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3 point lift?

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Mark in Ilinois

04-20-2003 06:24:11

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I have a 8n that I was discing with the other day when the three point lift started acting up. It will lift the disc up all the way but it wont let it back down to the ground. Any ideas?
Thanks Mark

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ZANE

04-20-2003 10:04:08

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Re: 3 point lift? in reply to Mark in Ilinois, 04-20-2003 06:24:11

The N has no filter system and junk builds up in the bottom of the lift reservoir around the intake for the hydraulic pump. Some times the pump will pick up some of this junk and try to use it for hydraulic fluid. It ain't good for hydraulic fluid and if it gets between the valve spools and the plungers it will cause them to stick.

Best remedy is to remove the PTO, drop the pump and thuroughly clean the pump and maybe even remove the control valve plungers and clean and polish them.

The alternative is you can try opening all three drains and take off the right side inspection plate from the lift/differential houshing and pour five gallons of diesel or kerosene through the pump to chase out the crud and junk that has been hiding there for years.

You can let the cleaning agent sit in the catch basin for a while and then pour it through again being careful not to let the dreggs go back into the lift reservoir.

While you are in there you can move the control valve back and forth to see if it seems to be binding. Ususlly after new clean oil is put back the sticking problem will go away.

Zane

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