I ran thru these motors and checked the given min/max tolerances and thankfully the were perfect. Yes I understand either the front rocker shaft or rear rocker shafts have to be installed and tightend down when the rocker shaft is down not bolted down when the valves are pushing it up. Ive adjusted valves on two motors now and, yes I had the rocker shafts off and installed them. With these cummins motors if jakes are for example over spec,you have to loosen the rocker shaft bolts and "push or rotate the shaft towards where it needs to be then retighten down the rocker shaft stud bolts and recheck the tolerances for the jakes. Ive watched rawze video on the injector swap, and he ran thru the overhead, (the overhead makes sense to me) but the jakes on how you have a toleance of +/- such a min/max is odd, especially coming from a series 60 were you adjust the Jake brake and your done. ![]() Please give me the run down on why the adjustment of the Jake brake is odd to me on these cm2250s/871s/cm2350s? Ok, ive adjusted jakes before on series 60s and its cake walk, its simple.
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