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Minneapolis Moline Tractors Discussion Forum
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Hydraulics Question

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JKC

12-06-2003 12:20:33




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I recently drained my hydraulic oil from my 1967 Jetstar 3 Super Gas, replaced the filter, and filled with new oil. I followed the instructions in the Operators Manual to the letter. My tractor is equipped with a hydraulic loader. After using the loader for several minutes successfully, the pressure burst either a hose or a connection (haven't been able to locate it yet), which shot oil in every direction. Since I know very little about hydraulics, I can only assume that there was too much air pressure within the system when I refilled it with fresh oil, but I'm just guessing.

Can someone tell me what I did wrong? What is meant by "bleeding" the system, and how do you do that?

I am in need of replacing a hose on another tractor, which means I will probably have to drain the system, and I do NOT want a repeat of what happened with the Jetstar. Any help would be greatly appreciated.

Thanks very much.

JKC

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Kevin Moschenrose

12-06-2003 15:43:58




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 Re: Hydraulics Question in reply to JKC, 12-06-2003 12:20:33  
Some systems have bleeder screws on the rams especially on the one way type. One other way is to loosen a fitting on the loader rams just where it tees off to go to each side. Start the tractor and raise the loader easy until nothing but good fluid comes out no foaming fluid means no air. "There maybe a little foam but that won't hurt none!" Before you lower it down tighten the fitting back so it won't suck air into it. Bleed it just like you would brakes on a car.
But you may have a pressure relief valve stuck closed too.

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