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Hydro ?
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- junkman1946
- 10+ Years
- Posts: 761
- Joined: Thu Oct 19, 2006 2:31 pm
- Location: Cape Cod Ma.
Hydro ?
I got aproject in the planning stage, Looking to make a "Cubster" like a J.D. Gator. I want to tie two hydro transaxles together on a modified "walking beam" tandem suspension. My question is if a attach a drive shaft to the rear stub shaft on the forward pump will it drive the rear trans at the same speed. I think all those t.a.s are the same ratio. Do you think its doable or am I just "blowin smoke". Thanks, Frank
- wdeturck
- 10+ Years
- Posts: 949
- Joined: Mon Dec 08, 2003 6:15 am
- Location: PA Oakmont 15139
I don't think that will work since you are just driving both hydraulic pumps at the same speed. The rear end is driven by the hydraulic motor which is really controlled by the speed control and what I think are called "squash plates" that control the pressure to the motors. I think it will be hard to synchronize this operation. If you get a gear tranny with a rear PTO for the front and connect to the main shaft of the rear tranny and they are in the same gear they will travel at the same speeds. I'm not a hydro person so someone else may have other ideas. This is how articulating tractors aaare made but they havw room between the wheels where the wheels are close together and there's not enough room between the wheels.
The Geezer from IHregistry.com which crashed and is now Cub Cadet Collectors.
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- Team Cub
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- Joined: Sun Feb 02, 2003 2:59 pm
- Zip Code: 55319
- Circle of Safety: Y
- Location: MN
Having spent all of about 30 seconds thinking about this, and about the same looking at a diagram of a hydro, I agree with The Geezer. I think it would be nearly impossible to synchronize the speed controls of the 2 hydros. They will be constantly fighting each other because of different speed settings.
Alternatives that I think have a better chance of working include:
- Using gear drive transmissions as The Geezer suggested.
- Just using the differential section of the second unit and drive it from the hydraulic motor. This would require some serious machining work.
- Forget about driving the second axle. Use one transmission and an undriven tag axle.
Alternatives that I think have a better chance of working include:
- Using gear drive transmissions as The Geezer suggested.
- Just using the differential section of the second unit and drive it from the hydraulic motor. This would require some serious machining work.
- Forget about driving the second axle. Use one transmission and an undriven tag axle.
- junkman1946
- 10+ Years
- Posts: 761
- Joined: Thu Oct 19, 2006 2:31 pm
- Location: Cape Cod Ma.
Thanks wdeturck and Jim that clears a lot of confusion up for me . We had a guy up here try that with two hydros- kept snapping the driveshaft between the two of them. I first thought it was an alinement problem, but your rationale sounds better. I want to make a "truck" type vehicle like the 582 in the photo gallery, but I want to refine the suspension a little more so it will traverse uneven ground. Looks like a tag axle it will be.
1948 Cub F,1962 Original,1971 C.C.model86, WheelHorse and C.C. mini pulling tractors, C.C. models1450 , 682,106,123, Ariens GT17 with loader,Jacobsen Powermax loader and backhoe 8 more Cub Cadets in the shed waiting to go under the knife and spray gun.
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- 10+ Years
- Posts: 2338
- Joined: Sat Apr 10, 2004 6:12 pm
- Zip Code: 40218
- Circle of Safety: Y
- Location: KY, Louisville
It can be done. Kelly Birkey has built several twin hydro customs - an articulated front loader, an art dump bed, fork lift etc. I don't have all the details, but the speed control lever on the dash is connected to one hydro like a stock setup of a Cub Cadet, and then uses a tele-flex or push pull type cable (I don't know the correct term) from the speed control cam assembly of the first hydro to the speed control cam assembly of the second hydro so both are in sync so to speak. What ever speed the cam assembly on the first one is set to, the second is set to the same setting. The cable he uses is used on a Case IH combine I believe is what he told me. As long as the two speed controls work as one, it should prevent breaking the drive shaft between the two I would think.
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