Posted by Bob M on June 05, 2009 at 12:54:51 from (151.190.254.108):
In Reply to: Super C oil pressure posted by thumbanger on June 05, 2009 at 11:33:03:
Swap in a known good 0 - 45 or 0 - 80 gage and see what the actual pressure is.
With the oil fully warmed up, so long as the gage shows a minimum of 15 psi at speed and is at least a couple psi (gage hand is off the 0 pin) at idle I wouldn't be terribly concerned - especially if you don't plan to work the tractor hard.
As the others note below the cause could be a warped oil pump cover (easy to fix) or worn bearings and/or crank (more expensive!).
Incidentally switching to 15W-40 oil usually increases oil pressure by a few psi in an engine with a worn bearings and/or a tired pump. You might give that a go and see what happens.
Incidentally also I purchased my Super H for a good price on account of a "chronic low oil pressure" problem. The "problem" turned out to be a stiff, worn-out gage...
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