Brake chamber stroke chart

Make a psi brake application and allow the chamber push rod to travel its maximum stroke. Check the chart on the second page for proper maximum stroke after adjustment of the brakes. Measuring the Free Stroke 4. Many long stroke brake chambers have identification and service data stampe cast or embossed onto the metal parts of a brake chamber.

Others are provided with an adhesive data label. If a brake chamber stroke exceeds the brake adjustment limit on the chart , notify Apparatus Maintenance to have corrective actions taken.

A brake stroke chart is shown below with common chamber sizes in our fleet. When preparing to install a spring brake chamber , ensure that the unit is fully released (power spring caged) and the service brake push-rod is fully retracted to zero stroke position. Thread the clevis jam nut onto the push-rod B. Place the brake chamber into the appropriate brake assembly bracket. Set at ¼” Chamber face to center of large clevis pin Template not available!

Note: Chambers must be caged to set up distance! Defi nition In this diagram, the brakes have been applied and the brake linings have contacted the brake drum. Service Chamber Brakes Tthrough T20. Any brake stroke exceeding the readjustment limit will be rejected. Despite what you may think, the 2-inch stroke limit on a standard Type-brake chamber isn’t arbitrary.

With a Type-chamber , 0. For this reason, standard and 3-inch long- stroke chambers should never be installed on the same axle. For example, a Type brake chamber has a square inch effective area diaphragm size. An air brake chamber is measured by locating size markings on the brake chamber or by measuring the diameter of the clamp holding the chamber together. BENDIX BRAKE CHAMBERS Manual.

Long stroke and regular stroke brake chambers Many new air brake systems are equipped with long stroke brake chambers. As the name implies, a long stroke chamber design has a longer pushrod stroke than the pushrod of a standard brake chamber. Long stroke brake chambers can usually be identified by square-shaped inlet ports or a nametag on a. When you are selecting an ASA, make sure that the chamber size corresponds to the ASA part number.

Note: ASA selection for air disc brakes is slightly different that for drum brakes. Please pay attention to the ADB notations in the parts catalogs and. A standard rated stroke for the air brake actuator size is then assumed unless a marking is found on the air brake actuator or ID tag that indicates a different rated stroke.

Using the determined rated stroke and chamber size, a chart is referenced to provide the brake adjustment limit. Release the brakes and observe that the push rods return to the released position promptly and without binding. From your info, you had a 2. Install the canister with the spring brake caged.

Product Catalog and Cross Reference. Excessive leakage elsewhere in the air brake supply system. Inadequate reservoir volume - high air demand. Leaking tubing or hose line.

The shoes are not applied. Make a 1psi application to the service brakes and measure the push rod stroke. Determine the brake chamber size. Using the chart (Fig.

3) compare the actual chamber stroke to the recommended maximum stroke to determine if brake adjustment is required. WABCO offers a cost attractive, high performance product for the truck and trailer segments. ANCHORLOK LONG STROKE SPRING BRAKES PART No. Installation and Adjustment Procedures for Meritor Automatic. If the air brake chamber push rod stroke is within limits during operation, no adjustment occurs.

Large inventory of aftermarket parts from Haldex at low prices. Make an psi brake application and allow the air chamber push rod to travel its maximum stroke. Check the following chart , Figure for proper maximum stroke after the adjustment of the brakes. Once you have taken this measurement, make an psi brake application and allow the air chamber push rod to travel its maximum stroke. For each brake chamber type having a full stroke at least as great as the first number in Column of Table V, but no more than the second number in Column of Table V, the volume of each brake chamber for purposes of calculating the required combined service and supply reservoir volume shall be either that specified in Column of Table V or.

Search in Document Library for: Search. On different brake chambers , for example, on the front theses are smaller brake chambers. This publication provides maintenance and service procedures for Meritor’s air disc brakes. You must understand all procedures and instructions before you begin maintenance and service procedures. Apply the air brakes fully, minimum air pressure of psi, and measure the distance the push rod travels from the face of the chamber to the mark previously made when the brakes were released.

Brake checks are now a one man job! This measurement is the push-rod stroke (See Table). A process where brake lining surface and brake drum surface are conditioned after reline. I am trying to find a replacement bolt type air brake chamber used on an older railroad motorcar.

Does anyone know if parts for these are available anymore. Replacing it with a newer clamp type chamber will require fabing up a bracket. This stroke is shown by the maximum stroke indicator located on the air chamber pushrod.

Maximum allowable stroke is achieved when the indicator is fully extended from the air chamber housing.