Farmall Cub Forum -- Questions and answers to all of your Cub related issues.
Sun Feb 03, 2013 10:06 pm
djknight wrote:It is a 1969 ih cub 154.just been rebuilt. Are the bearings getting any oil with me getting oil in the filter canister.
Oil is getting to the bearings.
Who rebuilt the engine? Back to my common fault of rebuilders - leaving out the oil gallery plugs when block is boiled out.
Sun Feb 03, 2013 10:07 pm
Agree with Eugene, if its just been rebuilt, then chances are one of the plugs didn't get installed.
You may be getting oil to the bearings, but it won't be under pressure and isn't good to continue running it. I'm afraid you'll have to tear into the engine.
Sun Feb 03, 2013 10:09 pm
If you have never shown oil pressure since the rebuild, it is probably missing gallery plugs. If you have had pressure, even once since the rebuild, it is't. One of them is behind the camshaft gear. Installing that plug will require major disassembly.
Mon Feb 04, 2013 8:24 am
The oil plugs were never taken out.do I still need to tear down engine
Mon Feb 04, 2013 8:41 am
When engine was boiled the plugs were left in. And engine was built with the same plugs left in. Are those plugs got an orifice in them to create pressure.thanks for all the help
Mon Feb 04, 2013 9:10 am
If you have oil pumping into the canister, and the plugs are definately installed, and the relief valve is installed and working properly, and the oil filter is installed and good, you should have pressure.
The only other thing I can think of is the pump itself being wore out. Where are you located?
Mon Feb 04, 2013 9:23 am
djknight wrote:When engine was boiled the plugs were left in. And engine was built with the same plugs left in. Are those plugs got an orifice in them to create pressure.
Typically the oil gallery plugs are removed and the oil galleries cleaned with a bore brush.
No orifice in oil gallery plugs. Plugs are allen headed machine screws used to close off oil gallery opening. Remove the valve chamber cover and see if a allen headed machine screw is located just below the bolt hole holding the cover in place. Easy to replace if missing. Also check the oil pressure regulator valve - see if it's in place and the spring present. Easy fix if missing.
Question again: Professional engine rebuilder? Do it yourself? School shop?
Mon Feb 04, 2013 9:32 am
Need to talk to so.eone about this.9042264640
Mon Feb 04, 2013 9:38 am
Are you in Jacksonville Fla? I'll be in NE Fla by this weekend and be there for a few days. If you can meet, I might be able to help you out.
Mon Feb 04, 2013 9:48 am
djknight wrote:Need to talk to someone about this.9042264640
Post your question or questions on this board. There is a large number of members who are extremely knowledgeable about all facets of engines. Including folks who have been working on engines for 60 plus years, engineers of several types, folks who dismantle and rebuild engines, instructors in auto mechanics, etc..
Someone or several people will know the answer.
Mon Feb 04, 2013 12:41 pm
I question the gasket behind the oil pump, I have never had this problem, but have heard that if the gasket is not the proper thickness then you will not get oil pressure. Anyone else know about this from hands on projects?
Mon Feb 04, 2013 1:38 pm
I know it's not the answer you want to hear, but to protect the $$$ you put into rebuilding that engine you are probably going to have to tear it down. There is just no way to know what is going on in there otherwise. We don't have long distance X-ray vision, unfortunately.
The oil pump is inaccessible, and the galley plugs are inaccessible without tearing into the tractor.
Mon Feb 04, 2013 5:18 pm
DJ, how long are you running the motor before you shut it down due to lack of oil pressure? Again, it takes a bit of time for oil pressure to show up on the gauge.
I can't believe the plugs were not removed when the block was boiled out if it was done by someone that knows what they are doing. The oil galleries need to be cleaned out and the only way they can be cleaned out is by removing the plugs. Have you removed the valve chamber cover to make sure that plug is in place??
Mon Feb 04, 2013 6:18 pm
I pulled the engine today. There is a threaded hole for a plug right behind the cam gear.there are no plug in it.could that be why I'm not getting oil pressure. The hole behind the cam gear looks like access to the oil channels. A y help
Mon Feb 04, 2013 6:30 pm
djknight wrote:I pulled the engine today. There is a threaded hole for a plug right behind the cam gear.there are no plug in it.could that be why I'm not getting oil pressure. The hole behind the cam gear looks like access to the oil channels. A y help
That is the problem , I hope the rest are in it.
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