14: clutch in an 8700

Joe Pro · Jan 4, 2019

I am doing an out of frame overhaul on an 8700 with a later engine in it from a TW25.
The owner bales with this tractor, so we thought it would be a bright idea to upgrade the 13" clutch to a 14".
We did some research and believed it would all work.
I got a flywheel and throwout bearing carrier from a TW25.

I am not attempting to install the engine and it won't " fit".
It seems the flywheel is hitting on two raised areas of the 8700 bellhousing at about the 4 and 8 o'clock positions.

Am I missing something simple, or will it plain not work?
Thanks.

riveroadrat · Jan 4, 2019

The block casting must be the same as it fits. The tranny casting is probably different. A dealer or shop that knows them might be able to tell you. Bern probably knows.

Bern · Jan 4, 2019

I've never tried to do what you're doing, but I suspect you're right, there is not enough room inside the transmission
casting to allow the clearance.

Two options I can think of:

1) grind away the clearance that you need if it won't require removing a lot of material.
2) go back to the 13" clutch. A non-turbo 401 engine will never make enough power to slip a 13" metallic clutch. Even if you
put the turbo on it from the TW25, the 9700 did just fine with the 13" clutch.

Be advised that if you do go back to the 13" clutch, from factory at least, the 9700 had either more springs in the pressure
plate, and/or they were heavier than the 8700. I don't have a clutch chart in front of me to verify the exact details.
Stated another way, your existing 13" clutch would likely slip behind a turbo engine.

14: clutch in an 8700

Joe Pro

Member

riveroadrat

Well-known Member

Bern

Well-known Member

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