Posted by Robert Hasserd on December 08, 2007 at 05:24:57 from (98.197.156.61):
I am working on a 674 and I got the tractor with no hydraulics operating except power steering. Changed out the filter ( not to dirty )drained all oil and replentished it, still no operation of the front end loader. Removed the valve plate on the side and replaced hydraulic pump ( worn bad ). pulled out all valves in plate and resealed them, reinstalled all parts and still no hydraulics except the 3 point hitch will go up with no control and the pto shaft will not rotate. After the engine is off the PTO will turn but only 90 deg. in either direction.I removed the dump valve under the seat and changed out all seals and verified the valve works freely, and just in front of the dump valve is a plug with a pressure reg. type spring assembly and upon removal the plug shot out under pressure with the engine off.I feel there is a valve stuck or hung open because there is no flow to the front end loader valve body at all, and the line feeding the dump valve is getting hot. Can you help me with some tips or show me where to get a power flow chart/diagram of the hyd. system please. Thanks in advance, Robert-----
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Today's Featured Article - Show Coverage: Godfrey, Illinois Country Days - by Cindy Ladage. Except for last fourth of July's Old Gold show in Springfield, Illinois, I don't remember when it was so hot. Nevertheless, the heat didn't keep vendors and visitors alike from enjoying the third annual Country Day's Event. Jane Elliott said the event was originally a one man show. "Barry Seiler, owner of Country Town Farm Supply store used to invite people up to the Johne Deere store. He would give hats and a free meal for everyone that brings a tractor." Elliott said while this
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