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Question on K-Plane installation

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Old 05-17-2002, 09:43 AM
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Default Question on K-Plane installation

Ok, getting close to putting motors back in the boat. But before I can do that, I need to mount my new Tabs. Quaestion I have is this: I presently have a Bennett system and with dual rams with a single hydraulic feed to each of them. I am installing K Planes with a single ram with dual hydraulic feeds. Can I use my Bennett pump and if so, what will I need to do to accomodate a dual hydraulic feed to each ram? If anyone has some info or knows of someone that can assist, please let me know.
Thanks, Bruce
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Old 05-17-2002, 10:51 AM
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Bruce whats up dude, So you are gonna try to run K-planes off a Bennett pump,hmmmmmmmmm thats a good question, I think you'll need a pump for each tab, I don't think one pump will do it, call Bennett they should know, good luck and get that thing in the water.

http://www.bennetttrimtabs.com/help.htm
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Old 05-17-2002, 11:13 AM
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In fact thats what I did and found out I will need to purchase 2 merc pumps. Do you know of anyone selling any?
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Old 05-17-2002, 11:16 AM
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The K-planes are quite a bit longer and probably will have a lot more area.

The extension in length alone will increase the moments about the hinge point significantly. This will translate into greatly increased hydraulic impulse pressures generated by the rams. I highly doubt the Bennet hydraulic pump hardware will take the abuse for long.

I could be wrong, but intuitively, I don't think the bennet pump was overdesigned sufficiently to accept such a large change in work load.
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Old 05-17-2002, 11:23 AM
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Plus, the bennet pump is single acting (spring return cylinders)and the k-planes are dual. You will need the Merc pumps.
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Old 05-17-2002, 11:23 AM
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Just found that out. Was hoping to be on the water for next weekend, but not looking good. I am now looking for a good price on Mer pumps. Slight oversight on my part. Don't know what I was thinking. I guess I should have realized with all the re-rigging I have been doing there was more to do.
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Old 05-17-2002, 11:42 AM
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If I'm not mistaking, you can use a bob's pump he's pretty reasonable. I think there around 200.00 to 225.00 a piece for the pump assem.

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Old 05-17-2002, 11:48 AM
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ok...what is a bobs pump?
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Old 05-17-2002, 11:51 AM
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Mike,
Would you happen to have Craig's number down in St. Cloud?
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Old 05-17-2002, 12:04 PM
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Bruce , bob's machine shop sells a pump identical to Mercurys pump its the same pump I have on my outboards trim and tilt call them and get a price, here is there site:http://www.bobsmachine.com/index.htm
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