Go BottomNew JD3120
 | S120483
Join Date: Mar 2005 Posts: 3 Michigan 
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2005-07-16 113539
Hey guys just got my new JD 3120 this morning and have been out playing a bit with it. I got the ehydro and was curious what RPM shoudl i run it at for best fuel efficiency and performance when doing loader work? I was running it at 2600 rpm, is this good? Thanks for the help, prolly with have more ? forth coming.
Jay
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| willhughes
Join Date: Jul 2005 Posts: 10 Harlingen Texas
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2005-08-09 114606
Howdy Jay,
I'm looking to pick up my 3120 in about two weeks maybe. How do you like yours so far?
Will ....
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 | Chief
Join Date: Jul 2003 Posts: 4297 Southwest MiddleTennessee 
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2005-08-09 114608
Unless I am using the pto or just need a quick boost in power or speed; I run my 4410 between 1,800 to 2,000 rpm which is near its torque peak. ....
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 | Iowafun
Join Date: Jul 2004 Posts: 955 Central Iowa 
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2005-08-10 114649
If using the loader, you may want to keep the RPM's up around 2600. The loader is run off the hydraulics which is run from a hydraulic pump. The hydraulic pump gives max pressure at a certain RPM and is run off the tractor's engine. So by running the engine at a lower RPM (say to get max torque out of the engine) your hydraulic pump is not running at it's optimal speed. As a result, your loader may not work as well as it should/could.
Same applies to the hydrostat. If you are dinking around, you can run at lower RPM. But if you are doing any work, say with loader or an implement, you should run the RPMs up higher to keep the hydraulic pumps running at optimal speed. If you don't, you are pushing your pumps harder than they should be because you are asking them to do hard work but are not giving them the input (engine speed) they need to meet the requirement. It could shorten their life. ....
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