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PTO operation

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wedge40

02-13-2008 10:28:33




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I'm wondering if my PTO is operating normal.

I have a '67 4000 and when I engage the pto it pretty much just slams into operation. I bring the rpms down before engaging but I'm curious if it should be this way or should it slowly engange like a clutch system.

Wedge




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wedge40

02-14-2008 02:33:36




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 Re: PTO operation in reply to souNdguy, 02-13-2008 10:28:33  

Brian in MA said: (quoted from post at 13:33:24 02/13/08) I have similar but opposite problem with some of my "help" (family members) while turning off the PTO on my 5600. The brake stops dead and grinds whatever implement is behind it, especially the tedder. Lowest posible RPMs is the key to as little shock as possible. Funny though, both the 4600 and 5600 start very softly and smoothly when they engage.


So I'm not suppose to just grab the level and pull it into place. I can slowly engage it by moving the lever slowly?

Wedge

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souNdguy

02-14-2008 06:46:13




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 Re: PTO operation in reply to wedge40, 02-14-2008 02:33:36  
On that machine, that lever does not move a sliding coupler.. it actuates a valve... the valve pressurizes a clutch pack.. etc.

soundguy



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souNdguy

02-13-2008 10:37:39




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 Re: PTO operation in reply to wedge40, 02-13-2008 10:28:33  
You don't mention your trans and pto type.. however... once the engage control is on.. the pto pretty much takes off. While on some independent models you can fether the valve in.. there just isn't much provision for it. On my 5000 and 7610s.. I lower rpm as much as possible.. feather the engage ment for about 1.5 seconds.. and even then.. once it really takes.. there is a jolt.. and on a 10-15' mower.. you can feel it and hear it pretty good!

What kind of pto load do you have?

soundguy

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wedge

02-13-2008 11:14:34




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 Re: PTO operation in reply to souNdguy, 02-13-2008 10:37:39  
I have a '67 4000 with independent PTO and 8 speed transmission.
When I use my brushhog I've gotten use to the "Bang" of the PTO engaging. But I just purchased a 3PH woodchipper with a 135lb flywheel. I'm guessing this will take a lot more torque to get it going then the brush hog.

Wedge



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soundguy

02-13-2008 11:19:30




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 Re: PTO operation in reply to wedge, 02-13-2008 11:14:34  
Hmm.. how much you think the blades and blade carrier on your brush mower weigh? My guess is they are both pretty hefty.

Your trans/pto is virtually identical to the one in my ford 5000. Try feathering it in.. take 1.5 seconds to shift it in... but when shifting out.. don't feather it.. etc. Use low rpm as well... ( I know you mentioned you were.. I use as low an rpm as I can that will get the load started without stalling the tractor.. )

soundguy

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Brian in MA

02-13-2008 12:33:24




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 Re: PTO operation in reply to soundguy, 02-13-2008 11:19:30  
I have similar but opposite problem with some of my "help" (family members) while turning off the PTO on my 5600. The brake stops dead and grinds whatever implement is behind it, especially the tedder. Lowest posible RPMs is the key to as little shock as possible. Funny though, both the 4600 and 5600 start very softly and smoothly when they engage.



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soundguy

02-13-2008 16:49:32




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 Re: PTO operation in reply to Brian in MA, 02-13-2008 12:33:24  
Probably got more wear in their hyd clutch packs or hyd valve.. I know my 5000 starts slow for a second too.. but like I say.. i believe it is wear.. etc..

soundguy



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