Hydraulic lift

davyfireball · May 18, 2020

The hydraulic drift down after about 15 min. I just put in a new rubber ring on the piston. I didn t change the leather wiper. I used Zane s thing to adjust the linkage. And it works very well. The pressure relief valve is only 7 months old and used about 8 times. There are no drips from the top. The only thing I can think of is the relief valve? It has 80/90 w oil

JMOR · May 18, 2020

(quoted from post at 11:41:37 05/18/20) The hydraulic drift down after about 15 min. I just put in a new rubber ring on the piston. I didn t change the leather wiper. I used Zane s thing to adjust the linkage. And it works very well. The pressure relief valve is only 7 months old and used about 8 times. There are no drips from the top. The only thing I can think of is the relief valve? It has 80/90 w oil

see no problem here.

TheOldHokie · May 18, 2020

(quoted from post at 11:41:37 05/18/20) The hydraulic drift down after about 15 min. I just put in a new rubber ring on the piston. I didn t change the leather wiper. I used Zane s thing to adjust the linkage. And it works very well. The pressure relief valve is only 7 months old and used about 8 times. There are no drips from the top. The only thing I can think of is the relief valve? It has 80/90 w oil

It also has a leak. If you suspect the relief valve remove the inspection cover and slip a 2' length of tight fitting clear plastic tube over the end of the valve. Raise the lift and let it drift down a couple times. If oil collects in the tube the valve is leaking. If not the leak is elsewhere. I believe that tip is courtesy of Hobo.

TOH

davyfireball · May 18, 2020

I guess I m just very picky when it comes to machinery. Thank you for your reply. That old 48 has kept me & neighbors moving for the last 18 years. They have heart trouble so it s kinda my responsibility to help them. Don t get money just a thank you.

R Geiger · May 18, 2020

One should really never leave the lift arms in the up position anyway. Especially if you have kids around that like to play around the tractor. I have two 8n's and I could not tell you if they stay up or not when I shut them down. They are lowered before I shut the machine off.

davyfireball · May 18, 2020

You re right when I did that it was in garage. And I was with the tractor. I also put wood 6x6 blocks under blade. Davy

JohnnyHville · May 18, 2020

Did you hone the cylinder?

Several years back I replaced the rings with the metal ones because of drift down, thinking I was stepping up in the world. When doing this, it didn't appear the rubber rings I was replacing were nicked or
cut or overly worn. It helped some, but still would drift down. Last summer I re-did it using the rubber ones after reading about the problems with the metal rings. But, this time took time to hone the
cylinder. While I'm sure the rubber rings helped, I believe it is because of the honing that majorly improved things.

While I also do not leave my lift up when stopping, I noticed one a couple weeks ago that of the boys had plowed mama's garden with a single bottom and left it lifted from the drive back to the barn. I
noticed it still up in the air the next morning. Was seriously impressed.

I also always use limiter chains to avoid over-using/abusing the hydraulic system with heavy implements that I keep in one position (mowers, sprayer, etc.). Maybe that helps to preserve things.

Hydraulic lift

davyfireball

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JMOR

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TheOldHokie

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davyfireball

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R Geiger

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davyfireball

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JohnnyHville

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