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Mccormick Deering o4 oil pressure problems

A

Anonymous-0

Well-known Member
I have a Mccormick Deering o4 that isn't getting oil to the rocker arms. Probably not to the bearings either. Oil is getting to the gauge and the filter.
Any advice?
thanks
 
If the engine gauge is showing oil pressure, it is probably getting oil to the lower end. The oil is routed to the head from the center cam bearing through a drilled hole to the head. The cam bearing has two oil holes in it that align with a drilling in the cam for a moment as the cam turns. This spurt of oil is all that is needed to lube the top end. If the cam bearing is installed correctly, the oil passage might be plugged. a gas welding rod, or straight coat hanger wire could be inserted into the hole from the top while the engine is slowly rotated by hand. If the cam bearing holes are aligned correctly, the wire should eventually drop into the cam passage. (do not keep turning, as the cam will chop off the wire, resulting an a dissassembly to remove the piece!!!) I hope this helps. Jim
 
I forgot to mention that pressure doesn't show on the gauge. Though I tested gauge with an air compressor and it worked.
Thanks
 
(quoted from post at 08:42:31 10/31/12) I forgot to mention that pressure doesn't show on the gauge. Though I tested gauge with an air compressor and it worked.
Thanks
Click to expand...

Might be a good idea to drop the oil pan and have a look at the oil pump. I would tell you to remove the oil pump also, but I don't think you can on that model without first removing the front axle stabilizers, or pulling the complete engine.
 
sure dont want to be starting that tractor if it has no oil pres.your doing nothing but brg. damage. better get the pan off and have a lookie in there.
 
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