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S-Cam Brake Maintenance & Troubleshooting Quiz

1.

Brake condition and maintenance are checked by transportation departments at roadside weight stations.

  1. True

  2. False

2.

Performing regular brake service is the first step toward assuring safe vehicle operation.

  1. Replacement

  2. Inspections

  3. Tests

3.

The efficiency and safety of brakes and brake linings are directly related to proper care and maintenance.

  1. True

  2. False

4.

Once the vehicle is raised place under the axles as a safety measure:

  1. Wheel

  2. Cinder Blocks

  3. Jack Stands

  4. Any of the above

5.

When spring brakes are "caged", the spring brake is in the applied position.

  1. True

  2. False

6.

When inspecting brake shoes and linings it is important to pay close attention to wear patterns.

  1. True

  2. False

7.

When you compare the worn shoe linings the top linings should be ____________ to the bottom linings.

  1. Thinner Than

  2. Thicker Than

  3. Equal Thickness to

8.

Thinner bottom shoe linings indicate that the camshaft or camshaft bushings are worn. To remedy this problem the camshaft and bushings should be _________.

  1. Checked against tolerance

  2. Replaced

  3. Adjusted

9.

If the wear of the lining is tapered (thick on one side and thinner on the other side) you may have bent the spider.

  1. True

  2. False

10.

Drums with heat cracks, grooves or rounded corners at the back or front of the brake face always indicate a need for brake drum replacement or machining.

  1. True

  2. False

11.

Camshaft bushings should be changed every time a brake reline is performed.

  1. True

  2. False

12.

Worn anchor pins and bushings should be replaced as a unit

  1. True

  2. False

13.

Excessive spline wear between the cam shaft and slack adjuster will limit push rod travel.

  1. True

  2. False

14.

The slack adjuster enables the mechanic to maintain proper __________.

  1. Brake chamber push-rod stroke

  2. Lining to drum clearance

  3. Both A & B

15.

Check slack adjuster length by measuring from the center of the camshaft to the center of the clevis pin hole.

  1. True

  2. False

16.

Brake chambers convert air _____________ into mechanical _____________.

  1. Pressure/Force

  2. Systems/Pressure

  3. Chambers/Systems

17.

Brake chamber springs should be able to return the camshaft to the release position.

  1. True

  2. False

18.

To loosen the wear ring for removal. You should use a _____________.

  1. Ball Peen Hammer

  2. Screwdriver

  3. Chisel

19.

When inspecting the axle spindle, you should pay careful attention to the surface where the oil sealing lip runs.

  1. True

  2. False

20.

What should you do if you have a flat spot on the S-cam face?

  1. Grind surface smooth

  2. Replace cam shaft

  3. Do nothing

21.

Most brake linings are designed to perform equally well under a wide range of operating conditions.

  1. True

  2. False

22.

When selecting replacement brake shoe linings you should consider ___________.

  1. Type of carrier

  2. Operating terrain and conditions

  3. Load weights per axle

  4. All of the above

23.

Haldex's "MA Series" is a double diaphragm spring brake.

  1. True

  2. False

24.

Maximum adjustable stroke is determined by consulting manufacturer specs for each type of brake.

  1. True

  2. False

25.

When setting the maximum adjustable stroke for the slack adjuster you should use a square to mark the rod before you cut it.

  1. True

  2. False

26.

When installing regular brake shoes use a _____________ to see if the anchor pin hole allows for the proper shoe alignment.

  1. True

  2. False

27.

A ______________ is used to determine if a brake shoe has the proper arc or if it has been stretched.

  1. Go-no-go gauge

  2. Brake shoe stretch gauge

  3. Feeler gauge

28.

With the center of the shoe making full contact with the drum, a shoe with the correct arc and fit should show 8 to 10 thousandths of-an-inch clearance at the cam and anchor ends.

  1. True

  2. False

29.

It is not necessary to install new brake springs every time you replace brake linings

  1. True

  2. False

30.

Weak brake springs can cause:

  1. Noise problems

  2. Shortened lining life

  3. Imbalanced braking

  4. All of the above

31.

When you check shoe alignment by placing a square over the brake shoe and the machined surface at the end of the axle you can determine if the spider is bent

  1. True

  2. False

32.

Rotating the cam shaft so that the rollers are setting in the lowest point on the cam head puts the brakes in the engaged position.

  1. True

  2. False

33.

Wheel bearings should be cleaned, inspected and lubricated with a light coat of oil before installing the wheel hub assembly.

  1. True

  2. False

34.

Correct alignment of the wheel hub with the axle prevents damage to the oil seal.

  1. True

  2. False

35.

When reusing the old hub cap check the _____ _____ in the filler plug to be sure it is open

  1. Cap/center

  2. Vent/hole

  3. Plug/diameter

  4. None of the above

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