Aircraft Technical Manual
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
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6.41 Brake Master Cylinder (all J-Series)
6.41.1 Description
The brake master cylinder is located either inside the centre console between the seats or on the
front of the main longitudinal beam.
In all models it is actuated by applying rearward pressure to the brake handle.
A small reservoir is incorporated into the master cylinder for the fluid supply.
6.41.2 Brake Master Cylinder Removal & Installation (Inside Centre Console)
Screw drivers
Drill
Spanners / Socket Wrench
L2 or LAME (A&P or LSA Repairman / Maintenance)
L2 or LAME (A&P or LSA Repairman / Maintenance)
The following procedure applies to brake cylinder installations inside the centre console, between the
seats:
1. Remove the flexible hose from one wheel brake assembly and drain the fluid from the brake
system.
2. Drill the rivets holding the master cylinder bracket to the centre console (while it is possible to
remove the cylinder from the bracket in-situ it is much more difficult due to the limited access. It
is generally faster to drill the rivets the replace them during re-installation.)
3. Place a rag under the cylinder to catch any drips of brake fluid.
4. Disconnect flexible hose at master cylinder.
5. Remove the cylinder and mounting bracket assembly from the console and unbolt the master
cylinder retaining bolts.
6. Plug or cap hydraulic fittings and hoses to prevent the entry of foreign material.
7. Reverse the preceding steps to install brake master cylinder, then fill and bleed brake system in
accordance with Section 6.46.
6.41.3 Brake Master Cylinder Removal & Installation (On the front of Centre Console)
Screw drivers
Spanners / Socket Wrench
L2 or LAME (A&P or LSA Repairman / Maintenance)
L2 or LAME (A&P or LSA Repairman / Maintenance)
The following procedure applies to brake cylinder installations on the front of the centre console:
8. Remove the flexible hose from one wheel brake assembly and drain the fluid from the brake
system.
9. Unbolt & remove brake handle.
10. Disconnect flexible hose at master cylinder.
11. Unbolt master cylinder retaining bolts.
12. Plug or cap hydraulic fittings and hoses to prevent the entry of foreign material.
13. Reverse the preceding steps to install brake master cylinder, then fill and bleed brake system in
accordance with Section 6.46.