B06 20 243 E-EN
page 14 / 23
09.2010
Installation and Maintenance Manual
CB8-E
4.10 Adjustment of reserve stroke
The reserve stroke avoids, that the brake gets "on block" position and no more braking force is
transmitted to the disc any more. Without counteraction the reserve stroke would decrease with
increasing lining wear. Therefore the disc brake CB8-E is provided with an automatic readjusting unit
by default.
As the compensating capacity per braking cycle is limited, a regular inspection of the reserve stroke of
the closed brake is indispensable. Depending on the application a "manual" adjustment might be
necessary.
CAUTION
An insufficient or not existing reserve stroke may lead to a failure of the brake.
To check the reserve stroke remove the cap at the top of the protection cover. Push in the piston rod
of the thrustor manually against block. The reserve stroke can be measured between the roller of the
release lever and the piston rod with a feeler gauge or by eye (see figure 8). It must be approx. 7 mm.
Fig. 8: Checking the reserve stroke indirectly at the thrustor piston rod
Alternatively the reserve stroke can be controlled directly by removing the cover and the sealing at the
top of the brake housing. The distance between the square part and the housing can be measured
through the control window with a feeler gauge or by eye. It must be approx. 3 mm ( = 50% of control
window, see figure 9).
PLEASE NOTE
If the reserve stroke falls below, a "manual" adjustment has to be made by opening and
closing the brake against the stagnant disc until the required reserve stroke is reached again.
piston rod
roller
