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Tool Talk Discussion Forum

Hydraulic Isolator (electric)

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Uncle

10-11-2006 15:48:37




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I have this idea in my head I need advise on.
I am putting a PTO on a Mack truck to run a winch. The clutch on the truck is hydraulic. I have a small master cylinder and I want to plumb it into the clutch slave cylinder.
I need some way to isolate the hydraulics so I can use the truck clutch for normal driving, and when needed, switch over to the hand clutch for the winch.
Am I on the right track and where can I get this isolator?
Brian

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JD9295

10-13-2006 01:17:18




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 Re: Hydraulic Isolator (electric) in reply to Uncle, 10-11-2006 15:48:37  
safest and cheapest way is run the cable to the clutch from your hand lever. thats been done a million times on oil field trucks here and it works, simple and easy



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Bob

10-11-2006 18:37:54




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 Re: Hydraulic Isolator (electric) in reply to Uncle, 10-11-2006 15:48:37  
I don't know if this would be SAFE or LEGAL, and you certainly didn't hear it from me, but HYPOTHETICALLY speaking, how about leaving the present foot clutch setup as it is, then plumbing a SECOND slave cylinder to your lever operated second master cylinder, with a totally SEPARATE hydraulic circuit.

Mechanically connect the second slave cylinder to the clutch operating lever, coming out of the bellhousing, ALONG WITH the original setup.

You will then have two separate hydraulic circuits, each able to operate the same lever.

As long as the slave cylinders are set up so the linkage from the cylinder NOT being activated can't fall apart while the clutch is being activated by the other cylinder, it SHOULD work.

Or, how about rigging a CABLE setup from the handlever to the clutch, and not bothering with a second hydraulic system???

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Bob

10-11-2006 18:37:51




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 Re: Hydraulic Isolator (electric) in reply to Uncle, 10-11-2006 15:48:37  
I don't know if this would be SAFE or LEGAL, and you certainly didn't hear it from me, but HYPOTHETICALLY speaking, how about leaving the present foot clutch setup as it is, then plumbing a SECOND slave cylinder to your lever operated second master cylinder, with a totally SEPARATE hydraulic circuit.

Mechanically connect the second slave cylinder to the clutch operating lever, coming out of the bellhousing, ALONG WITH the original setup.

You will then have two separate hydraulic circuits, each able to operate the same lever.

As long as the slave cylinders are set up so the linkage from the cylinder NOT being activated can't fall apart while the clutch is being activated by the other cylinder, it SHOULD work.

Or, how about rigging a CABLE setup from the handlever to the clutch, and not bothering with a second hydraulic system???

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Bob

10-11-2006 18:37:50




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 Re: Hydraulic Isolator (electric) in reply to Uncle, 10-11-2006 15:48:37  
I don't know if this would be SAFE or LEGAL, and you certainly didn't hear it from me, but HYPOTHETICALLY speaking, how about leaving the present foot clutch setup as it is, then plumbing a SECOND slave cylinder to your lever operated second master cylinder, with a totally SEPARATE hydraulic circuit.

Mechanically connect the second slave cylinder to the clutch operating lever, coming out of the bellhousing, ALONG WITH the original setup.

You will then have two separate hydraulic circuits, each able to operate the same lever.

As long as the slave cylinders are set up so the linkage from the cylinder NOT being activated can't fall apart while the clutch is being activated by the other cylinder, it SHOULD work.

Or, how about rigging a CABLE setup from the handlever to the clutch, and not bothering with a second hydraulic system???

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Jim K

10-11-2006 17:32:28




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 Re: Hydraulic Isolator (electric) in reply to Uncle, 10-11-2006 15:48:37  
Get yer a three way hydraulic solenoid, never mind, forget I even sugested that. I think that you would be creating a very dangerous situation.
You would have to make it a failsafe operation.
Is it even legal? what would the DOT think.
Is it going to be a farm truck or will it be driven over the road?
I would go the conventional route and set it up like a dump truck, ie; step on the clutch engage the PTO w/lever in cab, second lever controls payout and pullin or you could get a knob and cable setup (I think the Fisher plow co. makes them)they mount under the dash to save space. In fact you should be able to get the gearbox and all from them. Or a company that sells dump bodies.
Better yet go to the Warn winch co. web site.
I'm positive Warn put alot of winches on millitary trucks.
Could checkout a millitary truck junk yard or Or am I miss understanding what your trying to do
My thoughts just to make a few sugestions.
Good luck.
Jim K

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Uncle

10-12-2006 15:25:38




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 Re: Hydraulic Isolator (electric) in reply to Jim K, 10-11-2006 17:32:28  
I think you are following me.
I thought about the surge brake isolator to seperate the two systems.
It is a farm truck but it will see some road time.
Brian



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