Maintenance work on the carrier
7.11 Vehicle brake
09.03.2018
Maintenance manual 3 302 746 en 7 - 85
GMK5200-1
Checking the
brake pads
• Check the thickness of the brake pads on all axle lines.
Each brake calliper (1) carries two brake pads (2), arranged one to the left
and one to the right of the brake disc (3).
This first axle line has two brake callipers per brake disc. The second to
fifth axle lines have one brake calliper per brake disc.
On the brake calliper
• Measure the pad thickness (A).
New brake pads have a pad thickness of
23 mm (0.90 in).
You must have the brake pads replaced if
– the brake pad thickness is less than 2 mm
(0.08 in) or
– the brake pads are burnt, glassy, broken or
oily;
à Having the brakes repaired, p. 7 - 87.
• Check that the electrical cable to the wear
display is undamaged.
H
The brake pad wear (A) is taken up by the automatic adjustment mecha-
nism. When the pad thickness is small, the travel adjustment is large and
you must also check the adjustment mechanism;
à Checking the adjustment
mechanism
, p. 7 - 85.
Checking the
adjustment
mechanism
• Using a ring spanner, check all the brake callipers.
s
S
There is a risk of damage if an unsuitable tool is used.
The use of an unsuitable tool can damage the hexagon head of the adjust-
ment mechanism. An unsuitable tool can slip off the hexagon head or can
become jammed.
Always use a ring spanner, never an open-jaw spanner.
When you apply the brakes the ring spanner on the hexagon head will
rotate with it. Therefore check in advance that there is sufficient clearance
for this rotational movement.
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