BO not oiling

[Brady Vollman]

I am working on my dads BO, My current problem with it is that I am not getting any oil out of the tube that runs to the tappet cover. I have cleaned the tube and the port at the governor. Very little oil comes out while running, I have played with the pressure regulator running it real high on pressure and then real low. I get the most oil coming out when the tractor is idling and the oil pressure set dangerously low. But even then its not enough to send oil out the end of the tube when installed.

Any chance it is a worn oil pump even though I can peg the oil pressure guage by adjusting the relief screw, or am I missing an oil slinger on the governor shaft that I can't find in the parts manual? Any other suggestions?

Thanks from WY

 

[Paul from MI]

Check to be sure the hole in the oil passage in the governor case is open. It's only about a 1/16" in diameter and is aimed towards the governor gears. Also be sure the trough tat catches the oil slung off the governor gears is not filled with sludge. Just some thoughts.
Paul

 

[greenmech]

Paul may have it. That oil hole is directly behind the gauge connection. Use a small wire to open. Ron Mn

 

[Brady Vollman]

Thank you, I will look into that later today.

 

[WTW]

Brady,
If you do not find this oil passage drilling behind oil pressure gauge, some of the early model unstyled "B's" did not have this oil hole in governor case. I have drilled this oil hole into case at this described location to aid in oiling. If you are making oil pressure adjustments at the adjusting screw in front of governor case that tells me your tractor is an earlier model. The reason it oil betters at low oil pressure setting is because there is a larger volume of oil exhausting over relief valve inside of governor case. By drilling hole, a higher oil pressure setting will pressure feed more oil (through drilled hole) to governor bevel gear set to be flung over into governor gear and onto oiling trough to rocker cover tube. This is a good fix at oil pressure can be set to a normal, to maintain lube needs at all locations. Good Luck, DW

 

[Brady Vollman]

You're the man of the day. I just came in to read for more replies, as I just looked for this passage and could not find it, and yes this is an early BO, 250208. I guess now I need to figure out where exactly to drill this hole.

Thanks for the replies, you guys are great help.

 

[Radiator Bolt Man]

Brady - in your persuit on this one, keep in mind the oiling targets are (1) the governor bearings and (2) the fan drive & pinion gears - these in addition to some splash into a trough leading to the tappet oiling channel. I rather imagine you will almost need to remove the governor and then maybe even take the rotating assembly out of the case in order to do new drilling - if indeed new drilling is needed. I am still hopeful that when you get inside, you find the hole there, but stopped up! That would make it easy! And - as some have hinted or warned, boring a new hole (or unstopping an old one at this stage) will be like adding another output from a manifold. Overall pressure will fall even lower. An oil pressure adjustment may be in your future!

There is some data on this issue in this forum's archives - but I recall it being more on the Model "A" -- but whatever you can find, may be helpful. (Pat)

 

[WTW]

Brady,
If your governor has this hole drilled in it or if you decide to drill it into your governor case it is found/located and drilled from dead center of oil pressure gauge hole/bore. The oil pressure passage that routes oil to gauge will supply this drilled hole which will spray oil directly onto bevel pinion gear set. Very easy to do if governor is removed from tractor. I wish I could remember the size but don't. I know it is fairly small. A trip to a junk yard with a drill index will show and tell you every thing you need to know simply by removing the oil pressure gauge. This passage will be found on all B models up to and including 1946 models. If you decide to remove governor remember to remove oil line from underneath first. Good Luck, DW

 

[Brady Vollman]

Things I have discovered so far;
1.there is no oil passage hole behind the oil pressure gauge, but that it oils the governor internals by a little passage at the oil pressure regulator. While spinning engine over, it really sprays alot of oil from this passage. I don't believe this is the oil that is meant to make it to the trough as it sprays directly onto the fan drive ring gear, and I really doubt it can make it much farther to the left side of the case.

2. The oil trough is longer than I originally suspected, the portion of it directly in front of the governor drive gear was filled with sludge and probably not directing the portion of oil it received to the remaining trough, but just back into the crankcase.

So having studied this thing for awhile, I have come to believe the oil that makes its way into the trough is actually supposed to be brought up the drive gears from the crank case and then slung into the trough, and not from the oil pump supply. Am I right? Hope all this makes sense.

Brady

 

[greenmech]

With that serial # it seems to be an AO. If so the hole on some A's were drilled 90 degrees to the gauge fitting. Good luck. Ron Mn.

 

[PBrowning]

Hey Now!

Nice catch on serial number versus model number!

(PatB)

 

[Brady Vollman]

Oops, serial number mixup, it is 325208. I had 5 of the 6 numbers right.

In my searching and researching, I looked at a brass tag B that we also have torn down, #79** I can't remember the number now, but it's governor is the same with no hole drilled.

 

[Radiator Bolt Man]

Very Good - Now we have a BO again - not an AO! It's kind of funny how the least important of all things often leaps into the forefront now and then. (PatB)

 

[Brady Vollman]

Just a quick note, after cleaning the trough, and drilling a passage behind the gauge I now have oil coming out the tube.

Thanks for the help guys.
Brady

 

[PBrowning]

Here is where a posted photo would be worth it weight to be sure. Far too many of these reported lately, and engine part lube is essential!!! (PatB)