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Author  [Modern View]

05-27-2014 13:48:41

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Hi. I got an International Harvester, an old '65, in January. I noticed immediately when I'd plow snow into a pile and put front end under pressure, it would lock in gear and couldn't get it into reverse. If I kind of gave it some gas and tried to shift quickly at same time, I could usually get it out of gear with some effort. Then, this spring, when I began cleaning up the barnyard (horses/hay), again if I drove it into the pile and put front end under pressure it would lock in gear. Sometimes if I raise the bucket it would change the pressure points, I guess, to the point I could get it out of gear, but ... It shifts fine when it's not under load on the front end. Wondering if you could tell me what the problem might be.

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The tractor vet

05-30-2014 06:45:07

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 Re: repair in reply to dougster, 05-27-2014 13:48:41  
Well knowing the model other then a 65 I H would be a HUGE help here . But since you did not say i will guess that you need to do a clutch and T/A adjustment . If it is a 06 model then you also will need to do a three step adjustment starting with the main clutch then the transmission brake then the dump valve , this is for all I H tractors with a Hyd . T/A . If it is one with a mech. T/A then it is mostly just getting the clutch and T/A linkage adjusted with sometimes some adjustment to the T/A handle

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05-29-2014 08:46:05

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 Re: repair in reply to dougster, 05-27-2014 13:48:41  
Hmm, no sign of our friend dougster...

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05-28-2014 08:58:48

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 Re: repair in reply to dougster, 05-27-2014 13:48:41  
"Pressure on the front end" has nothing to do with your problem, unless the tractor is a 4x4, or is coming apart in the middle. It might not hurt to check the bolts that hold the tractor together for tightness, just in case, but it's almost certainly not a factor here.

The issue is pressure on the REAR end. That's why lifting the bucket full of manure helps. The weight of the manure pushes down on the front and lifts the rear wheels slightly, relieving the pressure.

I assume tractor, but IH made dozens of different models in 1965. Please be more specific.

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Alan K

05-28-2014 07:45:30

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 Re: repair in reply to dougster, 05-27-2014 13:48:41  
Im not sure how the IH's are but I think that was a common problem with torques. My M5 with a loader does the same thing. It gets aggravating. It might be a good idea to post this on the IH forum as well if you haven't already. There might be a problem with the "MCV" (multiple control valve) valve also which if I remember correctly controls the TA.

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05-27-2014 18:33:45

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 Re: repair in reply to dougster, 05-27-2014 13:48:41  
I agree with what the others said about the TA being the culprit, To find out for certain do what ever you do to make it hard to get out of gear but pull the TA back first. If it comes easily out of gear then adjustment is in order. Until you get that done keep using the TA, beats wammer jammering the shifter to get it out of gear which will cause you more problems sooner rather than later.

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05-27-2014 17:50:35

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 Re: repair in reply to dougster, 05-27-2014 13:48:41  
If it has a "TA" the main clutch is not letting go and the TA helps keep it in gear. Our 300 used to do that. Finally got the clutch adjusted up correct. Can be a real PITA.

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Owen Aaland

05-28-2014 13:54:55

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 Re: repair in reply to jeffcat, 05-27-2014 17:50:35  
Quoting Removed, click Modern View to see

Actually the main clutch has nothing to do with the transmission being hard to get out of gear in this situation.

What actually happens is the TA clutch is not fully released when the main clutch is released. As the tractor rolls backwards the ramp and rollers lock up in the TA and since the TA clutch is not released the TA assembly cannot turn backwards and there is pressure on the transmission gears as the tractor is held in place. Pulling back on the TA lever will release the TA clutch which allows the planetary gears in the TA to spin so the transmission input shaft can rotate backwards releasing any pressure on the transmission gears. The transmission can the be shifted.
The purpose of the link between the main clutch shaft arm ans the TA clutch shaft arm is to release the TA clutch just slightly after the main clutch is released as the clutch pedal is pushed down. When the clutch pedal is released the TA clutch engages just before the main clutch. If the TA clutch is not released you will have shifting problems. If the TA clutch is released before the main clutch, as the pedal is released the main clutch will engage and the tractor will start to move with the TA pulling on the low side. As you continue to release the pedal you will feel the tractor shift speeds as the TA clutch locks up.

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Owen Aaland

05-27-2014 15:28:47

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 Re: repair in reply to dougster, 05-27-2014 13:48:41  
It would really help if we knew what model tractor you have.

My guess is that your tractor has a TA and the linkage is not properly adjusted so the TA clutch is not releasing with the main clutch pedal.

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05-27-2014 15:05:06

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 Re: repair in reply to dougster, 05-27-2014 13:48:41  
Might check the engine to transmission bolts, make sure they're tight.

Only other thing that comes to mind is the clutch is slipping under heavy load and heating up the pressure plate. Check your free travel on the pedal.

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05-27-2014 14:54:42

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 Re: repair in reply to dougster, 05-27-2014 13:48:41  
One reason could be that the Clutch is not fully releasing the clutch plate all the way with pedal down,.( engine keeps dragging on the transmission shaft).

Try adjusting the rod so there's less pedal free play (3/4 inch or so)

if that don't solve it than it is prob time to split the tractor to see what the problem might be cause there ain't much else one can do without splitting the tractor.

There could be other reasons like a dry/stuck pilot bearing on the transmission shaft or worn clutch components etc

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