Malfunctions And Remedies - Bottarini GDP21 Maintenance And Operating Manual

15. Undercarriage
Information regarding dual-row angular
bail bearings:
* These bearings are maintenance-free,
have been provided with a lifetime
lubrication. and have an extremely high
running performance.
* The bearings have been fixed in their
correct position using a safety flanged
nut. This flanged nut must be tightened
with a torque of 280 +/- 10 Nm.
* It is recommended to check this
tightening torque in the course of
service works.
* The flanged nut can only be unscrewed
and re-used once. Afterwards. a new
nut must be used. When releasing or
tightening the flanged nut, grease the
threads slightly, so as to avoid damage
to the fine thread.
*
Due to the high durability and the
maintenance-free design of these dual-
row angular ball bearings, there will be
no damage at the bearings under
normal conditions.
* If. due to exceptional circumstances.
problems were to occur with these
bearings, completely new brake drums
with pressed-in bearings, circlips and
new locking nuts should be installed in
principle.
* Due to the design characteristics of the
bearings, the brake drums and the
wheels may have a slight axial and
tilting play; however, this is
insignificant.
54

15.8 Malfunctions and remedies

Danger
Works on the brake system may only
be carried out in specialized
workshops.
When replacing braking shoes, make
sure that all brake shoes of the axle
are replaced.
When working at the wheel brakes,
make sure that the springs, the brake
shoes and the spreading lever are
correctly installed; observe the correct
sense of rotation.
When adjusting the wheel brakes, turn
wheels in forward direction!
Basically, a readjustment according to
chapter 15.6 "Fitting of the braking
system" must be effected whenever
works are carried out at the brake
system.
If the wheel brakes or the brake drum
have got very hot, continue to drive
carefully on, if possible, until they have
somewhat cooled down.