PRONAR T669XL, Operator'S Manual, Page: 103 / 135

SECTION 5 Pronar T669XL, Pronar T700XL
5.17
ATTENTION
Do not disassemble the membrane cylinder. The membrane is glued into and
may lose its tightness.
Clean the brake cylinder. If necessary, defrost the brake cylinder and drain
water through the unblocked vent holes. (pneumatic cylinder). Replace
damaged brake cylinder with a new one. When installing the brake cylinder,
maintain its original position with regard to bracket (7).
Rotate adjustment bolt (4) to align the marked expander arm opening with the
brake cylinder fork opening.
During the adjustment, membrane (2) must rest on the rear wall of the
brake cylinder – compare figure (5.8) - (pneumatic cylinder).
Install the brake cylinder fork pin and washers and secure the pin with cotter
pins.
Rotate adjustment bolt (4) to the right until one or two clicking sounds are
heard in the expander arm regulating mechanism.
Repeat adjustment activities for the other brake cylinder on the same axle.
Engage the brake.
Remove previous marks and measure the brake cylinder piston rod stroke
again.
If the brake cylinder piston rod stroke is outside the proper operating range,
repeat the adjustment.
5.2.9 CHANGE OF PARKING BRAKE CABLE AND ADJUSTMENT OF CABLE
TENSION.
Proper operation of the parking brake is dependent on the effectiveness of the front axle
brake and the correct brake cable tension.
Replacing the parking brake cable
Hitch trailer to tractor. Park trailer and tractor on level surface.
Place securing chocks under one trailer wheel.