C.Rotate the manual adjustment hex counterclockwise until the Versajust slack adjuster is clear of the brake actuator push rod.
Note: Considerably more torque is required to rotate the manual adjustment hex counterclockwise than is necessary to rotate it clockwise. The torque may be as high as 70 foot pounds.
2.If the Bendix® Versajust™ slack adjuster is equipped with the quick‑connect yoke assembly illustrated in Figure 3:
A.Rotate the Versajust slack adjuster's manual adjustment hex counterclockwise until the brake actuator push rod begins to move just out of the actuator.
B.Pinch the legs of the retaining ring together and pull the Versajust slack adjuster away from the brake actuator push rod until the adapter bushing is free of the yoke. Remove the retaining ring from the adapter bushing.
C.Rotate the manual adjustment hex counterclockwise until the Versajust slack adjuster is clear of the brake actuator push rod.
3.Remove the Versajust slack adjuster from the camshaft of the foundation brake by removing the retaining clip and any spacers or washers that may be present.
DISASSEMBLY
GENERAL
A reasonable level of cleanliness should be observed when working on the Versajust slack adjuster. Clean the exterior before disassembly.
The following disassembly and assembly procedure is presented for reference purposes and presupposes that a rebuild or repair of the Versajust slack adjuster is being undertaken. Several replacement parts and maintenance kits are available which do not require full disassembly. The instructions provided with these parts and kits should be followed in lieu of the instructions presented here.
1.Clamp the Versajust slack adjuster ARM in a bench vise. Do not clamp across the portion of the body that contains the adjuster assembly or worm gear. Using a wire brush, thoroughly clean the exterior of the slack adjuster, paying particular attention to the area around the manual adjustment hex and its retaining ring. Wipe all loose contaminants away before proceeding.
2.Remove the cotter pins and washers from the yoke pin and link pin.
3.Remove the yoke pin and link pin, and separate the yoke from the Versajust slack adjuster.
4.If the Versajust slack adjuster has a yoke pin bushing, press it out of the slack adjuster arm.
5.No further disassembly of the Versajust slack adjuster is permitted.
CLEANING AND INSPECTION
1.Inspect the worm gear camshaft splines for damage. If damaged, replace the Versajust slack adjuster.
2.Clean and inspect the yoke pin and link pin holes in the yoke, the adjuster link, and the slack adjuster body. The holes should be visually round with no perceptible “egg shaping.” A new yoke pin and link pin can be used to make this inspection. If this condition is noted, the affected part must be replaced.
3.Clean out the retaining ring grooves in the yoke.
REASSEMBLY
1.If the Versajust slack adjuster uses a yoke pin bushing, press it into the slack adjuster arm.
2.Depending on environmental conditions, an application of anti‑seize compound to both the yoke and link pins may facilitate later removal. Install the yoke and secure it to the Versajust slack adjuster body and link using the yoke pin and link pin. Install washers and cotter pins in the yoke pin and link pin, and secure each. Bend each leg of the cotter pins to a minimum of 25 degrees, creating an included angle of at least 50 degrees between the legs.
3.Lubricate the automatic slack adjuster through the lube fitting with a quality multipurpose chassis lubricant
(N.L.G.I. Grade 2). Lubricate the slack adjuster until clean lubricant flows from the grease relief opening in the boot.
RETROFITTING THE BENDIX® VERSAJUST™ SLACK ADJUSTER
PREPARATION
The Bendix Versajust automatic slack adjuster can replace a manual slack or competitive automatic slack adjuster provided some considerations are kept in mind:
1.Excessive duty cycles, high application pressures and brake force compounding can result in reduced slack adjuster durability.
2.Determine that the AL factor of the vehicle to be retrofitted is 195 or less. To determine the AL factor, multiply the slack adjuster arm length (from the center of the cam spline to the center of the yoke pin hole in use) times the brake chamber size. For example: a Type 30 brake chamber connected to a 6 inch arm slack adjuster: A = 30 square inches, L = 6 inches; therefore, 30 x 6 = 180, AL factor.
3.Make sure the foundation brake components are in good condition. Excessive drum
4.In order to select the proper slack adjuster, choose a Versajust slack adjuster with the same arm length, spline size, push rod thread size and offset as the slack adjuster it is replacing.
5.When retrofitting the Versajust slack adjuster, make certain to read the instructions packaged with all service replacement Versajust slack adjusters.
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