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John Deere Tractors Discussion Forum
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Deere 2150 lift arm hydraulics

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walterep

09-04-2015 08:51:26




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I recently purchased a Deere 2150 tractor. It has very low hours (600), but had been sitting unused in a shed for a number of years. The only significant problem is that the lift arms drop immediately when I turn the engine off. Here are some observations I've made;
1) The rate-of-drop adjustment works fine when the engine is running. I can lock the arms in an upright position with the rate-of-drop knob and then the lift arm lever has no effect. So things are normal with the engine running. If I shut off the engine the arms will drop, though they drop more slowly if the rate-of-drop is tightened down. So the fluid is finding an alternate path.
2) If the arms are down (with engine running), moving the load compensation lever from minimum to maximum and back causes the lift arms to lift and drop a few inches. According to the manual, this should not happen. (This is one of the tests JD recommends to see if things are operating normally.)

Seems like maybe a relief valve may be stuck somewhere, which would seem consistent with the tractor having sat unused for a long time. My guess is that this repair will require a trip to the JD dealer, but I'm wondering if anyone has any ideas. My fear is that the repair guys won't be old enough to remember much about the 50's series hydraulics.

Thanks in advance.

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ET

09-04-2015 12:17:54




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 Re: Deere 2150 lift arm hydraulics in reply to walterep, 09-04-2015 08:51:26  
On the 40 series 3pt's there were some blocker plugs on the rockshaft cylinder that have an O-ring on the outside of them that would blow and do what you describe. The plugs are held in with a snap ring and are tapped 3/8" nc so you can screw a bolt in to pull them out. Easy fix but you need to pull the rockshaft.



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Tx Jim

09-04-2015 12:40:44




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 Re: Deere 2150 lift arm hydraulics in reply to ET, 09-04-2015 12:17:54  
The plugs that ET referred to are parts keys 17 & 34 but seals (parts keys 15,16 or 32,33 depending on tractor serial number) also need to be replaced along with RS piston seals if rockshaft is removed from tractor

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This post was edited by Tx Jim at 12:44:30 09/04/15.

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Tx Jim

09-04-2015 09:23:06




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 Re: Deere 2150 lift arm hydraulics in reply to walterep, 09-04-2015 08:51:26  
With engine running,3 pt raised look in hyd filler hole for spraying oil. Probably you have leak in 3 pt piston seals &/or leaking control valve seals.
This post was edited by Tx Jim at 10:00:23 09/04/15.



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walterep

09-08-2015 09:13:07




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 Re: Deere 2150 lift arm hydraulics in reply to Tx Jim, 09-04-2015 09:23:06  
I looked in the filler hole and there is no oil spray or visible leakage at the rock shaft cylinder. I may have to take it to a JD dealer and hope they have someone who knows the 50 series well enough to find whatever is sticking or leaking without doing too much unnecessary parts replacement or repair. I hate to resort to trial and error.



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Tx Jim

09-08-2015 09:45:25




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 Re: Deere 2150 lift arm hydraulics in reply to walterep, 09-08-2015 09:13:07  
Where is the L/D lever under seat setting in max or min?? I suggest to set in minimum and check 3 pt settling rate.



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walterep

09-04-2015 09:48:07




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 Re: Deere 2150 lift arm hydraulics in reply to Tx Jim, 09-04-2015 09:23:06  
Will do. Thanks Jim.



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