How do I identify a Meritor slack adjuster?

Meritor uses a mylar tag on the body of the current-design slack adjuster to identify the color of the internal actuator piston. A color-coded tie wrap was used on previous-design slack adjusters. An assembly number is located on the side of the four-piston QuadraulicTM disc brake caliper.

Do automatic slack adjusters go bad?

This connection can be froze up or worn out showing excessive play, elongated holes and worn out or missing bushings in the slack adjuster clevis pin hole. All these will cause the auto slack adjuster to not maintain proper adjustment.

How do you know if your automatic slack adjuster is bad?

Usually brakes locking up is s-cam or s-cam bushings. That’s fairly easy to check, with no brake pressure put a pry bar on the slack adjuster. If there’s any significant movement up down or back and forth (some in and out is fine) then everything needs to come apart.

How does a Meritor slack adjuster work?

When linings wear, this clearance increases, and the air chamber push rod must travel farther to apply the brakes. When this happens, the slack adjuster will automatically adjust during the return stroke to maintain the correct shoe-to-drum clearance.

How do I know if my slack adjuster is bad?

What’s the difference between manual and automatic slack adjusters?

Automatic slack adjusters perform the same function as the manual slack adjuster, except that it automatically adjusts for lining wear. It does not require periodic manual adjustment, however the slack adjuster does provide for manual adjustment if necessary.

How often should you adjust automatic slack adjusters?

Normally two to four brake applications of 100 psi (689 kPa) per day will keep the brakes properly adjusted. If they are badly out of adjustment it may take up to 12 brake applications of 100 psi (690 kPa) to adjust them. If they are still out of adjustment a qualified person should repair them.

When should slack adjusters be replaced?

That’s fairly easy to check, with no brake pressure put a pry bar on the slack adjuster. If there’s any significant movement up down or back and forth (some in and out is fine) then everything needs to come apart.

Do you need to manually adjust a Meritor slack adjuster?

Meritor automatic slack adjusters (ASAs) should not need to be manually adjusted in service. ASAs should not have to be adjusted to correct excessive push rod stroke. The excessive stroke may be an indication that a problem exists with the foundation brake, ASA, brake actuator or other system components.

Why do you need an automatic slack adjuster?

Automatic slack adjusters (ASA) for on-highway, linehaul and vocational applications deliver shorter stopping distances and offer longer lining life. Built to be robust and reliable, the industry’s lightest-weight automatic slack adjuster optimizes brake performance by increasing payload capacity and enhancing camshaft bracket life.

Is the Meritor office closed on July 4?

All Meritor offices will be closed July 4, 2018 in observation of the holiday. Automatic slack adjusters (ASA) for on-highway, linehaul and vocational applications deliver shorter stopping distances and offer longer lining life.