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Investors Relations & Haldex information

S-Cam Brake Maintenance & Troubleshooting Quiz


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

  1. True

  2. False


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

  1. Replacement

  2. Inspections

  3. Tests


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

  1. True

  2. False


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


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

  1. True

  2. False


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

  1. True

  2. False


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


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


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


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


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

  1. True

  2. False


Worn anchor pins and bushings should be replaced as a unit

  1. True

  2. False


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

  1. True

  2. False


The slack adjuster enables the mechanic to maintain proper __________.

  1. Brake chamber push-rod stroke

  2. Lining to drum clearance

  3. Both A & B


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

  1. True

  2. False


Brake chambers convert air _____________ into mechanical _____________.

  1. Pressure/Force

  2. Systems/Pressure

  3. Chambers/Systems


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

  1. True

  2. False


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

  1. Ball Peen Hammer

  2. Screwdriver

  3. Chisel


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

  1. True

  2. False


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


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

  1. True

  2. False


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


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

  1. True

  2. False


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

  1. True

  2. False


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


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

  1. True

  2. False


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


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


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

  1. True

  2. False


Weak brake springs can cause:

  1. Noise problems

  2. Shortened lining life

  3. Imbalanced braking

  4. All of the above


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


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


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

  1. True

  2. False


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

  1. True

  2. False


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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