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Aircraft Technical Manual
Jabiru Aircraft
Pty Ltd
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
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ISSUE
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Dated: 29th October 2014
Issued By: AS
Page: 137 of 298
6.46 Brake System Bleeding (all J-Series)
Required Tools:
Spanners / Socket wrench
Parts and Material:
Automotive brake fluid
Type of Maintenance:
Line Maintenance
Level of Certification:
L1, L2 or LAME (Owner, A&P or LSA Repairman / Maintenance)
Return to Service:
L1, L2 or LAME (Owner, A&P or LSA Repairman / Maintenance)
1.
Fill the brake master cylinder with automotive brake fluid.
2.
Loosen the bleed nipple at the brake cylinder.
3.
Pull the handbrake back to the rear stop & hold in same position until nipple has been tightened.
Release the hand brake & repeat step 3 until all air is expelled from lines.
NOTE: Ensure brake master cylinder remains full above the outlet hose.
4.
The brake callipers have been designed so that when they are in their installed position on the
aircraft any air bubbles will naturally move towards the bleed nipple outlet. However, for dual
brake systems there is potential for air bubbles to be caught at the T-piece in the line near the
wheel. If you are having difficulty bleeding a dual calliper brake system try removing both
callipers from the aircraft temporarily and holding 1 calliper abov
e the “T”. Also ensure that the
“T” is rotated. Leave the assembly in this position for 5 – 10 minutes to allow any air bubbles to
make their way into the high calliper then re-assemble and bleed as normal.
5.
When air is fully expelled, tighten bleed nipples & check fittings for leaks.
6.
Repeat steps 1-4 for other side brake.
WARNING
Use only automotive brake fluid. DO NOT use aircraft hydraulic fluid or damage will result.
6.47 Brake Pad Adjustment (all J-Series)
Required Tools:
Tools as required by Section 6.28
Parts and Material:
N/A
Type of Maintenance:
Line Maintenance
Level of Certification:
L1, L2 or LAME (Owner, A&P or LSA Repairman / Maintenance)
Return to Service:
L1, L2 or LAME (Owner, A&P or LSA Repairman / Maintenance)
Brake Pads may be adjusted by removing the wheel spats as described in Section 6.28 above.
Tightening the brake pads onto the disc with the attaching bolts until the wheel cannot be turned and
the brake pistons have been pushed fully back into the calipers.
Loosening off the attaching bolts just until the wheel can be rotated freely.
If the springs are found to be binding they may be shortened slightly.
Visually inspect the fit of the pads against the discs. If one side pad is rubbing and the other free or if
the pads are sitting at an angle to the disc it is necessary to adjust the caliper mounting plate.
The caliper mounting plate can be adjusted by carefully bending it. Ensure that soft-jaws or similar
are used to ensure that the plate is not marked or damaged. Do not bend the plate sharply or
repeatedly. The aim is to have the brake pads aligning with the disc and with the disc centred so that
when the brakes are OFF, both pads are slightly clear of the disc. Carrying out this process carefully
will give optimum brake performance and life.
WARNING
The mark III brake assembly (single calliper, dual cylinder) has been designed such that
adjustment is not necessary or even possible. DO NOT attempt to adjust mark III brakes if these
are fitted to the aircraft, damage may result.