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Allis Chalmers Discussion Forum
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WD clutch pedal and hand clutch

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Chad B.

07-05-2005 07:26:38




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I have a question regarding the hand and foot clutch on a WD. I'm pretty ignorant when it comes to this tractor, so please forgive me if I sound like a total mope. Anyhow, when starting from a dead stop, I let out the foot pedal and pull back the hand lever. As the clutch engages, I let out the foot and fully pull back the hand lever. Tractor is off and running. My question is, if I stop, do I push the hand clutch forward again and do the same steps when I go to take off? Do I just use the foot clutch? What is the purpose of the hand clutch? Can I use one or the other? Thanks!

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BushogPapa

07-05-2005 16:39:00




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 Re: WD clutch pedal and hand clutch in reply to Chad B., 07-05-2005 07:26:38  
Anytime I want to stop with my WD-45 and bush hog, I use the Foot Clutch, and Brakes.... Otherwise the implement may coast for 5 minutes... You can stop a bush hog using this method and not coast more than 3 feet.. I would Never use an over-running clutch on the PTO..it just is not safe, if you cannot Force the bush hog to a stop.. Ron..



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Eldon (WA)

07-05-2005 19:18:23




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 Re: WD clutch pedal and hand clutch in reply to BushogPapa, 07-05-2005 16:39:00  
Your brush hog must not have much of a flywheel.....I'd hate to try to "brake stop" my 6' with my 170! Mine usually stops real fast by itself (when I hit something)...otherwise no need to stop it quickly. Sounds like a quick way to take out your pto gears on a 45..... .



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BushogPapa

07-05-2005 19:34:08




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 Re: WD clutch pedal and hand clutch in reply to Eldon (WA) , 07-05-2005 19:18:23  
If you had ever run an AC-60 combine much in soybeans, you would know that this is standard practice to STOP the combine before a Rock can get to the cylinder..!!! Never broke a WD-45 pto doing this..!! Yea, my bush hog is 6' and is a "Bush Hog" brand. If some stupid person walks up to the tractor with the Bush Hog running..I want it to STOP and I mean NOW....!



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Eldon (WA)

07-05-2005 12:43:08




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 Re: WD clutch pedal and hand clutch in reply to Chad B., 07-05-2005 07:26:38  
Just to clarify a few things:
You should use the foot clutch when shifting gears whenever possible to avoid unnecessary wear and possible gear grinding. For example if you are brush hogging and need to back up, you must release the hand clutch first (unless you have an overrunning clutch on the pto shaft), then push in the foot clutch and quickly shift into reverse. Release foot clutch, then engage hand clutch to back up. If you don't have an overrunning pto clutch, the brush hog WILL drive the rear wheels unless you disengage the hand clutch!! Try just disengaging by foot and you will keep going as the hand clutch ties the pto and transmission together!
The hand clutch operates in oil (or at least it should) so it can be slipped without burning like the foot clutch. This makes it very useful for inching along when the job gets tough, and you may not have to shift down a gear like other tractors would have to do.
Using the hand clutch also keeps the hydraulics going as well as the pto. This is how Allis Chalmers obtained live pto and hydraulics on their tractors for many years. For example, when mowing and you come to an obstacle you can release the hand clutch, raise the mower, move past the obstacle, lower the mower and go.
If your hand clutch is working properly you can also stop the tractor to get off to open a gate, pick up rocks, or load bales, etc. without taking the transmission out of gear. This saves a lot of time climbing on and off the tractor as most of the time we just stepped up on the drawbar and pulled the handclutch and went to the next rock/bale. I'm sure AC would never endorse driving like this, but on flat ground and with responsible drivers we never had a problem.

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don dittmar

07-05-2005 07:50:16




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 Re: WD clutch pedal and hand clutch in reply to Chad B., 07-05-2005 07:26:38  
Chad,
The hand clutch is a transmission clutch, while the foot clutch is the main clutch and stops everything. When you use the hand clutch, the pto/hyd pump is live as this clutch only stops power going to the transmission. The foot clutch stops power to everything. You should be able to start/stop/shift gears with either clutch, but if you are going to engage the pto you need to do that with the main foot clutch. Just remember the foot clutch stops everything, and the hand clutch only stops foward motion of the tractor

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Chad B.

07-05-2005 08:14:55




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 Re: WD clutch pedal and hand clutch in reply to don dittmar, 07-05-2005 07:50:16  
Thanks for the info, Don. Can I then leave the hand clutch in the rear position at all times without hurting the tractor/transmission (knowing that the pto/hyd is then always live) and just use the foot clutch for driving purposes?



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Kevin Bismark

07-07-2005 18:33:21




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 Re: WD clutch pedal and hand clutch in reply to Chad B., 07-05-2005 08:14:55  
I alway"s left the hand clutch pulled back unless I wanted to keep the pto going and stop the tractor, it"s a hell of a clutch, the guy that designed it was a smart guy, the only deal is don"t leave the tractor sit for very long with the hand clutch in the forward position I did that and had to tie wire the clutch handle back to use it until I found an old guy that knew how to fix it, wrote it down in the tractor manual and havent" looked at it in over 25 years after we got rid of the tractor, for some reason if you leave the handle forward for long enough it just won"t stay engaged for more than 20 seconds or so, after we got the right answer it only took 20 minutes to fix it with no parts needed. It"s a shame that we lost so many tractor companies 30 years ago, they all had their strong points, all were straight forward and simple for the most part, if you could build a factory and make exact new copies of them you probably couldn"t sell them here with the regulations we have but if you made them in China you could import them, go figure..

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Chad B.

07-05-2005 09:14:59




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 Re: WD clutch pedal and hand clutch in reply to Chad B., 07-05-2005 08:14:55  
Actually, in re-reading that I have it backwards. In my mind, I think that I don't have to mess with the foot clutch at all - as long as I know that only when I depress the foot clutch do I truly disengage all the systems. For simply starting and stopping driving, I can just use the hand clutch. Hand clutch forward to disnegage and rearward to engage. Does that sound right?



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souNdguy

07-05-2005 11:09:14




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 Re: WD clutch pedal and hand clutch in reply to Chad B., 07-05-2005 09:14:59  
You can use the hand clutch in situations where you still need pto.. but need to stop forward motion. For example.. if you were pulling a hay bailer.. and it started to load up.. you could pull the hand clutch.. that stops forward motion.. but leaves the pto on so that the bailer can clear itself.. once sufficiently clear, put the clutch back in and go. On a non live pto machine you would have to do a quick one/two.. clutch.. shift out of gear, and then unclutch to get power back to the pto before it spun down.

I'd use the foot clutch to stop and start motion.. and the hand clutch when i had powered pto stuff.. Like if i was mowing, and needed to stop motion to rearange my hat.. or take a drink.. but didn't want to let the pto spin down.. I'd use the hand clutch in that situation..

Soundguy

Soundguy

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