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Beschikbare talen
Beschikbare talen
Installation instructions for brake shoes on the
type 7 wheel brake
Changing brake shoes on the type 7 wheel brake
As soon as a brake lining is worn down to a thickness of 2 mm, the brake shoes should be
replaced. Important: Brake shoes should only be changed as complete axle sets. The changing
of brake shoes should be carried out in a specialist workshop. Ensure that all the brake shoes
on each axle have the same quality brake linings. The return springs and clamping springs must
be replaced each time the linings are changed.
The procedure
Ensure that the vehicle cannot move (apply the handbrake or place chocks under the wheels).
Loosen the wheel bolts, jack up the trailer, and release the overrun hitch and the handbrake
lever (tension-free). Remove the wheels and hub caps. Before removing the brake drums the
brake shoes must be retracted by turning the adjusting bolt in an anti-clockwise direction.
Undo the axle nut, remove the wheel hub and mark it to ensure that it is refitted to the same
axle stub. Due regard must be given to the general maintenance instructions.
Disconnect and replace the clamping spring (4) and the return spring (7). In the case of brakes
manufactured before June 1998, the pin (2) and the return spring (5) are also replaced. The
return spring (7) is not fitted to this model.
Remove and replace the brake shoes (6). Remove any brake dust from the brake plate.
The parts are reassembled in the reverse order.
Before fitting the brake shoes, check the operation of the automatic reversing mechanism.
When doing so pay particular attention to ensuring that the swivel cam moves freely. It may
be necessary to lubricate the side surfaces (the contact surfaces between the brake shoe
and the adjusting nut) with copper grease.
The brake must be adjusted to ensure that it functions perfectly (see "Wheel brake adjustment").
Follow the general maintenance instructions to refit the wheel hub. In the case of brakes that
are operated by means of a system of pull rods, the brake lever bearings in the centre of the
axle must be re-greased.
4
Item
name
1
Adapter sleeve
2
Pin *
3
Return spring
4
Clamping spring
5
Return spring *
(Spring eyes are at an angle of 90° to each other)
6
Brake shoe
7
Return spring
(Spring eyes are in the same plane)
* This component is not fitted to brakes manufactured from
June 1998 onwards.
Items 2 (pin) and 5 (return spring) are not included in the parts
kit for brake S 3006-7.
Quantity
2
2
2
4
2
4
2
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