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John Deere Tractors Discussion Forum
:

checking compression on a 4020 diesel

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4010 puller

10-08-2007 09:53:08




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Hello: I looked through my manual but it did not tell me how to check compression on my 4020. What should the compresssion be and how should it be obtained? Does the engine run on 5 cylinders at a certain rpm while testing each cylinder or is it just cranking speed?

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msb

10-08-2007 19:44:35




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 Re: checking compression on a 4020 diesel in reply to 4010 puller, 10-08-2007 09:53:08  
Cranking speed.Book calls for 450-475 PSI at 275 rpm cranking speed.



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