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Case Tractors Discussion Forum
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Double Clutching

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CK from ON, Can

04-03-2006 12:28:11




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It was mentioned in a post about synchro and non-synchro transmissions that you could 'double-clutch' any tractor and shift while moving. What is this and how is it done? Can I try this on a 440 without triple range?




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CK from ON, Canada.

04-03-2006 20:29:58




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 Re: Double Clutching in reply to CK from ON, Canada. , 04-03-2006 12:28:11  
Thanks for all the replies. I'm hesistant to try this out because of the experience required, but I'd definetly not do it under heavy load. It is mentioned that double clutching works best for sliding gear transmissions. I believe a Case 440 has such a transmission, so I'll give it a shot...



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Paul In ON

04-03-2006 19:06:41




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 Re: Double Clutching in reply to CK from ON, Canada. , 04-03-2006 12:28:11  
CK, may be a thing with us from ON. A question for the rest, is double clutching the same thing a shifting on the go? If I want to get from thirs to fourth in road gear on my Case 430, I have to start in 3rd and shift to fourth when the tractor's rolling. Same thing? PAul



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jdemaris

04-03-2006 19:00:33




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 Re: Double Clutching in reply to CK from ON, Canada. , 04-03-2006 12:28:11  
If you don't have a feel for it, double-clutching can make it shift even harder. And, if you DO have experience, you can often shift just fine by timing your shift properly and not worrying about double-clutching. Most of the old road-rigs didn't have any synchros and a person with experience would rarely grind a gear.

I don't know anything about your particular transnission, but double-clutching is usually associated with sliding-gear transmissions. Some tractors have constant-mesh, collar-shift, non-synchro transmissions, and they will NOT shift well not matter what you do (while moving).

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Can't even use my name

04-03-2006 14:12:41




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 Re: Double Clutching in reply to CK from ON, Canada. , 04-03-2006 12:28:11  
This is also a method used for shifting large trucks and semi's if you like replacing clutches. The same thing can be accomplished without using the clutch. Just a matter of timing, feel, and experience.



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Ray F

04-03-2006 13:51:52




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 Re: Double Clutching in reply to CK from ON, Canada. , 04-03-2006 12:28:11  
1. Disengage clutch
2. Slip into neutral
3. Engage clutch
4. Match engine speed with ground speed of desired gear
5. Disengage clutch
6, Slip into desired gear

note: Does not work under heavy pull.



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