1/14/2024 0 Comments Slack adjuster on semi![]() ![]() This will vary depending on the make of the adjuster: On a Bendix Versajust, you’ll find it on the slack adjuster body (casting) on others it’s a hole in the casting. And lubrication is a simple process that generally takes less than one minute per adjuster.īegin by locating the ASA’s grease fitting. The American Trucking Associations’ Technology & Maintenance Council’s (TMC) recommended practice (RP) for greasing ASAs lines up with those interval numbers mentioned earlier: Every six months, 1,800 operating hours, or 50,000 miles, whichever comes first. In addition to impeding performance, by impacting the brake stroke, this condition can put a vehicle out of compliance with stroke regulations. Neglecting this simple bit of maintenance leads to the grease inside an ASA becoming clay-like as it accumulates contaminants and loses its ability to lubricate the slack. It’s not uncommon for Bendix technicians to encounter automatic slack adjusters that haven’t been greased regularly. Both support vehicle safety by maintaining the correct brake stroke and providing optimal stopping performance.” Second, the action of forcing new lubricant into the ASA purges the old grease, along with any contaminants or water that have found their way in. ![]() “First, it protects the adjuster’s internal gear sets, clutches, and other components from premature wear. ![]() “There are two vital purposes to greasing an automatic slack adjuster,” said Keith McComsey, director of marketing and customer solutions, wheel-end. With some basic knowledge and patience, changing these components can be done quickly and easily.This installment of the Bendix Tech Tips series reviews greasing automatic slack adjusters (ASAs), the importance of keeping up with their regular lubrication schedule, and other related wheel-end practices to enhance uptime and safety. During this time, it’s important to pay close attention to how each brake responds during braking maneuvers any unusual behavior should be investigated further.Ĭhanging the slack adjusters on a semi-truck is an essential part of regular maintenance and servicing of the vehicle which helps in ensuring proper working order of brakes thereby providing safe driving conditions. Once all adjustments have been made and all jam nuts have been properly tightened, it’s time for a test drive. It’s important that care be taken throughout this process if too much pressure is applied, it can lead to premature brake failure. This involves loosening both jam nuts and then rotating each one until it reaches its maximum tension setting. Once all worn or damaged parts have been replaced, it’s time to make adjustments to each of the slack adjusters. Any damaged parts should be replaced immediately, as they can cause serious problems with braking performance. It’s important to start by examining each one for signs of wear or damage. Once this has been done, it’s time to begin work on the slack adjusters themselves. The first step to changing the slack adjusters on a semi- truck is to raise and support the trailer securely. Fortunately, changing the slack adjusters on a semi-truck is relatively simple and straightforward. If the slack adjusters are not properly adjusted, it can lead to brake failure, resulting in dangerous driving conditions. The primary purpose of slack adjusters is to keep the brakes on the truck in proper working order. Changing the slack adjusters on a semi-truck is an important part of regular maintenance and servicing of the vehicle. ![]()
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