Hydraulic Drum Brake Systems Parts Technician First Period Material Identification and Calculations l

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 1 - Brake drum.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 2 - Complete drum brake system.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 3 - Heel and toe of a brake shoe.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 4 - Energized and non-energized shoes.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 5 - Brake shoe arrangements.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 6 - Dual-servo brake assembly.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 7 - Dual-servo brakes are self-energizing.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 8 - Secondary linings receive the greatest force and do most of the braking.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 9 - Primary linings and secondary linings.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 10 - A leading-trailing brake assembly.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 11 - Leading and trailing shoe energization in forward and reverse.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 12 - The backing plate.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 13 - A labyrinth seal on a drum brake system.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 14 - Contact pads on the backing plate.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 15 - Brake shoe construction.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 16 - The T shape of the shoe.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 17 - Riveted brake linings and bonded brake linings.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 18 - Melted resins and gases between the lining and the drum.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 19 - Exploded view of a wheel cylinder.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 20 - Cup expanders.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 21 - Double-ended wheel cylinder.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 22 - Single-acting wheel cylinder.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 23 - Brake shoe hold-down hardware.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 24 - Return springs.

© 2013, Her Majesty the Queen in right of the Province of Alberta Table 1 - Additional brake springs.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 25 - Self-adjuster.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 26 - Cable type self-adjuster.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 27 - Self-adjuster operation when the vehicle is backing up.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 28 - A leading-trailing self-adjuster.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 29 - Exploded view of drum brake components.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 30 - Four types of drum construction.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 31 - A fixed drum and a floating drum.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 32 - Annular and radial cooling fins.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 33 - Balanced drums.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 34 - Maximum diameter marking.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 35 - Examples of brake drum/shoe lining wear. (Courtesy Motor Information Systems)

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 36 - Using a drum gauge to check drum diameter.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 37 - A park brake foot pedal and a park brake hand lever.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 38 - Graphic symbols used for park brake and brake warning.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 39 - A complete park brake set-up. (Courtesy Honda Canada Inc.)

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 40 - Park brake cable construction.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 41 - Park brake components at the wheel.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 42 - Park brake arrangement.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 43 - Dual-servo park brake operation.

© 2013, Her Majesty the Queen in right of the Province of Alberta Table 2 - Common replacement components and related sales.

© 2013, Her Majesty the Queen in right of the Province of Alberta Figure 44