THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
3 - 6
Effective: 01/01/08
An alternative method of bleeding the
brakes is as follows:
1. Place a large clean container under
the master brake cylinder and uncap
the hydraulic fluid reservoir.
2. Bleed the outlet hose of a “pressure
pot” full of MIL-H-5606 “red” hydraulic
fluid until a steady stream of hydraulic
fluid comes out.
3. Place this outlet hose over a bleeder
valve and then open the bleeder
valve.
4. Open the pressure pot valve and
force hydraulic fluid through the
caliper and up the brake lines to the
master cylinder.
5. Force at least a pint of hydraulic fluid
through the brake lines into the
master cylinder reservoir, allowing it
to overflow.
6. Close the bleeder valve and connect
the pressure pot line to the other
bleeder valve.
7. Open the bleeder valve and force
another few fluid ounces of hydraulic
fluid back to the master cylinder.
8. Close the bleeder valve and clean off
the brake master cylinder and
dispose of the flushed hydraulic fluid
properly. Be sure to replace the
reservoir cap before releasing the
airplane.
PARKING BRAKES
Ref. Fig. 3-2
Parking brakes are actuated by
depressing the brake pedals as normal
and then locking the pressure in the
brake system downstream of the master
cylinders.
Parking brakes are only for temporary
parking. Any leaks or seepage of
hydraulic fluid from the brake system or
slippage of the master cylinder plunger
will slowly release the parking brake. If
the airplane is being parked for more
than 4 hours it should be tied down.
Operate the individual parking brakes as
follows:
ON – Depress rudder pedal, pull parking
valve lever, take pressure off of rudder
pedal.
OFF – Depress rudder pedal, valve will
deactivate and lever will pop in.
