Engine noise Case VAC

gbott · Oct 23, 2016

I'm working on a Case VAC that has engine noise. I dropped the oil pan to check the Rod bearings. I noticed there is slop in the oil pump gear. Is that normal? Could it cause noise? What is the best way for checking the rod bearings?

Thanks,
GBott

gbott · Oct 23, 2016

Also, is there anything else I should check for the noise? 85: a knocking. All pistons and sleeves are good. I'm assuming it's a lower end bearing. It was resonating from the bottom end. Maybe a wrist pin? I've also read about loose flywheels causing noises?

Thanks,
GBott

casecollectorsc · Oct 23, 2016

What's the oil pressure? You'll have to pull the rod caps off the look for a damaged journal.

NickatKY · Oct 23, 2016

Make sure the keyway on the crankshaft belt pulley is not worn. You can check it by rocking the fan back and forth. Nick

olddog · Oct 24, 2016

Check fore and aft endplay on the crank.
Sometimes the pin breaks, that locates the thrust bearing on the front crankshaft bearing;
allowing it to spin and wear muchly.

gbott · Oct 24, 2016

Thanks for the reply. This tractor sit for a few years after my cousin heard the knock. I got it back running recently. It's gauges are faded, and the freshly rebuilt carb was running at full throttle because of a shade tree mechanic fix on the linkage. I did just find foil like residue in the oil gunk in the pan.

GBott

gbott · Oct 24, 2016

Thanks for the reply. Do you check this by moving the fan as stated above?

gbott · Oct 24, 2016

Thanks for the reply. I will check that tonight. I did find bearing residue in the pan.

GBott

olddog · Oct 26, 2016

No. You check it by trying to move the crankshaft pully; fore and aft..
Holding the clutch in made less noise, on mine, when this was the case.

Engine noise Case VAC

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