15. Figure 74–4 The flange on the backing plate is designed to come close to a notch or groove on the brake drum, forming a type of seal that helps prevent debris and water from getting onto the drum brake. Continued
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17. Figure 74–5 A keystone anchor allows the brake shoes to self-center in the drum. Continued
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19. Figure 74–6 Piston stops prevent the wheel cylinder from coming apart Continued
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22. Figure 74–8 The pushrods are held in place by the rubber dust boots. As the wheel cylinder pistons move outward, the pushrods transfer the movement to the brake shoes. Through pushrods or links, this movement acts on the brake shoes, forcing them outward against the brake drum.
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27. Figure 74–11 Typical drum brake shoe and the names of the parts. (Courtesy of Allied Signal Automotive Aftermarket) Continued
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32. Figure 74–13 Primary shoe lining may vary depending on the application. Continued
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40. Figure 74–17 Typical drum brake lining edge codes. Continued
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43. NOTE: While many brands of replacement brake lining provide acceptable stopping power and long life, purchasing factory brake lining from a dealer is usually the best opportunity to get lining material that meets all vehicle requirements. Aftermarket linings are not required by federal law to meet performance or wear standards that are required of original factory brake linings. Lining wear, fade resistance, tensile strength, heat recovery rate, wet friction, noise, and coefficient of friction must be considered when purchasing high-quality linings. There are no standards that a purchaser can check regarding all of these other considerations. For best brake performance, always purchase the best-quality name-brand linings that you can afford.
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47. Figure 74–20 Various types and styles of hold-down springs. Continued
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57. Figure 74–24 A double-trailing non-servo drum brake. Continued
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59. Figure 74–25 A leading-trailing non-servo drum brake. Continued
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64. Figure 74–27 A dual-servo brake adjusting link. NOTE: Adjusting links generally have specific left- or right-hand threads, and must be installed on the correct side of the vehicle. Continued
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71. Figure 74–30 A cable-actuated starwheel automatic adjuster. This type of adjuster makes the adjustment as the brakes are released. Continued
72. Figure 74–31 A lever-actuated starwheel automatic adjuster. This type of adjuster makes the adjustment as the brakes are applied. Continued
73. Figure 74–32 A link-activated starwheel automatic adjuster. This type of adjuster makes the adjustment as the brakes are released. Continued
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78. Figure 74–35 A non-servo brake with a lever-activated starwheel automatic adjuster on the leading shoe. This type of adjuster makes the adjustment as the brakes are applied. Continued