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Old 12-27-2008, 09:57 AM   #1 (permalink)
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PTO with Hydraulic Pump

I have an engine driven hydraulic pump that has an electromagnetic clutch that is run by belts. The belts are slipping when the pump is under load. To get rid of the slipping problem I was considering putting on a pto with a direct mounted hyd pump. Does anyone have this setup? I am looking for some advice. I was hoping to get a used unit. It would probably have to come off a '94 and up 2wd to work though.
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Old 12-28-2008, 08:50 PM   #2 (permalink)
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I am also looking for a PTO hydralic pump setup for my 91'. No luck locating one yet. I thought those belt drive pumps looked pretty cool. What are you running with it that loads it so bad it slips?
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Old 12-28-2008, 09:19 PM   #3 (permalink)
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If the belts and pulleys are correct and in good shape they should bite hard before slip. Most 1 ton's with central hydralics are run from dual belts. Lots of boats also run that system for hydraulic power. I had lots of trouble with my boat and it turned out the pulleys on the crank were aluminum and had worn to the point where the belts bottomed out instead of riding on the sides as they are supposed to. I had a machine shop turn out a steel one.
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Old 12-29-2008, 09:50 AM   #4 (permalink)
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Pump

My truck has a lot of miles so there is know doubt that the pulleys are worn. I change the one on the pump. But I have not changed the one on the fan hub. The way it is set up on an intercooled truck with the newer style rad is with a solid drive fan (no clutch). I didn't like this so I put a fan on but I cannot get to the fan nut to change it out. So I am pretty much SOL. My pump is a 5 gal/min and a 3 gal probably wouldn't load the belts as bad. A shop that services these systems says the dodge diesels stock belt and tensioner has a hard time keeping up to the demands. I would like to get a direct drive system. I would part with my pump and brackets. You would just have to get the fan pulley to make it work.

They also make a system that usese your serpentine belt that mounts where the a/c compressor goes on non a/c trucks.

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Old 12-29-2008, 04:05 PM   #5 (permalink)
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The serpentine belt drive pump that replaces the AC compressior is the one I have seen. One of the folks here at the boards showed it to me. Looked like a cool setup as you would have true live hydralics and no control cables for the PTO mechinism. Only thing is I would like to see how folks have routed steel lines of hoses to the pump. I can't see any real clean way to do it on my 91' inless I could make custom steel lines.
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