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Farmall & IHC Tractors Discussion Forum

clutch clearance question

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Diana

08-10-2003 13:14:30

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Hi again,
I have an IH350 Utility D. It was sticking in first gear. I TRIED to adjust the clutch. The "book" says there should be a 1/8" clearance between the clutch release bearing and levers. Before I started adjustment, there was no clearance at all. I tried to get the clearance, but there is still zero clearance.
It also indicates there is supposed to be 6.5 inches from the bottom of the curve of the pedal to the rim of the floor and the most I can get is 5.75 inches there. I see no way to expand that width.

I decided to go ahead and adjust the TA which adjusted perfectly. I can now shift into the 5 gears and reverse a lot more smoothly and the TA shifts really nicely, too. I need to know, though, is there a problem because there is no clearance? I don't want to wreck something. I have to say, too that I sure didn't think a tractor could go SO FAST in 5th gear!!! Scared the heebeejeebees out-a-me! WHEW!

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Hugh MacKay

08-10-2003 18:44:18

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Re: clutch clearance question in reply to Diana, 08-10-2003 13:14:30

Diana: Really any young lady who met her husband by chalanging a drag between Mustangs and Camaros shouldn't flinch at the speed of a 350.

I guess what you are saying on the 350 clutch pedal is you are not getting enough total travel of the pedal. Do I follow you correctly? Having never had a utility I am not exactly familiar with the pedal. The Farmall models had a set screw below the pivot point of the pedal, where you could increase or decrease the total travel of pedal. Then of course you could adjust the free travel on the linkage to clutch lever. The chassis is the same on Farmall and Utility. Engine, torque tube, rear end and rear axle carriers are the same castings on both tractors. I think if you look below pivot point of clutch pedal you will see the set screw, actually a 1/2" bolt. The way in which the left floor board is may have some effect, I'm thinking along the lines of possible alterations or modifications.

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Diana

08-10-2003 20:06:50

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Re: Re: clutch clearance question in reply to Hugh MacKay, 08-10-2003 18:44:18

Cute, Hugh!
My mustang had a roof and some fenders not to mention seat belts! The field is a bit bumpier than the road, too. I am working on getting some fenders, by the way.

I do have travel on the clutch. It is working wonderfully now. It's just that the diagram shows that there should be 6.5 inches between the bottom of the curve of the pedal and the floor board rim and I find it impossible to get that measurement. I'm getting around 5 and 3/4. I didn't know if this was a problem.
Wait till my next question! Hydraulics stuff scares me to death!
Diana

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08-10-2003 16:26:24

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Re: clutch clearance question in reply to Diana, 08-10-2003 13:14:30

Hi, the main objective is to have enough clearance between the pressure plate fingers and the release bearing such that the release bearing does not rotate constantly. The only time the release bearing should rotate or contact the pressure plate fingers is when the clutch is depressed. If the release bearing rotates all the time it will eventually sieze and wear the fingers on the pressure plate.
One of the possible reasons that the clearance can no longer be achived is that the clutch friction disk is worn. As the clutch disk wears the pressure plate fingers clearance to the release bearing decreases.

Re 5th gear, we had a 300U many years ago and it was the fastest tractor on the road in the neighbor hood.

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Diana

08-10-2003 16:36:57

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Re: Re: clutch clearance question in reply to JB, 08-10-2003 16:26:24

>>>>>One of the possible reasons that the clearance can no longer be achived is that the clutch friction disk is worn. As the clutch disk wears the pressure plate fingers clearance to the release bearing decreases.<<<<<<<<
I don't understand this since even when the clevis is not attached, there is still not enough to adjust. The pedal stop is hitting the bearing cage and I see no adjustment there to raise the pedal to the required 6.5 inches.
Also, how would I know if the release bearing is rotating constantly? I'm mostly deaf so would not be able to hear that. Is there another way to indicate this?
Thanks for your help!

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08-11-2003 18:03:51

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Re: Re: Re: clutch clearance question in reply to Diana, 08-10-2003 16:36:57

Hi, it has been 40 years since I worked on 300U. I believe there was an inspection hole on the bottom of the bell howsing/torque tube that would allow you to see the pressure plate/release bearing. With the tractor idling and in neutral and brakes locked you should be able to see if the release bearing is turning or not.
Is there grease fittings on the release bearing carrier assembly or has my memory of 300U become muddled with JD 420 that we owned at the same time ?

Great tractor the 300U, would pull a 17 tooth spring tooth harrow in heavy soil in 4th direct drive. The only down fall was the small gas tank and you had to fill it 3 times a day.

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Diana

08-11-2003 19:19:07

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Re: Re: Re: Re: clutch clearance question in reply to JB, 08-11-2003 18:03:51

Thanks for the tip JB, I'll check it out tomorrow and see if there's a way to peek inside. It's a 350 diesel and I swear the gas hasn't budged yet!

Diana

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