air in the hydro system

Discussion in 'Mechanic and Repair' started by Shady Brook, Feb 14, 2002.

  1. sdwally

    sdwally LawnSite Senior Member
    Messages: 386

    Hydro are a closed loop system. They will purge themselves without doing anything else. The hydro pump has a large cavavity which the charge pump will fill full of oil, they actual pump then draws oil from this cavavity. As mentioned above, it is best to pre-fill the new filter.
    Oil filter leak - make sure that the gasket is on the filter correctly and that the old gasket is not stuck to the filter head. Lubricate the new gasket with a little oil before installation. If you still have leaks check the filter head gasket area for any scratches or gouges, also make sure filter head gasket area is clean. If you still have leaks try lubricating the gasket with grease(just a little) instead of oil. If you still have leaks the filter head may be warped.
  2. awm

    awm LawnSite Gold Member
    Messages: 3,354

    i guess if u really got down on it with a filter wrench ,u could squease the seal out of wouldleak then. i just put mine on tight as my grip will do it.never leaks or has a problem.
    later now
  3. Shady Brook

    Shady Brook LawnSite Bronze Member
    from Indiana
    Messages: 1,517


    Thanks for the reply. It took me about 7 times to get it right this time. I usually tighten it down real good by hand, but it always seems to leak. So then I back it off, goof around, back off, tighten up til I get it right. I wish for me that it was just hand tight and be done. Would make it a whole lot easier.


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