1969 LoBoy 154

Sun Jun 08, 2014 8:59 pm

I have a dilema :lost: , I have taken on rebuilding the engine in my dad's cub that would still run, just didnt have any power. I mean you could drive it around, but if you tried to engage the mower deck it would not have the power to run it. That said, here is my problem. I have already disassembled most of the engine and have found the following, the valves were not "too bad", but I plan to replace them and lap the new valves in, the head gasket was burned between cylinder 2 and 3, the rod bearings were showing significant wear, so I will be replacing rod and main bearings after the engine is completely disassembled and throughly cleaned.
Here is my dilema, the rods, all 4, have the numbers ground off. I know I need the rod numbers to get the correct bearings, but how do I find out what I need? I do find it odd since this was an unmolested engine that the numbers were ground away leaving only the R1 and the trademark IH on that side. If it is any help, the pistons are domed and I do know the tractor dates to 1969 since my dad bought it in 1970. Any help is greatly appreciated. I had promised my dad last year we would rebuild the engine this spring, sadly, he passed away in March, but I am still going to do as I promised. :help:

Re: 1969 LoBoy 154

Mon Jun 09, 2014 4:36 am

Back side of the rod and main bearings should have IH or manufacturer's part numbers and size.

Re: 1969 LoBoy 154

Mon Jun 09, 2014 3:12 pm

Eugene wrote:Back side of the rod and main bearings should have IH or manufacturer's part numbers and size.

The bearings do have a part number along with the IH stamp, but I havent been able to find it on the parts list. The rod bearing is STD 274466 R1. If what I found is right, I believe these are the "narrow" rods, the bearing is .660, I believe the "wide" rod is over .750

Thanks! :thanx:

Re: 1969 LoBoy 154

Mon Jun 09, 2014 3:39 pm

Your part number isn't in either of my Cub parts books.

Suggest visiting the auto parts store or Case/IH dealership with bearing in hand. They will be able to cross reference. Case/IH will be able to identify - for sure.

Re: 1969 LoBoy 154

Mon Jun 09, 2014 6:48 pm

Since you said it had quite a bit of wear in the bearings, I suggest taking the crank to a machine shop to be checked and ground if needed before getting bearings. Might be a good idea for the block to be measured also, it may need bored.