Tractor - Anyone able to figure this one out

kincaid

Hi All

I got a friend who has got a 1455xl.
When its going uphill with the revs on the tractor is fine, but if he takes his foot of accelerator completely its just stalls and then rolls back, if he puts his foot on pedal again and gives it a rev away she goes again.
Clutch pedal bites goes up a fair bit before its bites but it doesn't seem to be slipping at all Its just when you lay off the revs it happens but she still should crawl on anyway.
Oils were all checked and all is at correct level too.
Any ideas guys

Thanks

Farmer

Classical Torque Amplifier (splitter) symptoms. Get Googling

[Edit] Here's a good explanation, from a different model but same idea

http://en.allexperts.com/q/Tractor-Repair-838/2008/7/International-574-torque-amplifier.htm

kincaid

Thats great thanks, he does not have the problem in 1 or 2 gears at all just the others.
I wonder if its an expensive repair if it is the problem

kincaid

ok just been told that The tractor does not have a torque amplifier and its normal to experience this with a turbo oil clutch

Farmer

Oops, my mistake - ah well, I learn something new everyday

kincaid

Seems what was happening with the tractor slippage /oil shear in the turbo clutch oil because the speed of the engine is insufficient to give drive

Man of Aran

kincaid wrote: »

ok just been told that The tractor does not have a torque amplifier and its normal to experience this with a turbo oil clutch

For clarification, what is meant by " turbo oil clutch" exactly?
Surely not the engine turbocharger, if one is fitted, and if so how would that create the symptoms described earlied?

kincaid

oil turbo clutch, there is a flywheel on these and they are filled to the correct level with oil....From what i can gather on normal tractor the main clutch takes up the drive slippage and wear on taking up drive , but with a " Turbo clutch" all the slippage is taken up in the oil...not sure if the normal clutch could last long with power of tractor/ turbo of these bigger IH tractors

vincenzolorenzo

Is that system not used on a lot of modern tractors (I'm thinking JD6400 and newer) - several clutch packs immersed in oil? The concept of a dry clutch wearing out every couple of thousand hours doesn't apply to these types of clutch I thought? I've driven several tractors like these and never experienced these symptoms?

iverjohnston

Two different systems alltogether. The John Deere "PermaClutch" is a lot like a PTO oil immersed clutch pack, while the 1455 has , as a previous poster stated, an oil filled fluid flywheel link between the engine and the conventional dry clutch disk. Much the same as the older Fendt "Turbomatic" system. Google these terms and you will see.