How do I identify my slack adjuster?

TSE Automatic Slack Adjusters (ASA) and Self- setting Automatic Slack adjusters (S-ASA) are identified by the part number which is marked on the cover plate. After a long life in service or while still on the vehicle, it can be difficult to read the information on the cover plate.

Can you check slack adjusters?

How can you check the slack adjuster? Park on level ground, turn off parking brakes, pull hard on each slack adjuster. It shouldn’t move more than one inch.

How do you tell the difference between manual and automatic slack adjusters?

Automatic slack adjusters have an adjusting mechanism that adjusts for brake lining wear. However, manual slack adjuster periodically needs to be adjusted to properly function and operate at peak performance and compensate for lining wear.

How do you check slack adjusters on free play?

Free Play and Brake Stroke Use a tool such as a small pry bar to move the slack adjuster and check the brake’s free play – how far the center of the large clevis pin moves before the brake shoes come in contact with the drum. Free play should be between 3/8 and 5/8 of an inch.

How many different types of slack adjusters are there?

two types
There are two types of slack adjusters: the stroke and clearance adjuster.

How much travel should a slack adjuster have?

Automatic slack adjusters are designed to continuously and automatically maintain the brakes in proper adjustment during normal use. However, they must be checked daily to ensure they are maintaining proper push rod travel – less than one in. (25.4 mm) when manually pulled and less than two in.

How much play should a slack adjuster have?

The shims on the outside of the slack adjuster next to the snap ring are for adjusting “end play,” which should be between . 005- and . 025-inch on the dial indicator. The closer “end play” is to zero, the better, since it will increase as the brake is worn-in over the first month of use.