Re: 3 point hitch drops

Posted by John on June 22, 2002 at 05:55:51 from (64.12.105.39):

In Reply to: 3 point hitch drops posted by wayne worthley on June 21, 2002 at 17:29:18:

A lot of Deere owners of used 20,30,40 series do make mention of jerky hydraulics. I experienced this on some of mine.(1020,2440,2840,2550) In most cases the cause of the jerkiness was air bubbles in the hydraulic oil. When buying one of these Deeres used I have found that checking the dipstik for air bubbles while the tractor is hot is a fairly good way to assess the tractors health. In most of these cases the loader or 3 pt works fine for a few minutes. Then as the oil saturates with the bubbles will you see the jerky operation appear. In one case the loader return hydraulics dumped the oil into the rear of the differential where it splashed down to reservior level. Re routing the oil line to a ported filter housing cured the problem. In my 2840 the cause was a worn pto brake (with continous live independent pto)which causes a pressured spray just above the resevior level loading up the oil with air bubbles. That fix requires a tractor split.
Now when looking at used Deeres I take a flashlite and look into the Hydraulic oil filler hole for spraying oil and also a magnifying glass to look for the tiny bubbles on the dipstick. Mostly observed when the machines been operated for a bit so its hyd oil has been warmed up a bit.

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