PRONAR T669XL, Operator'S Manual, Page: 102 / 135

Pronar T669XL, Pronar T700XL SECTION 5
5.16
FIGURE 5.9 Principle of hydraulic brake adjustment
(1) cylinder piston rod, (2) cylinder housing, (3) expander arm, (4) adjustment bolt,
(5) cylinder fork, (6) fork pin, (7) brake cylinder bracket, (A) mark on the cylinder piston rod at
brake release position, (B) mark on the cylinder piston rod at full braking position, (C) position
of arm at brake release position, (D) position of arm at full braking position
Measure the distance between lines (A) and (B). If the stroke of the brake
cylinder piston rod is outside the proper operating range (25 – 45 mm), adjust
the expander arm.
Dismantle brake cylinder fork pin (6) – figure (5.8), (5.9).
Remember or mark the original position of pin (6) in expander arm opening (3)
– figure (5.8).
Check if the brake cylinder piston rod moves freely and within the whole
nominal range.
Check if the brake cylinder vent holes are not blocked with impurities and that
there is no water or ice inside the brake cylinder (pneumatic cylinder). Check if
the brake cylinder is correctly installed.