be guaranteed on both sides
of the brake disc when set correctly.
The clamping force is reduced by wear of the lining pads (7, 8) and the brake disc.
The brake must then be readjusted.
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