Hello-
I am in the process of an engine overhaul on my 1950 Cub. A few of the connecting rod bearings have light scratches - just one strait scratch across the bearing surface. The crank is clean, no scratches, and measures within factory specs. Should I replace the bearings or re-use the original?
Thanks for the help,
Matt
NJ
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Replace Rod Bearings?
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- 10+ Years
I have a 1947 Cub and it sounds like we are doing about the same thing. When I checked the inserts they had a minor scratch in the center but the crank bearing surface appeared good and measured within tolerance. I talked to several people and got various opinons. Someone suggested that when you have gone that far why take the chance. That made sense to me. I decided to replace the bearing inserts
I have them on order.
Bob
I have them on order.
Bob
- AlanPCUBS
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These are precision-insert bearings. A bearing protects itself by letting particles actually embed in the bearing lining material. It's called embedability.If the material was to hard to allow this it would lie on the surface and scratch the shaft journal. Now if to many particles (embed) on the bearings.That would also result in failure. To big a particle and that too.With oil filter, air cleaners, screens ,particles of dirt will get in engine. Cub engine ,what cranks @1800 rpm The bearing load is on the connecting rods are not that great. Combustion pressure around 100psi . What do you think? How deep is the scratch? If it was my call .A Little 600 paper on the scratch and lock and load.
1960 f-cub,IH Cub Cadet model 76, 125,
1957 IH350u
1957 IH350u
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