Checking slack adjuster travel is not 'working on' a truck. It is a basic check of the proper adjustment of the brake. If you have a helper (like another driver?) you don't need to get under the truck at all. You can eyeball the amount that the slack moves when brakes are applied. Long ago, when I went to CDL school, a quick check was to look at the ANGLE of the slack adjuster to the brake apply rod while the parking brake was applied. If the angle was 90 degrees or less, it was usually out of adjustment. If the angle was over 100 degrees, they were usually OK.
In any case, most trucks today have automatic slack adjusters that actually work like they are supposed to. Makes a quick look a bit simpler.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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