6
A) Component Description
Wheel bearing clearance
The wheel bearing clearance has to be adjusted as in the past.
Axle nuts
The axle nuts have a right-hand thread on both sides. The wheel
hub is secured with a lock nut.
Brake shoes
The brake shoes are each supported spherically on a ball and are
held by a spring clamp. Only one return spring is required for the
return of the brake shoes. The brake shoe cam rollers are guided
exactly in the specially machined S-cam profile.
Brake linings
Two different asymmetrically formed lining segments are riveted
onto the brake shoes. The thicker end of the lining is installed on
the S-cam side (cam roller).
As a result of this scythe-shaped brake lining contour, uniform maxi-
mum wear of the brake lining over the whole surface is achieved
during normal operation.
The brake linings have an embossed groove on the end surfaces
which indicates the maximum permissible lining wear.
Camshaft
The camshafts are mounted in the brake carrier and in the slack
adjuster in a compact bearing which allows quick replacement. Both
bearings have grease nipples and must be regresed every 12 months.
Both bearings have a long-life lubrication and are protected by seal
rings and rubber sleeves against the ingress of dirt and splash water.
On the slack adjuster end the camshaft has a milled groove and a
slip-on indicator for visual checking of the brake lining wear.
When the wear indicators have reached a horizontal position, an
inspection of the brake lining thickness must be carried out.
Max. permitted radial play: 2 mm
Inspection of the brake lining thickness
During maintenance work, the thickness of the brake linings can be
inspected at two sight holes in the rear cover plate.
