Posted by haley on October 08, 2015 at 17:45:31 from (166.137.10.27):
My father has been working on this one a couple of days and it is whipping both of us.The tractor is a diesel and the problem is there is no oil coming out of the rocker arms to lube them.This tractor sat a while but the engine runs great and has good oil pressure. The oil pressure was running around 30-35 on idle but there is absolutely no oil coming out to lube the rockers.We have taken the shaft off several times and it is completely clean inside.You can easily blow through it with air.The roll pin that locates the shaft to the head is good and the oil hole lines up with the head just as it should.With the rocker shaft off you can turn the starter to build the oil pressure up to 30 but only a trickle or small pulse tries to come out of the head.Is there a check valve somewhere in the block that regulates the oil to the rocker shaft? We are both VERY competent diesel mechanics but this one has us whipped and we are at the point of tearing into the motor to try to find the problem.ANY help would be greatly appreciated.
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