Parking Brake 0010 Parking Brake And Mounting - Terex TA30 Maintenance Manual

12
13
11
1 - Brake Disc
2 - Lockwasher
3 - Bolt
4 - Bolt
WARNING
When servicing parking brake parts, do not
create dust by grinding or sanding brake pads,
or parking brake parts. A water dampened
cloth should be used for cleaning parking
brake parts. Some brake parts may contain
asbestos fibres which can become airborne if
dust is created during servicing. Breathing
dust containing asbestos fibres may cause
serious bodily harm.
DESCRIPTION AND OPERATION
Numbers in parentheses refer to Fig. 1.
The parking brake consists of a sliding calliper acting
on a brake disc on a rear driveline. The parking brake
is of 'Inverted Design' i.e. requiring air pressure to hold
SM 1967 4-00
PARKING BRAKE - Parking Brake and Mounting
4
5
18
7
2 3
1
10
5 - Washer
6 - Nut
7 - Torque Plate
8 - Torque Plate
Fig. 1 - Parking Brake Mounting
14
19
9
8
15
6
6
9 - Bolt
10 - Parking Brake Guard
11 - Bolt
12 - Nut
13 - Lockwasher
the parking brake off.
Operation is by air pressure directed from the parking
brake control valve in the cab. When the control valve
is in the 'RELEASE' position, air pressure compresses
the coil spring in actuator (17), releasing brake pads
(15) from brake disc (1).
Placing the brake control valve in the 'PARK' position
cuts off air pressure and exhausts actuator (17)
through the brake control valve, allowing the coil spring
to expand. This movement exerts force on slack
adjuster (16), which is splined to the operating shaft, to
apply the parking brake.
Brake calliper (14), including brake pads (15), is free to
float on torque plates (7 & 8) bolted to brackets welded
on the trailer frame. It is important that torque plates (7
& 8) and brake calliper (14) slots are kept clean and
Section 170-0010
SM - 1908
17
16
14 - Brake Calliper
15 - Brake Pads
16 - Slack Adjuster
17 - Actuator
18 - Block
19 - Block
1
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