No oil to governor

My 38' B is not getting oil up to the governor nor to the tappets. However, the oil pressure gauge on the side of the governor housing shows good oil pressure when it's running. I removed the crankcase cover and didn't see anything obviously wrong with the piping/tubing coming up from the oil pump, but mine is not a trained eye either. Logically, I'm assuming something is plugged or not connected.
Before I start taking things apart, can you give me an idea of where to begin or how to proceed? Thanks!

There is a drilled hole directly opposite the gage port that sprays oil onto the governor gears, and thus into the trough inside the governor that feeds the rocker arms through the oiler tube. It may be plugged, or possibly the drain from the governor trough may be plugged. Just some thoughts. Either one should be able to be leaned with out taking the governor off.

Depending on how old the tractor is and if it has the original governor housing, you may or may not find this drilled passage Paul spoke of. The oil pressure passage should be there if your tractor is a true 38 model with original governor. The older unstyled tractors had an oil pressure adjusting screw in the governor housing and these did not have this drilled passage. I have added this passage to some of my unstyled tractors. FYI, DW

It sounds like your gauge screws directly into the governor case, if so then remove it, wash out the oil in that port in the governor, and look in the forward end of the gauge port to spot the hole going forward that oils the governor gears and rocker arms. A small mirror driven with sunlight works wonders here for getting enough light in there to see with. It's very small, bailing wire is too big to use to clear it, but survey flag wire is just the right size and has a bit of a temper to it too. Use 8 inches of that to push the crud out of the hole from the gauge port. Just tap on the end of the wire lightly and work the crud out slowly as it's usually very soft stuff. My 44 A has this hole as described, but later models have it moved to some other location as the oil gauge port connection has moved as well. There is a good chance your hole is just as described above, but I don't have a 38 B to verify that positively. Best of luck finding and clearing it.

Yes, my oil pressure gauge screws directly in to the back side of governor housing. It baffles me that the governor and tappets have to depend on lubrication from such a small hole. All sounds great.......I'll give it a try. Thank you all very much!

It baffles me too, it's essential for that to remain open. After reading several accounts in here where after a 20 year time period, people have gone back inside their pristinely overhauled tractors to find two inches of crud laying in the bottom of the crankcase AGAIN, I'm thinking we all need to open these these things up every ten years or so to clean it out again AND knock that hole open just to be sure the top end gets the oil it needs. They report that they are using high grade Diesel motor oil and changing filters often too, so the crud build up shouldn't be happening, maybe it's just the nature of the beast to do this? At any rate, that's my plan even though I remain baffled. I also went to the ACE hardware store and bought an extra long 1/16" drill bit and opened that hole up a notch, now I can use the drill to open it back up with too.

But mine gets it's rocker arm oil from another source, you might wind up with a bit of oil smoke if you go heavy with oil on the valve stems. Mine only oils the exhaust rockers and they splash enough onto the intakes that they work fine, but everyone that 'improves' that oiling system to put oil on the intakes too then complains about the constant blue smoke they get for doing that and all to often revert back to get rid of it. Just a heads up if you wanted to 'improve' your oil system while you are in there.

Thanks for the comments, Lee. Here"s what I"ve done: I unscrewed the oil pressure gauge and looked inside the hole with a strong light and mirror and didn"t see a small hole anywhere. I then took a very small modeling paint brush dipped in cleaning solvent and stuck it inside the hole as far as it would go and cleaned off the old oil. I probed the inside of the hole with a tempered small-gauge wire for a while, but had no luck finding it. After looking again with the mirror & light, I"m convinced there"s not a small hole in there. I"m stumped! Is there anything else I can try? Thanks.