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450b Won't move

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Steve H

10-22-2000 18:15:38




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I was working my 450b trying to bust out a maple stump. I was on and off the foot clutch trying to snap the darned thing off then all of a sudden my machine will not move at all. No noise no leaks just won't move. I think that i might have torn the clutch linings off of the clutch disk. I don't think that I broke a shaft because when I tried to shift between gears I sometimes got a little bit of grinding. Is the best and easyest way to get to it is to pull the motor? any guess on the cost to replace the main clutch? I have'nt had this machine long and don't have any manuals yet. I would appreciate any insight or ideas that anyone may have. Thanks!!!!!

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Hal

11-05-2000 07:03:20




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 Re: 450b Won't move in reply to Steve H, 10-22-2000 18:15:38  
My guess is you sheared off all the ring gear bolts. I did the same thing a few years ago exact same symptoms. I was very busy and didn't have time to do it myself so let the dealer repair it. Less than $100 in parts but $1800 in labor. They had to pull engine and transmission. The service manager said he had seen this happened a number of times. Good luck.



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Tim [Ga]

10-28-2000 21:20:43




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 Re: 450b Won't move in reply to Steve H, 10-22-2000 18:15:38  
Install a pressure guage in the center of machine near the seat. The pressure tap is under the drum like plug. Do you get any pressure in forward and reverse. This test is for those JD450 that have a reverser. If the clutch is bad remove the front cowl and lay it face down, then remove the engine and radiator as a unit and set cross ways of the cowl. If no reverser check the clutch.



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D Neubert

10-24-2000 18:41:28




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 Re: 450b Won't move in reply to Steve H, 10-22-2000 18:15:38  
The 450 has a neturalizer valve connected to the clutch pedal there is a pressure port that you should check the pressure to make sure it is in adjustment they are touchey. If you tore the lining off it should still pull some or at least try to. You may have tore the center out of the clutch or the splines off the input shaft or clutch center. You should get a manual and check the pressures before you tear it down because if it is not in the clutch you cant check the trans with out running it. The best way to replace the clutch is to remove the whole front grill and radiator assy. then remove the motor.

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bill

10-22-2000 19:40:26




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 Re: 450b Won't move in reply to Steve H, 10-22-2000 18:15:38  
I would say your best bet is to first get your manuals, parts and service. There may be more than one manual and so there may be a separate manual for the U/C.

Depending upon how it is driven--clutch or TC (torque converter)-- will help you look at the best approach as to troubleshoot the failure and what the costs will be. If it is torque converter driven, you will want to go to NAPA and get a gauge set, and, with the manual, you will be able to check system presures to see if they are within specification at the main control valve. This type of testing will help you find the locus of the failure.

It could be a dry or wet clutch. Then you might have toasted the lining and probably will want to take the engine out and have the flywheel redone and the clutch plate resurfaced. This would be the cheapest failure in terms of cost.

This could be a very costly repair running in the thousands depending what went wrong. The TC type machine is far more costly to fix. Without knowing the full facts it is tough to predict.

To lessen the chances of this happening again try not to use the poping the clutch on any fixed object. Poping the clutch to remove a stump is very hard on the whole drivetrain and tears up a lot of stuff. Example, if your tracks are lose or worn, you can take teeth off a rear sprocket, break transmissions, twist final drives, twist and warp truck frames,.... It is best to cut the stump out from behind if possible or cut to the side in a v pattern and then push it in and the old rule, full power with full speed kills machines.

It is no fun to have that happen and it is always seems to happen when you are far away from home with no tools.

Best of luck

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