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Case Tractors Discussion Forum

870 hyd.leaks

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04-02-2013 18:32:50

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A few days ago I posted having a problem with a internal oil leak in the 870 PShift circuit. I corrected the problem by cleaning the P Sh. control valve and replacing the old style inching spool modulator. I thought the old modulator was at fault, so today just to be sure I reinstall the old one and my hyds. still operate properly. So the modulator was not causing the internal leakage. I do not know what the cause was, I disassembled the entire control valve, cleaned and inspected it completely and found nothing out of the norm. Reassembled and installed it only to find everything operating correctly again. The cleaning fixed my leakage problem, I only wish I knew why. If others are having slow hyd. issues and the P sh. Itself checks out good a cleaning of the control valve sure won't hurt anything and the only parts you'll probably need is a couple gaskets. Rod.

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04-02-2013 19:00:33

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 Re: 870 hyd.leaks in reply to 1370rod, 04-02-2013 18:32:50  
I know not the same but bought a 630 cheap, cheap years ago because the com wouldn't lock in direct drive. Took the clutch spool off and found a small metal filing holding the spool open. Removed it and cured its problem. Using the tractor still. Sometimes you get lucky!

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