2140 hydraulic problems


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2140 hydraulic problems

jamie smith 1980 2140 (same as 2750) has sticking scv's (spool type) . Thought problem came from control valve on attached silage feeder but on checking found no problems other than machine control valve full of steel fragments , each about 1/8th square and about 1/64th thick . These are NOT from machine . Been told it may be brakes breaking up but there are no other problems with tractor and low pressure circuit seems ok . Could these fragments have come from main hydraulic pump?
Mike Pull the hyd filter and drain the oil, then pull out the suction screen. Check for more material on the screen. Try to identify if it's brakes(fiber type brown pieces) or just steel. If steel made it to the control valve, either of the two pumps are going, the suction screen is damaged, or it came from something you hooked up to. Does it have Hi-Lo?
jamie smith Thanks for the help , got mechanic out and we pulled filter and strainer and we found brake fiber pieces and steel fragments . He reckons steel fragments have come from outlet valve guides (that hold outlet valve balls in main pump) , also when tested pump showed only about 2000 psi . It will be these steel fragments that have jammed the scv's . With any luck the brown fiber pieces will have come from the brake discs starting to break up , rather than from damage to the pto clutch (or pto brake) or hi-lo . I think that the brake discs will be easier and cheaper to change , will let you know , thanks
jamie smith After a long delay we finally got the tractor into workshop. Dealer checked brakes and they were like brand new , and were put back in. Main hydraulic pump was dismantled and found to have damage to the outlet valves, these have broken up and that was the source of steel fragments. The brown fiber pieces have come from the hilo which only required new clutch plates. Spool valves are beyond repair and are being replaced by a set from a breaker.


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