T4 A2 Task 3

1.

1 point

How are automatic slack adjusters adjusted?

Tighten until brakes drag then back off until wheel turns freely

Using shims and a dial indicator, set s-cam end play to .005"

Follow manufacture procedures as they may vary

Torque adjusting hex with torque wrench

2.

1 point

What are the two types of slack adjusters?

Stroke sensing

Gunite

Disc brake adjsuters

S-cam adjusters

Meritor

Clearance sensing

3.

1 point

How are manual slack adjusters adjusted?

Following manufactures procedures as they may vary

Tighten until brakes drag then back off until wheel turns freely

Using shims and a dial indicator, set s-cam end play to .005"

Torque adjusting hex with torque wrench

4.

1 point

When are automatic slack adjusters adjusted?

During scheduled preventative maintenance

Every 6 months

During installation

Never

5.

1 point

Technician A says a slack adjuster should be adjusted as short as possible without the brakes dragging.

Technician B says when the brakes are applied the slack adjuster should form a 90 degree angle. Who is correct?

Technician A only

Technician B only

Both A and B

Neither A or B

6.

1 point

Technician A says automatic slack adjusters improve brake balance and reduce downtime and maintenance costs.

Technician B says manual slack adjusters provide reduced chamber travel and less air consumption. Who is right?

Technician A only

Technician B only

Both A and B

Neither A or B

7.

1 point

Select the following statements that describe how to diagnose a automatic slack adjuster.

Check the torque of the internal clutch

Adjust the brake to force the lining against the drum

No resistance means the slack adjuster is defective

As contact is made resistance should be felt in the wrench or ratchet

Check the free stroke

Check the applied stroke

8.

1 point

Select the following true statements for diagnosing a manual slack adjuster.

Check the applied stroke

Check the free stroke

Use a torque wrench to check the internal clutch

No resistance means the slack adjuster is defective

As contact is made resistance should be felt in the wrench or ratchet

Adjust the brake adjuster to force the lining against the drum

9.

1 point

Technician A says that when adjusting a manual slack adjuster, if there is little or no pressure on the wrench once the shoes make contact with the drum, the adjustment mechanism is broken and the slack adjuster should be replaced.

Technician B says if the adjustment mechanism is broken, the slack adjuster can be rebuilt. Who is correct?

Technician A only

Technician B only

Both A and B

Neither A or B

10.

1 point

How much free movement should exist between a slack adjuster and its camshaft?

.020"

.010"

.015"

.005"

11.

1 point

Other than the slack adjuster, what else must be inspected for wear?

Camshaft splines

Brake lines and hoses

Brake chamber

Brake spider

12.

1 point

A slack adjuster essentially functions as a:

Lever

Anchor

Gear

Servo

13.

1 point

When inspecting a slack adjuster and both the free and applied stroke are found to be out of specification, what could be the problem?

Brake chamber

Slack adjuster

Air compressor

Dual foot control valve

Foundation brakes

14.

1 point

What are the general procedures most manufactures recommend for testing an automatic slack adjuster?

Testing the internal clutch using a torque wrench

Grease the slack adjuster

Check clevis pins for wear

S-cam free play

15.

1 point

In the 'AL' factor, the 'L' refers to the:

Lining's friction code

Length of slack adjuster

Type of front-brake limiting valve

Thickness of lining