TO35 rear main seal

russ1 · May 30, 2018

Does this tractor have to be split to replace the rear main seal or can it be done from the bottom with oil pan off?
Thanks

Steve@Advance · May 30, 2018

No, the flywheel has to come off to get to it.

How is the rest of the engine? Many times a leaking rear seal is a symptom of loose mains and excess blow-by. If the engine is getting tired, a new seal may only be a temporary fix.

54FergieTO30 · May 30, 2018

(quoted from post at 14:34:11 05/30/18) Does this tractor have to be split to replace the rear main seal or can it be done from the bottom with oil pan off?
Thanks

I believe both a split and dropping the oil pan are required. I think I remember 2 of the fasteners that hold the oil seal are only accessible when the oil pan has been removed

miner09 · May 30, 2018

Yes the pan has to come off as 54 Fergie said to get to the 2 bolts inside that holds retainer in place. Two on the outside.

russ1 · May 31, 2018

thanks for the info although I was hoping it would be easier. It runs well, good compression, no smoke. It sat for several years and I think the seal has just dried out. I will try some snake oil before I split it.

Steve@Advance · May 31, 2018

Also make sure the crankcase vent tube is clean inside.

If the engine has a history of not using oil, running it a quart low will usually slow one from leaking.

We have an old forklift at work with a Continental engine. Trying to run it full of oil is futile. Let it run down to a quart low and it all but stops leaking.

russ1 · Jun 1, 2018

Thanks Steve I will try that.

TO35 rear main seal

russ1

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Steve@Advance

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54FergieTO30

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miner09

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russ1

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Steve@Advance

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russ1

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