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NOTE 3 : For aircraft equipped with dual-control disk brakes, start the brake system bleeding with the R.H. front seat control, then continue with the pilot seat control according to the procedure below.
1) Check clearances of L.H. and R.H. rudder pedals. Adjust, if necessary (use the threaded part of the master cylinders).
NOTE : Adjust the final clearance at the end of the operation.
2) Install wheel chocks.
3) Remove engine cowling 121 - refer to 71-10-01.
4) Remove the caps from bleed screws (3).
5) Clean bleed screws (3).
6) Check the hydraulic fluid level in hydraulic fluid reservoir (1).
7) Connect bleeding vinyl hoses (4) to bleed screws (3).
8) Install drip pans (5).
9) Unscrew bleed screws (3) by 1 to 2 turns.
10) Slowly and simultaneously compress then release L.H. and R.H. master cylinders (2).
NOTE : It is important to slowly compress then release master cylinders (2) to allow removal of air bubbles.
11) During the first actions, make sure, especially if master cylinders (2) have been replaced, that the thrust rods come back to their initial position.
12) Repeat operation 10), while also operating the parking brake valve, until the air bubbles in vinyl hoses (4) have completely disappeared.
13) Once all air bubbles have disappeared, compress L.H. and R.H. master cylinders (2) and, while still pushing on the brake pedals, tighten bleed screws (3).
14) Remove vinyl hoses (4) and remove drip pans (5).
15) Install the caps on bleed screws (3).
16) Fill reservoir (1) with new hydraulic fluid (TB 02-001) - refer to Paragraph 1.
17) Permanently adjust the clearance of the L.H. and R.H. rudder pedals (use the threaded part of the master cylinders). Minimum pedal clearance : 0.19 in (5 mm). This clearance corresponds to the gap left between the master cylinder piston and the lever roller. This gap is necessary in case of temperature changes - see Detail A.
18) Perform a braking test and check for leaks.
NOTE : Do not apply the parking brake when linings are warm as this may lead to blocking.
19) Make sure all the tools and materials are removed and the work area is clean and free from debris.
20) Install engine cowling 121 - refer to 71-10-01.
ABAA
Validity : S / N 1 - 9999 12 13-01Page 303
(CA) JUN 02
Brake system bleeding with a hand pump
Figure 301
ABAA
Validity : S / N 1 - 9999 12-13-01Page 304
(CA) JUN 02
1 - Reservoir
2 - Master cylinder
3 - Bleed screw
4 - Vinyl hose
5 - Drip pan
ABAA
Validity : S / N 1 - 9999 12 13-01Page 305
(CA) JUN 02
PAGE INTENTIONALLY LEFT BLANK
BRAKE HYDRAULIC SYSTEM DRAINAGE
SERVICING
1. BRAKE HYDRAULIC SYSTEM DRAINAGE (Figure 301)
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