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620 tractor hyd pump--need help

D

DEAN C

Member
where do's the idler shaft that runs hyd pump gets it's oil from, got one that is running dry and can't find any oil port to feed it--THANKS
 
Oil carries up the gears and lubes it. Not be best way of lubing that shaft. The orchard models and the very late 630 row crops had a hole drilled in the governor housing so oil could,be pumped into the end of the idler shaft. The idler shaft is already drilled and has an oiling hole in the center of the shaft, all you have to do is pipe oil to it. The oil came from the line that goes up to the oil gauge. You can drill your own hole and tee into the oil gauge line yourself. The hole fits a 1/8 inch pipe fitting. I did it with my 630 forty years ago after replacing the idler shaft twice. Haven't had a speck of trouble since then. Mine was already drilled so the job was easy.
 
You might have to turn up the oil pressure a twitch after you do this but that's easy to do. A lot of guys who put a sizeable loader on a two banger with live hydraulics have done this. Come to think of it I did mine in January of 75 after a big blizzard. Had a loader on it and that little idler shaft couldn't take the constant strain being splash lubed.
 
I agree with Fixerupper on drilling the housing - works good! If you run it long enough dry, it will seize on the idler shaft and shear the little keeper pin, allowing the shaft to spin in the governor housing. Mine did just that, and I had to remove the governor housing and torch the gear off of the shaft to get it out. You want to avoid that scenario if possible, ha. Log splitter was the implement that overtaxed mine.
 
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