![background image](http://html1.mh-extra.com/html/jabiru/j120/j120_technical-manual_3130523108.webp)
Aircraft Service Manual
Jabiru Aircraft
Pty Ltd
JTM001-1
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
REVISION
1
Dated: Nov 2011
Issued By: SW
Page: 108 of 233
8.18 HYDRAULIC BRAKE LINES
8.18.1 DESCRIPTION
Jabiru Aircraft use flexible black nylon brake hoses. On most models they are connected to the
master cylinder via a tee-piece
– typically located in the main undercarriage channel under the belly
of the aircraft.
8.18.2 REMOVAL REPAIR & INSTALLATION
Repair is limited to replacement.
8.19 WHEEL BRAKES
8.19.1 DESCRIPTION
The Wheel Brake Assemblies consist of a disc which is attached to the main wheel hub with through-
bolts and a floating brake caliper assembly.
Depending on model there may be 1 or 2 calipers fitted to each wheel.
Older aircraft use a slightly different caliper as shown in Figure 76. Maintenance, inspection & repair
of this system is the same as for later variants.
8.19.2 REMOVAL
To remove from the wheel, unbolt the brake cylinder from the backing plate.
To remove from the aircraft, disconnect the brake line. Use a container to collect the brake fluid
draining from the system.
The brake disc is removed after the wheel is removed and disassembled.
8.19.3 WHEEL BRAKE INSPECTION AND REPAIR
1.
Clean all parts except brake linings in dry cleaning solvent and dry thoroughly.
2.
New piston sealing O-Rings should be installed each time the brakes are disassembled. If re-use
is necessary, they should be wiped with a clean cloth saturated in automotive brake fluid and
inspected for damage.
NOTE: Thorough cleaning is important. Dirt and chips are the greatest single cause of
malfunctions and leaks in hydraulic brake systems.
3.
Check brake linings for deterioration or excessive wear.
4.
Inspect brake cylinder bore for scoring. A scored cylinder will leak or cause rapid seal wear. If
wear is evident, install a new brake cylinder.
5.
If the anchor bolts on the brake assembly are nicked or gouged, replace with new bolts.
8.19.4 WHEEL BRAKE INSTALLATION
1.
Place brake calliper assembly in position on backing plate.
2.
Install bolts, springs, outboard pad and nuts/washers.
3.
Reconnect flexible hose.
4.
Visually inspect. Ensure there is clearance between the brake components and the tyre.
5.
Fill master cylinder reservoir with brake fluid.
6.
Bleed brakes
– Refer to Section 8.22.