HD6G Weak Hydraulics

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   I have an HD6G that I'm working harder than its had to work for the last 20 or more years clearing fence rows.  We've had this machine for about the last 50 years so I do have a little history with it.  The machine sat idle for about 15 years up until about 4 years ago.  But I was able to get it started after new batteries and refreshing the fuel.  Over the last 4 years I've used it for some small short term projects with no noticeable issues.  However, I started using it to push over some trees while clearing an old fence tree line.  The longer I use it the weaker the hydraulics become.  Can anyone point me in the right direction? I have not been able to locate a new hydraulic filter.  I don't have a book on the loader part of the machine so any information would definitely be helpful.  Recommended fluid? Filter part number?  Any other suggestions..... Thanks for the help

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Paul-HD6G Start-up Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 01 Aug 2021 Location: LaPorte, IN Points: 6	Post Options Post Reply Quote Paul-HD6G Start-up Report Post Thanks(0) Quote Reply Topic: HD6G Weak Hydraulics Posted: 13 hours 39 minutes ago at 7:12pm
	I have an HD6G that I'm working harder than its had to work for the last 20 or more years clearing fence rows. We've had this machine for about the last 50 years so I do have a little history with it. The machine sat idle for about 15 years up until about 4 years ago. But I was able to get it started after new batteries and refreshing the fuel. Over the last 4 years I've used it for some small short term projects with no noticeable issues. However, I started using it to push over some trees while clearing an old fence tree line. The longer I use it the weaker the hydraulics become. Can anyone point me in the right direction? I have not been able to locate a new hydraulic filter. I don't have a book on the loader part of the machine so any information would definitely be helpful. Recommended fluid? Filter part number? Any other suggestions..... Thanks for the help

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Codger Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 23 Dec 2020 Location: Utopia Points: 2501	Post Options Post Reply Quote Codger Report Post Thanks(0) Quote Reply Posted: 2 hours 26 minutes ago at 6:25am
	There are a couple of things that come to mind that are very basic in nature. First is fluid parts wear that exacerbates as the fluid/hydraulics warm. Usually you can discern this by the engine needing higher revolutions to accomplish the same repetitive tasks as the system warms. The second is pressure relieving at too low of pressure. One would normally see this hot, or cold. You would need to tap into the system and check/adjust system relief pressure as a starting point. If you cannot surmount system relief pressure by adjustment(s), most likely the main hydraulic pump needs rebuilt, or replaced.
	That's All Folks!