PRONAR T023, Manual, Page: 74 / 99

PRONAR T023, PRONAR T023M SECTION 5
5.14
Check if the brake cylinder pistons move freely and within the whole nominal
range.
Confirm that vent holes of brake cylinders are not blocked with impurities and
that there is no water or ice inside the brake cylinders. Check if the brake
cylinders are correctly installed.
Clean the brake cylinders. If necessary, defrost the brake cylinders and drain
water through the unblocked vent holes. Replace damaged brake cylinders
with new ones. When installing the brake cylinder, maintain its original position
with regard to bracket (7).
Dismantle the expansion ring securing the expander arm.
Shift the expander arm to align the marked expander arm opening with the
equalising bar fixing hole.
During adjustment, membrane (2) must rest on the rear wall of the
brake cylinder – compare figure (5.8).
Repeat all the above-mentioned activities for the second cylinder.
After completed adjustment, expander arms of both cylinders must be
positioned in parallel with regard to each other.
Install the equalising bar, brake cylinder fork pin and washers and secure the
pin with cotter pins.
Engage the brake.
Remove previous marks and measure the brake cylinder piston stroke again
(on both cylinders).
If the brake cylinder piston stroke is outside the proper operating range, repeat
the adjustment.
INSPECTION
•
Every 6 months.
•
After repair of braking system.
•
In case of uneven trailer wheels braking.