Hydraulic brakes settings and 1.4.
maintenance
Description1.4.1.
Brakes are twin-disk with four working pistons hydraulically
controlled within a closed circuit, placed inside the wheels
of the main undercarriage. The main control piston is on
the control stick.
Operation1.4.2.
Pressure, which is made by pulling the lever, impacts on the
working pistons inside the brake, which pushes the group of brake pads and the fl oating discs to the central adjusting
nut. This is the principle of wheel braking. Pistons and brake pads are returned by the pressure of springs. It is possible
to lock the brake lever in the operational position – parking brake.
Refi lling and deaerating1.4.3.
- Put the plane on control stands. Disassemble the wheel; let the brake in position.
- Inject car-brake fl uid into the system using fi lling screw. Loosen deaeration screw on the side of the brake body and
the main brake piston.
- Inject into the system until the fl uid begins to fl ow from the deaeration screw without air bubbles.
- Tighten deaeration screw, as the fl uid in the system still has to be under pressure!
Repeat procedure for second wheel.
Pull the lever. If the stroke does not correspond to the data written in the next paragraph, repeat whole procedure
again.
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