It is OK to turn the engine as long as the Pump is not out of the gears. The Compression test requires a diesel compression gauge, and adapters for the injector hole. A air pressure leak down may be easier. Make an adapter for an air chuck to fit the nozzle seat. Remove the valve cover and loosen the cylinder's valve adjusters so much that you can take out the push rods (this will likely require turning the engine enough to get the valves closed). Put the tractor in neutral. Remove the main air intake hose from the intake manifold. Turn the engine In the correct direction until the piston is traveling downward, then put 100+ psi of air to the cylinder.
Listen for escaping air from the intake opening.
Listen in the muffler.
Listen in the oil fill hole.
The hissing intake and exhaust hissing will indicate major issues with valves.
Some hissing in the oil hole is blow by and normal. A massive flow indicated a hole in the piston, or broken rings.
If the culinder seems pretty tight, It might be injector issues.
My input would be to switch cylinders and see if that moves the miss. A diesel shop is needed to test injectors correctly. JimN
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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