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Discussion Forum
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Allis chalmers B clutch problems

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larry

08-22-2000 08:57:24




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Could someone give me some info on a shifting problem. I recently installed a new throw out bearing, clutch and pressure plate because it was grinding gears with cltuch disengaged. I still have the same problem but not as bad. I have the clutch adjusted so when pedal is barely pressed it disengages the clutch but I can't shift gears. It acts like the transmission is turning and I have to wait for a while (stop turning) to shift from nuet to any othe gear. I read about a "wick" adjustment. Would this cause the problem? Thanks for any info.

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Dick L

08-22-2000 19:22:22




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 Re: allis chalmers B clutch problems in reply to larry, 08-22-2000 08:57:24  

Sounds like low oil or too light of oil in the transmission. Read the post above about the pinion shaft bearing. It could be the bearing does not have the correct tension. It can be checked and adjusted by removing torque tube from the transmission and removing the cap that covers the end of the pinion shaft. (if all else fails)



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Larry M

08-22-2000 10:17:42




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 Re: allis chalmers B clutch problems in reply to larry, 08-22-2000 08:57:24  
Larry, I've been experiencing the same problem with my B. I just replaced my oil wick for the clutch pilot bushing which is a major chore as it is a devil to get the new one back in. The old wick was so dry that it broke off in pieces when I was driving it out. No doubt in my mind that oil was not getting to the pilot bushing. I think the lack of oil was causing the shaft for the transmission to drag in the pilot bushing which results in the transmission turning even though the clutch is disengaged. It is easier to shift now although it still takes several seconds before the transmission stops turning. It could be that I haven't run it enough since I put the wick in for it to get real saturated yet. The only time I really had a problem with shifting was when I had let the clutch out when is was in neutral then disengaged the clutch and tried to get it back into gear. If you keep the PTO engaged it makes shifting a lot easier.

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larry

08-22-2000 11:13:18




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 Re: Re: allis chalmers B clutch problems in reply to Larry M, 08-22-2000 10:17:42  
Hi Larry. You have described my problem exactly. When i am in neut and engage the clutch then disengage it to shift into gear, this is where the big problem is. I have to throttle the engine way down and wait for the trans to quite turning. I have a 60" woods belly mower on this so it is a real pain trying to mow. Thanks for the info. I will do some research on how to change this wick.



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larry

08-22-2000 11:11:57




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 Re: Re: allis chalmers B clutch problems in reply to Larry M, 08-22-2000 10:17:42  
Hi Larry. You have described by problem exactly. When i am in neut and engage the clutch then disengage it to shift into gear, this is where the big problem is. I have to throttle the engine way down and wait for the trans to quite turning. I have a 60" woods belly mower on this so it is a real pain trying to mow. Thanks for the info. I will do some research on how to change this wick.



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Ted Seifert

08-22-2000 09:45:43




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 Re: allis chalmers B clutch problems in reply to larry, 08-22-2000 08:57:24  
The resistor is only in the circuit when the switch is fully pushed in (low charge). In all other switch positions the resistore is shorted out and the generator is in high charge. In the low charge position the resistor is in series with the field winding of the generator. Check for miswiring, perhaps thre field and the armature wires are exchanged where they connec to the generator terminals. Good luck

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DanD.

08-22-2000 09:04:05




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 Re: allis chalmers B clutch problems in reply to larry, 08-22-2000 08:57:24  
How long of a time do you have to wait for the tranny to stop turning? When the tranny is hot and with thin oil in the tranny (assuming your B has hydraulics) it may take several seconds for everything to stop turning before you can shift. Does it slow down faster when the tranny is cold?



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larry

08-22-2000 11:04:41




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 Re: Re: allis chalmers B clutch problems in reply to DanD., 08-22-2000 09:04:05  
Hi Dan, As soon as I started it after the clutch change it was difficult to shift. It takes aprox 20 sec to slow down and I noticed it is the worst if you are in neutral, let the clutch out push it back in and try to go to another gear. It will slow down much quicker if I throttle the engine way down. It seems like something is still trying to drive the trans with the clutch disengaged.



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