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Alpat 06-12-2009 06:44:25 76.224.15.15 94238 Report to Moderator	tractor hydro drive surges in high and low, fluid is full and clean, engine runs at a constant speed. [Reply]   [Send Email]
Tom Arnold 06-12-2009 16:25:36 70.26.135.73 94251 Report to Moderator	Re: case446 hydro in reply to Alpat, 06-12-2009 06:44:25   Ken's suggestions are good ones however, if you are not using 20W50 or 15W40 MOTOR OIL in the hydraulic system of this tractor, that may be part of the problem. Run the tractor until it begins "surging" and then immediately check the hydraulic tank for any sign of foaming of the oil. If you are getting foaming, then the pump is sucking air into the system due to loose hose clamps, defective intake hose or loose fittings on the suction side. This must be corrected right away or you'll destroy the pump. What is the serial number of your tractor?   [Reply]   [No Email]
Ken Combs 06-12-2009 08:47:24 76.254.212.239 94244 Report to Moderator	Re: case446 hydro in reply to Alpat, 06-12-2009 06:44:25   Surging, if the tank is full, would indicate a restricted intake . If your 446 is one of those with a screen in the bottom of the tank, check it out. They have been known to cause similar problems. Otherwise, the suction hose may be faulty and collapsing inside.   [Reply]   [Send Email]
Alpat 06-12-2009 09:39:31 76.224.15.15 94246 Report to Moderator	Re: case446 hydro in reply to Ken Combs, 06-12-2009 08:47:24   thank you ill check it out!   [Reply]   [No Email]