Twin city JT

Mark Poss

Well-known Member
Im new to Minneapolis moline and was wondering if the clutch should be engaged when the
tractor is idling? I know that they say John Deere's should be to prevent the pulley bearing from
turning. Thanks Mark
 
For 30 years or more we have powered an auger with a U and let the tractor idle between loads with the clutch disengaged, sometimes for quite lengthy times. No problems yet. I have never seen anything in the operators manual that is contrary to this practice.
 
It probably should be engaged on an MM, too. LEaving it disengaged is a bit like leaving a foot clutch pressed down for long periods of time... eventually, it shortens the life of the throwout bearing.
 
No "oil splash"... just that it makes the Deere eqivalent of the throwout bearing spin when disengaged. When engaged, the bearing does not spin.
 
I have been told by many on here to.leave it disengaged? I also have had thoughts on this problem as I to have not had any Molines till now. All of mine were J.D. till now, But if I remember correctly that the Deeres had the oil splash and to keep bearing coated with oil you had to rotate the clutch make sure the splash worked etc. To lube the bearing? Reason for engagement i guess? And the MMolines was set up as if your clutch was a foot type but in a hand clutch style And should only be engaged during work operations only.
 
I'm not familiar what the JT stands for but if the clutch is the hand operated over-centre type then you can leave it disengaged with the engine running indefinately. Unlike a spring operated foot clutch there is no load on the thrust bearing when disengaged. Load only comes on during the over-centre engagement time. Please forgive me if we are talking about different things.
 
No, the reason for engagement on a Deere is that the bearing only spins when the clutch is disengaged. The bearing only gets lubed when the clutch is disassembled and the bearing packed in grease- i.e. just about never. There is no oil splash happening in the Deere clutch.
 
Yes, what i ment was in the bearing when disengaged on the deere for the oil slinger. I might had word difficult. So. . What say the Moline clutch ? Is it the same or no? I have a ZTN 1947 and I also wonder if it works kinda the same if you park to engage it? While setting?
 
JT is the MM/Twin City forerunner of the Z, it had a Waukeshaw engine but there was a factory conversion kit to install the 186 engine from the Z.. I have a 1937 with the Z engine.
 
Well kinda what i thought if it is engaged would cut down on the bearing wear for sure. I use to do.mine like that so i posted a while back few guys said not to as it was diff than J.D. models? Really not sure as this to is my first Moline
 
Graham and John are both correct. Actually the only time the clutch sleeve rotates in the Throw-Out Collar (Throw out Bearing) is when it is engaged. When it is disengaged the whole clutch assy. is stationary. In fact if you engaged the clutch in neutral you are wearing out parts. That's why the collar has a grease fitting on it and the manual says to lube daily. Not necessary unless you are running 12Hr a day or running as a loader tractor. R.JT.Z.U.G all the same. Prove this to yourself. Take the clutch cover off on the left side. move the clutch both ways and see what happens. Might want to grease it while you are at it.
MMDEL
 
I just picked up a JTS. The clutch cover you referred to. Mine has a hole in it to access the grease zerk for the throw out bearing. There was a cork plug in that hole. Is a cork what is supposed to be in that hole? The cone thing that pushes on the clutch on mine is stuck on the shaft. I'm currently trying to get that free right now.
 
Interesting question.A JT is one model I do not have so don't remember from seeing them at shows. I know most all of the old Twin City models had the square cover with the flat spring clip to hold it in place. But the JT was a little different production using an engine not made by Twin City or MM. Maybe the later Js had the cover. Because I'm thinking the ones I have seen. the clutch housing, trans and diff, rear axle is identical to the Z. As far as the cork, don't know if that was a genuine factory part or not. I suspect it was placed there to keep the mice out as they like to get in those kind of places to nest.
MMDEL
 

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