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Re: 4440 powershift

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Tim S

04-03-2013 07:08:22

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You need to be in the correct port to check the stand by transmission pressure, I don"t think you were if you got a zero reading,,my thought is the dry drive clutch is most likely slipping, it is in the flywheel.

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04-03-2013 07:28:47

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 Re: 4440 powershift in reply to Tim S, 04-03-2013 07:08:22  
i hope it is the dry clutch, the tractor had a quick coupler in the port , and it looks like the same port as the book says to check i will double check, thanks for the help, can i check the pressure some where else, i removed the valve on the left side and strted the tractor lots of oil there both pressure valve and filter valve

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Tim S

04-03-2013 07:42:23

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 Re: 4440 powershift in reply to ecoin, 04-03-2013 07:28:47  
Some of the ports will not have pressure while in park or nutruel..You can put the tow shifter into the "tow" position,and block the wheels, then going through some speeds, to check the system you will need a gauge pack,each speed will need 3 functions to happen between 2 clutches and 4 brakes,it can be a little complicating to explain,, but if you are getting slippage in the higher speeds it is usually the dry clutch..

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04-03-2013 08:00:19

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 Re: 4440 powershift in reply to Tim S, 04-03-2013 07:42:23  
i will try it in tow and netuel , thanks , it has a little oil comein out of the clutch housing not a lot but didnt want to split it , and find out it was futher back and split again,thanks

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Cliff Nelson

04-03-2013 08:16:27

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 Re: 4440 powershift in reply to ecoin, 04-03-2013 08:00:19  
Oil in the clutch housing can cause the dry clutch to slip sometimes but work other times. I had one this winter that would slip in almost any gear when they brought it to me. Oil leak in clutch housing. I drove it and slipped it hard enough that it burned the oil off the dry disk and everything worked properly after that. Repaired the oil leak and replaced the dry clutch.

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Tim S

04-03-2013 08:39:13

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 Re: 4440 powershift in reply to Cliff Nelson, 04-03-2013 08:16:27  
The dry clutch is a weak link in those, and even worse if they have been turned up, and most of them have been...the last one I did I turned the flywheel to give me .030 more spring pressure, and installed new springs.

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04-04-2013 05:22:14

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 Re: 4440 powershift in reply to Tim S, 04-03-2013 08:39:13  
One way to be sure if the dry clutch is slipping is engage the PTO. If it slows down when the tractor slows down it s the dry clutch. Also if it slips in every gear it s probably the dry clutch.

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