Checking Of Mechanical Brakes - PRONAR T672ECO User Manual

Periodic inspections of the trailer
5.12

CHECKING OF MECHANICAL BRAKES

ADVICE
Checking the technical condition of the brakes:
• according to the schedule of inspections,
• before the period of intensive use.
• after repairing the braking system.
• in the event of uneven braking of the trailer wheels.
In a correctly adjusted brake the cylinder
piston stroke brake should be within the
range given in Table 5.3 and depends on
the type of cylinder used. When the wheel
is fully braked, the optimal angle between
the expander lever and the piston rod
should be approx. 90 °. With this setting,
the braking force is optimal. Checking the
brakes consists in measuring this angle
and the piston rod stroke in each wheel.
THE SCOPE OF ACTIVITIES
• Measure the distance X with the
tractor brake pedal released.
• Measure the distance Y with the
tractor brake pedal pressed.
• Calculate the distance difference X-Y
(rod stroke).
X
Y
B
A
4
3 2 5 1
Figure 5.10 Brake check
(1) cylinder piston (2) expander arm
(3) adjustment screw (4) of the cylinder fork
(5) pin position
(A) position of the arm in the released position
(B) arm position in braking position
• Check the angle between the cylinder
piston axis and the expander lever.
• If the expander arm angle (2) and
piston rod stroke exceed the range
given in table 5.3, the brake should
be adjusted.
PRONAR T672ECO
Chapter 5
621-I.10-1
I.3.4.622.13.1.EN
5.15