Game Composites GB1 GameBird, Руководство по обслуживанию

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Maintenance Manual GB1 GameBird
Page date: April 24, 2020
32-9
Brake Calipers
Type: 33-8M
Manufacturer: Grove Aircraft
1800 Joe Crosson Drive, El Cajon, CA 92020, USA
www.groveaircraft.com
The brake calipers can be inspected, maintained and repaired without raising the aircraft or removing the
wheel. Removal of the wheel is not necessary unless the torque plate is to be removed. Disassembly should be
done on a clean, cushioned flat surface to prevent nicks, scratches, and gouges to the brake.
Remove:
1. Remove the rear landing gear fairings per section 32-02
2. Drain the fluid from the brake system by opening the bleeder fitting and pumping the brake pedal until
the system is dry. Collect the discharged fluid and dispose of properly.
3. Disconnect brake line from brake caliper.
Cap brake line to prevent foreign material to enter.
4. Remove back plate
5. Remove the piston from the caliper body. This can be done by injecting compressed air through the
brake line fitting, cover the piston and caliper with a rag and/or place face down on a soft surface.
CAUTION: Care must be taken to ensure that the piston does not exit at high velocity!
6. Remove the O-Ring from the piston. It is recommended that new O-Rings be installed.
If the old O-Rings are to be re-used, care must be taken to ensure that they are not damaged during
removal or re-installation.
If the O-Ring is brittle, nicked, scratched or has flat surfaces, it must be replaced.
CAUTION: Use only approved O-Rings that are compatible with aircraft brake fluid!
7. If removal of the torque plate is required, remove torque plate, and wheel
Inspection and Repair:
1 Visually inspect cylinder for cracks, nick, corrosion, or other damage.
Cracks around the torque pins will cause replacement.
2 Inspect the caliper torque pins for excessive wear, proper tightness, cracks in the caliper body or other
damage. Cracks in caliper body or loose torque pins will cause replacement.
3 Inspect the piston bore and piston for contamination, corrosion and scratches. Light nicks and
scratches can be removed by polishing. Care must be taken not to damage the protective coating
which will result in increased corrosion. Deep nicks or scratches will cause replacement.
4 Inspect back plate and press plate for excessive corrosion, visible damage, or excessive warpage which
is cause for rejection of the part. Straighten or replace press plate if warpe
d in excess of 0.010”.
5 Inspect the torque plate for corrosion and cracks. Excessive corrosion or cracks will cause replacement.
Reinstall:
1. Clean the brake parts, with the exception of the O-Rings and linings, in solvent and air dry.
2. Carefully install a new O-Ring, or serviceable O-Ring, on the piston using aircraft hydraulic fluid, Dow
55M O-Ring Lubricant or equivalent.
3. Lightly coat the piston bore with aircraft hydraulic fluid, Dow 55M O-Ring Lubricant or equivalent, and
carefully place the piston into the caliper. The side of the piston with the O-ring closest to the surface
goes in first. Insert it until the top of the piston is flush with the caliper body.
4. Slide the caliper assembly onto the torque plate on the aircraft.
5. Install the back plate, torque the back-plate bolts with 70’’/ lbs. and safety-wire.
6. Reconnect the brake lines, bleed the brake system.
7. If the torque plate was removed, reinstall in its original, clocked position.
Signature
8. Check for correct installation