Operated from the dash, it will hold 85 psi in the brake chamber so the driver can walk around the vehicle to check the stroke.
To make this procedure easier, Bendix recently introduced the SureStroke Indicator, a “visual indicator of brake-stroke travel that allows the operator to quickly determine if air brakes are adjusted correctly.” By helping to identify problems such as worn, seized or incorrectly installed slack adjusters, the indicator can also help determine whether the ASA is at fault when the stroke isn't right, or whether the brake system itself is to blame.īendix also offers a valve (BVA-85) that aids in checking the stroke on slack adjusters.
#BEST WAY TO INSTALL SLACK ADJUSTERS LICENSE#
As Dana points out, the term automatic does not give you license to “install and forget.” Manufacturers are unified in their advice that automatic slack adjusters should be checked on a regular basis, perhaps even as part of a driver's pre-trip inspection. 16, on recent NTSB slack adjuster recommendations.) Units can break or can be improperly installed, for example. This will help increase their longevity by reducing wear.With the development of automatic slack adjusters (ASAs) has come the misconception that if you install an ASA on your brake system, the stroke will be accurate from then on. Make sure that after application, repeat the greasing procedure after every 25,000 miles have been driven using the same slack adjusters.
Right after installation and adjusting the angles, apply generous amounts of grease to the slack adjuster mechanism. It is recommended that slack adjusters be well lubed up at all times. Set all the slack adjusters to this angle. This angle even on brake application should only be slightly higher than 90 degrees. Your friend must apply the brake while you check the angle that the slack adjuster arm and the actuator push rod are making. Now, after your installation is done, you have to check the adjustment of the slack adjuster. Line the yoke pin hole with the arm hole and install the yoke pin and the cotter pin into the mechanism. The adjustment screw on the slack adjuster can be rotated. These are parts of the assembly of the slack adjuster. Make sure that it is a tight fit as it has to hold the slack adjuster into place at all times during brake operation.
Step 3 – Install Retaining MechanismĪfter you have installed the slack adjuster onto the brake cam shaft, re-install the retaining mechanism on the end of the brake cam shaft. Make sure that the adjustment screw of the slack adjuster is only so tight so that there’s room for you to add grease. This angle should be maintained when the brakes are not applied. The trick is to make sure that the slack adjuster arm and its actuator push rod that helps close the adjuster on application of brakes is at a 90 degree angle. When it has slid on completely, rotate the slack adjuster until it is secured into place. To install the slack adjuster, first slide the adjuster on to the spline end of the brake cam shaft. Use the mechanic’s kit for appropriate tools to remove the mechanism. To install the slack adjuster, first remove the retaining mechanism from the brake’s cam shaft. It is installed at the end of the brake cam shaft. Your vehicle’s brakes come with a retaining mechanism.