21. Each piston has a rubber seal and a shaft that connects the piston with a brake shoe . 22. "The thing is, brake shoes , brake pads, spark plugs, gaskets _ they can't get wet, " he said. 23. Firefighters said the problem of brake shoes overheating had happened before and would be difficult to eliminate entirely. 24. The brake shoes first contact the high spot, then need to move out to touch the low spot. 25. This in turn applies pressure on one of the brake shoes which comes into contact with the brake drum. 26. Brake failure is also caused by brake drum thermal expansion in which brake shoe clearance becomes excessive from wear. 27. It is also used as insulation and as an asbestos substitute in brake shoes and firewall liners in vehicles. 28. Honeywell's Transportation Systems division also carries the Bendix line of brake shoes , pads and other vacuum or hydraulic subsystems. 29. To accommodate the bigger wheels, special brake pads had to be manufactured for the brake shoes on 24049 and 24050. 30. Wooden brake shoes perform well, but if subjected to numerous high-speed applications they develop a carbon film that diminishes brake performance.
