User manual BENDIX SINGLE ANCHOR PIN CAM BRAKE

[. . . ] ® Bendix® Single Anchor Pin Cam Brake FIGURE 1 OPERATION The Bendix® cam brake operates in the following manner during a braking application. The force of the push rod of the actuator is converted from a linear force to a rotary torque. This is accomplished by use of the slack adjuster. This torque is transferred to the cam shaft of the foundation brake due to the spline of the cam shaft being connected to the gear of the slack adjuster. [. . . ] Check fit of anchor pin in torque spider. Radial clearance in excess of . 010" indicates excessive wear. Replace anchor pin and/ or torque spider. Inspect rollers and pins for flat spots, galling, broken or cracked surfaces. Inspect anchor pin for worn, broken or cracked surfaces. Check shoes for bent shoe webs, cracks in shoe table welds or webs, and elongated rivet holes. Replace shoes if any of these conditions exist. Measure the shoe span by loosely installing the anchor pin and cam roller in the appropriate ends of the shoe web. If the distance from center of anchor pin to center of cam roller exceeds 11. 78" replace shoe. Replace when any of the following conditions exist: 1. Lining thickness at thinnest point is 1/4" or less. Linings are cracked or worn in an unusual or odd pattern, i. e. , lining wear tapered from side to side across shoe table. Unusual wear patterns can indicate damage to foundation brake parts. Rivet holes are elongated in lining or shoes. Linings can be moved by hand, i. e. ; loose rivets. 5 7. Inspect drums for cracks, heat checking, glazing, grooving, severe out-of-round condition or bell mouthing (must not exceed . 025 T. I. R. ). It is recommended that drums be turned at reline to prevent hot spotting and achieve quicker, more complete burnishing of the new lining. to be sure the maximum limit allowed (stamped on drum) has not been exceeded, due to wear or machining. Check for cracks in the body and arm of the slack adjuster. The amount of backlash in the slack adjuster to camshaft should be no more than . 094" measured 6" from centerline of the cam shaft (See Figure 8). ASSEMBLY (SEE FIGURE 2) 1. Install the spider onto the axle flange using the five bolts, three 5/8" studs, lockwashers and nuts. Install the actuator bracket and cam tube onto the spider using four cap screws and lockwashers. [. . . ] Different air chamber size or slack 4. Grabbing or pulling 8 BRAKE SHOE AND LINING TROUBLESHOOTING CHART SYMPTOM 1. Glazed linings (hard and shiny) CAUSE Bell-mouth drum. Loose wheel bearing, Relining one brake. [. . . ]