d17 hyd problem

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   why does my series iv keep busting hoses and lines in hyd system.when i use remote hyd,pump seems to pump against its self,then blow a hose or steel line.

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otis Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 25 Mar 2010 Points: 63	Post Options Post Reply Quote otis Report Post Thanks(0) Quote Reply Topic: d17 hyd problem Posted: 16 Apr 2011 at 9:34am
	why does my series iv keep busting hoses and lines in hyd system.when i use remote hyd,pump seems to pump against its self,then blow a hose or steel line.

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Steve M C/IL Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 01 Jul 2010 Location: shelbyville IL Points: 691	Post Options Post Reply Quote Steve M C/IL Report Post Thanks(0) Quote Reply Posted: 16 Apr 2011 at 10:09am
	My 220 has a pressure relief for setting hyd pressure.I assume your ser 4 is similar since it has the external gear pump.If set too high....you can split the pump housing.The relief is up at the valve stack on my 220.Better get a guage and see what's going on before your looking for a pump. Edited by Steve M C/IL - 16 Apr 2011 at 10:10am

tbran Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 14 Sep 2009 Location: Paris Tn Points: 3439	Post Options Post Reply Quote tbran Report Post Thanks(0) Quote Reply Posted: 16 Apr 2011 at 10:42am
	sounds like the relief valve stuck, switch the draft control relief valve with the main relief (thats the two identical valves that have the round acorn nut on the end - one faces front and the other faces the rear - unscrew the entire valve and swap - valves located on each end of the valve stack behind your right elbow under the flat sheet metal - accesable without removing any sheet metal.) Then test to see if you still have the pump loading. If not take the offending valve apart on a clean area and surface and replace the oring and find the stuck parts - this is a double stage relief valve designed to dump large volumes without damaging systems. The traction booster or draft relief is the one on top of the spool that has no yoke or pin in it. Actuated by the finger of the draft linkage.