Question about John Deere 420,1020,2010,2020,2510,2520 Tractor Float

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The hydraulic steel line on my 2010C bucket loader broke and I dumped a good amount of fluid before shutting everything off. Replaced line and filled tank up, everything worked fine for about 1/2 hour, then tried to pull back a stump,when instead of pulling, the whole boom lost its' lift. Now the boom won't stay lifted, drops right down. Bucket works normally. No visible leaks.Oil level ok, used Hygard from JD.

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  • Anonymous Mar 25, 2014

    loader drops before it starts to lift

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Like other hydraulic systems, there is probably a procedure for bleeding the lines after loss of most of the fluid. You may still have air trapped in the system and once it works its way to the cylinder, the cylinder is working with air instead of fluid and the air compresses instead of doing work.

Posted on Sep 16, 2010

  • Dennis Key
    Dennis Key Aug 29, 2014

    The line you replaced the size ?

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Posted on Jan 02, 2017

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I need to bleed the hydraulic clutch system


Your hydraulic clutch system is a wonderful smoothly operating method of engaging and disengaging the engine from the transmission. Most of the time. However, should you ever find the need to expel air from this hydraulic line...you may in for a long tedious experience.

I recently had to replace the master cylinder of my hydraulic clutch system. This was easily done as it comprised only one fluid line..and two bolts. Once the new master cylinder was mounted however, I found that air had gotten into the line..and adamantly refused to leave.

I undertook all of the common methods of removing this air but to no avail. I tried bleeding the system from the slave cylinder. I tried opening and closing the bleeder valve at the slave cylinder while someone pumped the clutch pedal for me. I tried using a vacuum pump to pull fluid and air out of the system. Each and every effort failed.

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I did a great deal of searching online trying to find a method of removing this air from my hydraulic clutch system and discovered some of what was causing the problem. The Bore of the piston inside the master cylinder is small...and the stroke or forward movement of that piston..is rather short. There just wasn't enough movement of fluid going on to force the air out of the system in a reasonable amount of time. But my search did bare fruit finally..I found a wonderful article on refilling a hydraulic clutch system..that eliminates air, takes only a very few minutes and is not at all expensive.

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