It is a good idea to purge fresh ECO Li Plus grease through the slack adjuster whilst carrying out this procedure as this ensures that the grease finds its way around the internal clutch mechanism.Īlways remember to replace the dust cap after any adjustment and if the cap is damaged new ones can be obtained. ![]() You should be able to hear a definite click as the slack adjuster over-strokes and when the slack adjuster is on the return stroke you should see the adjusting bolt wind on clockwise. Then, either by hand, or by having an assistant operate the footbrake, apply and release the brake half a dozen times. To do this, remove the plastic dust cap and wind off the brake by turning the adjusting bolt approximately one and a half turns anticlockwise. Twice a year, the slack adjuster should be checked to ensure that the automatic adjustment is working correctly. If you try to force anti-clockwise rotation without depressing the internal clutch then the mechanism will be damaged. Note: To back off the brake, the adjusting bolt has to be rotated anticlockwise and to do this the socket has to be pressed into the slack adjuster quite hard against a spring to release the clutch. The adjusting bolt is located under the plastic dust cap on the outer face of the slack adjuster body. Note: If this is not the case, then it will not be possible for the slack adjuster to auto-adjust properly and BPW should be contacted for advice before proceeding further.Īssuming that the pin and pointer are correctly set, then the most convenient way to adjust the free play is to use a 19mm socket to wind on the brake until it just binds and then release the brake by turning the adjusting bolt one half turn anti-clockwise (Fig. Correct inservice adjustment of the brake should be checked periodically: with the brake released, the pin and pointer on the side of the slack adjuster should be exactly in alignment (Fig. The key to long life and efficient operation of this system is correct lubrication and adjustment. Again, a grease nipple is provided for lubrication and this follows the pattern previously mentioned. The slack adjuster is located on the splined end of the camshaft and is secured by a nut. The camshaft is connected to the air chamber by an automatically adjusting slack adjuster. A grease nipple is provided and the level and period of lubrication is the same as for the outer bush (Fig. The bearing is held in place by half-shells bolted to the inner camshaft bearing bracket. The bush has greaseways and reservoirs formed into it during the sintering process. The inner bearing is made of sintered steel and is a self-aligning spherical design. ![]() There is an ‘0’ ring positioned near to the outer edge of the bush to prevent grease from escaping into the drum and contaminating the friction surfaces. Figure 1īPW ECO Li Plus grease should be applied until fresh grease emits through the dust cover, with the period of greasing being every six to eight weeks. The grease is applied through a grease nipple positioned just behind the brake back plate (Fig. The grease is contained in reservoir holes punched through the bush. The outer bearing (bush) is of rolled nonferrous construction and has greaseways rolled into it.
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