Maintenance work on the carrier
7.11 Vehicle brake
7 - 86 3 302 744 en Maintenance manual
GMK5250L
09.03.2018
On the brake calliper under the brake cylinder
• Remove the cap (1) – the hexagon head (2)
is then exposed.
• Place the ring spanner (3) on the hexagon
head.
• Turn the ring spanner half a turn clockwise.
Leave the ring spanner attached.
• Ask a second person in the driver's cab to
apply the brakes (approx. 5 times at approx.
1 bar) and observe the rotation of the ring
spanner.
• Remove the ring spanner.
• Replace the cap.
The way the ring spanner rotates allows you to assess the condition of the
adjustment mechanism.
The adjustment mechanism is OK if the ring spanner
– turns one step anticlockwise at each brake application,
– rotating a small angle at each step.
The adjustment mechanism is defective if the ring spanner
– fails to turn at any of the brake applications,
– or turns only at the first brake application,
– or at the brake application first turns anticlockwise but then turns back
clockwise again.
If the adjustment mechanism is defective then you must have the vehicle
brakes repaired;
à Having the brakes repaired, p. 7 - 87.
G
Risk of injury due to rotation of the ring spanner.
If you are holding the ring spanner when another person in the driver's cab
applies the brakes your hand could be crushed.
Do not hold the ring spanner when another person in the driver's cab
applies the brakes. Just observe the rotation of the ring spanner from a safe
distance.
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