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Technical Support
2
Figure 6.6
Pneumatic brake adjustment
(1) cylinder piston, (2) cylinder diaphragm, (3) expander arm, (4) adjustment screw,
(5) fork of the cylinder, (6) fork of the fork, (7) cylinder of the cylinder, (A) mark on the piston rod in the
braked position, (B) mark on the piston rod in the fully braked position, (C) position of the arm in the
unlocked position, (D ) arm position in full braking position
THE SCOPE OF ACTIVITIES
• Hitch trailer to tractor.
• Turn off the tractor engine and remove
the keys from the ignition.
• Immobilize tractor with parking brake.
• Make sure the trailer is not braked.
• Secure trailer against rolling with
wheel chocks.
• On the piston rod (1) - figure (6.7),
(6.8) of the cylinder mark with a line
(A) the position of the maximum re-
traction of the piston rod with the
B
A
7
A
C
D
1
6
3
trailer brake off.
• Press the brake pedal on the tractor,
mark with a line (B) the position of
maximum extension of the piston rod.
• Measure
the
the lines (A) and (B). If the piston
rod stroke is not within the correct
working range (25-45mm), adjust the
expander arm.
• Remove the actuator fork pin (6).
• Remember or mark the original po-
sition of the cylinder fork (6) in the
PRONAR T672ECO
Chapter 6
25-45 mm
5
4
589-J.04-1
distance
between
6.7
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