brake shoes

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BRAKE SHOES. PURPOSE. Provide reliable stopping power with high temperature friction materials to stop or slow the vehicle. CONSTRUCTION. Steel ‘shoe’ has high temperature friction material attached by either bonding or riveting. - PowerPoint PPT Presentation

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Page 1: BRAKE SHOES
Page 2: BRAKE SHOES

BRAKE SHOESBRAKE SHOES

Page 3: BRAKE SHOES

PURPOSEPURPOSE

Provide reliable stopping power with Provide reliable stopping power with high temperature friction materials high temperature friction materials to stop or slow the vehicle.to stop or slow the vehicle.

Page 4: BRAKE SHOES
Page 5: BRAKE SHOES
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CONSTRUCTIONCONSTRUCTION

Steel ‘shoe’ has high temperature Steel ‘shoe’ has high temperature friction material attached by either friction material attached by either bonding or riveting.bonding or riveting.

One shoe has lining which is longer One shoe has lining which is longer than the other. This is called the than the other. This is called the secondary shoe. The shorter one is secondary shoe. The shorter one is called the primary shoe.called the primary shoe.

Page 7: BRAKE SHOES
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LOCATIONLOCATION

2 brake shoes inside each brake drum.2 brake shoes inside each brake drum. 2 brake drums per axle (left and right).2 brake drums per axle (left and right). The primary (shorter) shoe is the The primary (shorter) shoe is the

forward facing shoe, in relation to the forward facing shoe, in relation to the wheel cylinder.wheel cylinder.

The secondary (longer) shoe is placed The secondary (longer) shoe is placed behind the wheel cylinder.behind the wheel cylinder.

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PROBLEMSPROBLEMS

Wear and over heating reduce brake Wear and over heating reduce brake effectiveness.effectiveness.

Worn brake shoes will cause a low Worn brake shoes will cause a low brake pedal if not kept properly brake pedal if not kept properly adjusted.adjusted.

Noises caused by dust, worn shoes, Noises caused by dust, worn shoes, loose rivets all require visual inspection loose rivets all require visual inspection to determine required repairs. to determine required repairs.

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DIAGNOSISDIAGNOSIS

Visual inspection is required for Visual inspection is required for determining what parts are required.determining what parts are required.

A test drive should be done first.A test drive should be done first. Shoes worn unevenly, to the rivets or Shoes worn unevenly, to the rivets or

steel, cracked or oil soaked should be steel, cracked or oil soaked should be replaced. replaced.

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APPROXIMATE COST OF REPAIRAPPROXIMATE COST OF REPAIR

Depending on vehicle design, (car, van, Depending on vehicle design, (car, van, light or heavy duty truck, etc…) and light or heavy duty truck, etc…) and quality desired, shoes range from $25 to quality desired, shoes range from $25 to over $200, 1-2 hours labour.over $200, 1-2 hours labour.

Shoes come in sets of four to do both Shoes come in sets of four to do both sides.sides.

The hold down springs should be replaced The hold down springs should be replaced at the same time.at the same time.

Other worn or damaged parts should be Other worn or damaged parts should be replaced also.replaced also.