Sherman Question

BradTN

Member
I split my 8N today. I think the tractor has about 1500 hrs. on it. I plan to check the clutch set up and I will probably do the front and rear crank seals. Maybe new rod and main bearings. I think I can handle most of that.
I'm not sure where to start on the transmission side of things. I have the Sherman 2 speed and there seems to be a lot of oil in the tractor housing. I don't know if the oil is from the Transmission,the Sherman or the engine.
I would like to get everything sealed up in this area, so what should I do now ? Does the Sherman need to come out ? What seals need to be changed ? Does the Sherman have it's own lube ? If so, surely that should be changed. All guidance appreciated.
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First it is a three speed/range Sherman not two speed. Since tractor
is split put a floor jack under bellhousing and lower to floor and within
an hour you will see if your input shaft seal is leaking. If it is remove
the 4 bolts and take the nose cone off once removed take the three
Allen head set bolts out and replace seal in nose cone. Drain and
refill case
 
Brad,While I had it split apart I would replace the front seal in thet Sherman regardless if it is leaking or not.It is old and hard and could leak as soon as you put it back together.So why not replace it NOW! and save your self a headace later.
 
Oh,as Kirk said that is a 3 speed Sherman combo,very desirable.Slide the shifter handle outwards in neutral position and pull back for low range.
 
Oh,as Kirk said that is a 3 speed Sherman combo,very desirable.Slide the shifter handle outwards in neutral position and pull back for low range.

That's not where low range is located on the Sherman combination transmission.

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(quoted from post at 17:28:58 08/25/20) First it is a three speed/range Sherman not two speed. Since tractor
is split put a floor jack under bellhousing and lower to floor and within
an hour you will see if your input shaft seal is leaking. If it is remove
the 4 bolts and take the nose cone off once removed take the three
Allen head set bolts out and replace seal in nose cone. Drain and
refill case

OK, so thanks to all who have corrected me on what I'm dealing with. My Dad was a plumber back in the day,(passed away in 1986) and he purchased this 8N with a trencher attachment on it for trenching water lines and such. The Sherman apparently improved the trenching and road speed capabilities. I removed the trencher unit and have used the N for box blade and bush hogging for about 25 years. The radiator went bad this summer, so I started that project and kept finding other things to do for it while I have it this far down.

So, apparently I can replace the Sherman front seal and gear oil without taking the unit out That's good...I was hoping to not need to remove it. How about the tractor transmission oil ? Can that get by a seal or gasket back there ? I want to re-seal everything that I should while I'm here.
 
If you are replacing the input shaft seal you will need to also change the gasket on the nose cone. There should be no reason to remove the sherman unless it's leaking where it mounts to trans wall.Trans
oil should be changed at the same time. since the sherman get it's oil from the main trans Via a slinger if you have any water in your trans it will also be in the sherman. After completing your repair
again lower the bellhousing to make sure the gasket is properly seated and there are no leaks. This has save me from splitting the tractor again more than once.
 
(quoted from post at 11:53:23 08/26/20)
...oil should be changed at the same time. since the sherman get it's oil from the main trans Via a slinger if you have any water in your trans it will also be in the sherman. After completing your repair
again lower the bellhousing to make sure the gasket is properly seated and there are no leaks. This has save me from splitting the tractor again more than once.

OK. Shares it's oil with the main Transmission. That's one thing I was wondering. And lower the front to the floor to check for leaks. I guess the trans. oil will cover the area and get out if it can. Seems like a very good idea to check that.
 
I flipped the engine as prep. to take the oil pan off and tilted the tractor to check for leaks...and...it leaks. The input shaft seal for sure, and the gasket at the transmission seems to be seeping.
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