Question about John Deere Synchronizer 340d 440 440a 440b 448dr31028

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Lost all hyd. function on my 440b log skidder. new pump 2yrs. ago. splines on pump are good. what do i look for next?

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My 2007 648h John Deere skidder makes a loud noise over 2000rpm as though its low on hydraulic oil which it isnt all functions work fine , any ideas

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Taylor fork lift

If your old pump was knackered then I would change your return and suction filters, the insides of the old pump will be choking them. Also check your suction hose (make sure its tight). When the pump was fitted did the engineer readjust the relief valve on the control valve? Is your hyd oil level ok if not top it up it could be drawing air. Your hyd system could also be air locked aswell so it may be a good idea to bleed the system.

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1 Answer

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1 Answer

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