TECHNICAL DESCRIPTION, OPERATING, MAINTENANCE AND REPAIR MANUAL
3.10.2 Venting
It is most important thoroughly vent the brake system, otherwise the system function
may be unreliable and the brakes may fail. There are two main reasons of air entry into
the brake system:
1. Disconnected or released hoses
2. Insufficient quantity of brake fluid.
Fig. 28 Brakes venting (retractable underdarriage)
Procedure:
1. Loosen the vent screw in appropriate brake cylinder (OS).
2. Pull brake control lever in the cockpit and hold at a rear position.
3. Tighten the vent screw.
4. Repeat several times until the brake control lever offers resistance against motion.
5. Full tighten the vent screw.
CAUTION
If brake efficiency remains unsatisfactory after venting, there is
necessary to fill brake fluid and vent the system again.
3.10.3 Brakes adjustment
The brakes adjustment carries out after the brake system venting and after a brake plate
replacement. The main landing wheels are braking together by means of the brake
control lever pulling in the cockpit. The brake effect adjustment is carried out at the
brake control lever in the cockpit. Bowden cable leads from the brake control lever to
the main brake hydraulic face ram, it is adjusted so that at rear detent position of the
brake control lever ( a parking position ) the aeroplane is full braked.
Date: 05.12.2007 Rev.2 WT-9 Dynamic Section 3 Page 3 - 19
OS
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