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Oliver 70 Rear engine seal

B

Bob Schmor

New User
I have acquired the split rope seal and want help with the replacement. Can it be done without- 1. Splitting the tractor 2. dropping the crank shaft? Can the top half be threaded through?

Bob in MB
 
You can install them without splitting the tractor IF you can get the oil pan off. On your Oliver 70 I am not sure you can get the oil pan off in the tractor with the cast frame/pan the engine sets in. IF you can then you remove the back main bearing cap. You then pick out the old top seal. Then there is a tool that looks like steel Chinese hand cuffs that will pull the new rope into the top side of the crankshaft. It works better if you loosen all the main bearing caps to allow the crankshaft to settle down some to give you more room. Then trim it to just a little longer than the housing on both the top and cap and re-torque the main caps.
 
I guarantee you don't have to split the tractor. You might have to take the engine out of the tub,but no split.
 
I put a seal like that in a 70 I was rebuilding for someone earlier this year. The problem is that the seal groove is about 1/4 inch square for a piece of cork. And, the rope seal that I was supplied would have fit a ford or mopar in the 70's.

My experience with it was that you cannot get the seal in without dropping the crank. I worked it in as best I could with the crank out. If you get it in there you will find at first a lot of drag. On a fresh motor the 6 volt starter could spin it without the plugs. Plugs in no go.

We pull started it and with a limited amount of time the motor will start cold because the seal is wearing in. It so far will not start hot and with limited time I don't know if it is seal drag or the starter. The motor is freeing with more time. And so far it doesn't leak.

Unless your seal is different it's going to be fun.

RT
 
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