compression

ac bear · Jul 11, 2009

I have a allis chalmers wc that has so much compression that i can not crank it, so it has to be pulled to start it and then it is hard to turn over. Someone has rebuilt it with M&W pistons. I'm 70 and looking for a simple way to lessen the compression. Can a person go to a different head or put more than one head gasket on it and will this help? I really like the tractor, but do not want to do a complete rebuild at this age. Thank you.

Jerry Coulter · Jul 11, 2009

Are you sure it is compression? How much has it run since overhaul? I'm thinking that the crankshaft bearings are adjusted too tight and may burn out. Hopefully the mechanic didn't install a WD45 crank with flat top pistons, then it would have excessive compression.

DickL · Jul 11, 2009

Have you taken all the plugs out to see how easy or hard it turns over?? If it turns over hard with the plugs out it is time to drop the pans and check the bearing clearance.

Anonymous-0 · Jul 12, 2009

M@ w pistons up the compression from factoru 5.4 to 5.7 not enough to make it hard to start. I would say it was put together incorrectly and is to tight. as they posted if you take the plugs out and cant turn it easy by hand the mains or rods are to tight . Its a common mistake.

compression

ac bear

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Jerry Coulter

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DickL

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Anonymous-0

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