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Technical inspection schedule
5.13 INSPECTION OF MECHANICAL BRAKES
TIP
Check technical condition of brakes:
• according to the inspection schedule,
• before the period of intensive use,
• after repair of braking system,
• in case of uneven trailer wheels braking.
In a properly adjusted brake, the piston rod
stroke 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°C. This setting ensures the
best possible braking force. The inspection
of brakes consists in measuring this angle
and the brake cylinder rod stroke for each
wheel.
PROCEDURE
• Measure the X distance when the
tractor brake pedal is released.
• Measure the Y distance when the
tractor brake pedal is depressed.
• Calculate the difference between the
X
Y
B
A
4
3
2
5
1
Figure 5.11
Inspection of brake
(1) cylinder piston rod
(3) adjusting bolt
(5) pin position
(A) position of arm at brake release position
(B) position of arm at braking position
distances (X-Y) (cylinder rod stroke).
• Check the angle between the cylinder
rod axis and the expander lever.
• If the expander arm angle (2) and the
cylinder rod stroke are outside the
range specified in Table 5.3, adjust
the brake.
PRONAR T700M/1
Section 5
526-I.11-1
(2) expander arm
(4) cylinder fork
I.3.4.622.13.1.EN
5.17
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