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BRAKE SYSTEMS
Goodyear Master Cylinder

Aviation Structural Mechanic (H&S) 3&2 - How airplanes are built and how to maintain them
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Figure 12-22.-Typical independent-type brake system. to the fluid line, which is connected to the brake assembly in the wheel. This action results in the friction necessary to stop the wheel. When the brake pedal is released, the master cylinder piston is returned to the OFF position by a return spring. Fluid that was moved into the brake assembly is then pushed back to the master cylinder by a piston in the brake assembly. The brake assembly piston is returned to the OFF position by a return spring in the brake. The typical master cylinder has a compensating port or valve that permits fluid to flow from the brake chamber back to the reservoir when excessive pressure is developed in the brake line due to temperature changes. This feature ensures against dragging or locked brakes. Various manufacturers have designed master cylinders for use on aircraft. All are similar in operation, differing only in minor details and construction. Two types of master cylinders, the Goodyear and the Gladden, are described and illustrated in this section. 12-29







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