No oil to rockers

[Dazo1960]

There is no oil reaching the rockers I have removed the cylinder head to find a rubber geometry in the oil port that supplies oil to the rockets has any one come across this regards darryl

[super6954]

Hi If you mean there is a rubber O ring with a square section profile in a recess on the block face , then yes. it's supposed to be there to seal that port where it mates together when the heads on. If you got no oil up there to the rockers, can you crank the motor over with the starter. Then see what you get out the hole in the block for oil flow . It could be your motors totally shot and it has no oil pressure due to worn crank/ bearings. cam journals or sometimes bad pressure relief or oil pump . Wouldn't be the first major to have one or any combination of these issues, have you ever tested the oil pressure with a good gauge . I seem to think you said it's full of sludge and gunk before. Have you removed the oil pan and cleaned the suction screen to. I have seen those plugged solid with sludge also, and restrict oil flow I bet more money on worn out than something simple sadly. .

Just thought also if it's ever spun or seized a bearing in it's old life, there could be white metal plugging the gallery that brings the oil up to the top. Bear creek ( Pat) had a self induced issue similar to yours. He used bearing fit compound to stick in crank bearings. Then found your oil type problem on the first run up, it was caused by a big gob of glue plugging the oil gallery from the crank up to the rockers. he cleaned the glue out refitted everything and problem fixed, white metal would do exactly the same, and it could of been like it years to, just the same as shot bearings and stuff. to be honest you could be looking at a motor tear down and re build from what you do and don't say here, as far as a 90% rebuilt tractor, it sounds like the %10 is the motor .
Regards Robert