Hydro Storage

Discussion in 'Mechanic and Repair' started by Mack77, Jun 13, 2006.

  1. Mack77

    Mack77 LawnSite Member
    from NJ
    Posts: 208

    Hey guys...

    I've pulled a set of hydro wheel motors from a Walker and i'm looking to store them indefinatally until they are needed. I cleaned up the outside of the hydro units and would like to know if there's a specific way to store these. I was thinking i'd just wrap them in bags, and set them away in a box in a safe place.

    Is it necessary to drain the old oil out of the hydros and replace with new oil before storing the units, or will they be fine just the way they are for a few years in the box.

    Thanks!
     
  2. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    IMO, I would drain the old oil and refill with new oil completely, Then cap them off. This would prevent any moister from entering and cause surface rust on internal parts. Upon reuse drain the storage oil and install.
     
  3. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,142

    Any chance of getting air in there since he has them off the unit and can't run them?
     
  4. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    I would think if the motors are sat with a hose connector facing up and oil poured in the air would purge it's self as it does when a oil filter it sat straight up and pre-filled.
     
  5. muddstopper

    muddstopper LawnSite Silver Member
    Posts: 2,342

    Definatley fill with new oil and than cap off. A hydraulic motor or pump that sets empty, even caped off will rust internally and seize. We have stored used and new hydraulic motors and pumps for years at a time before using them, and always filled with oil and capped. I also might suggest that if the hydrualics are used and moisture might already be present, that you flush the pump/motor with a degreaser before just adding new oil. it isnt that hard to flush, simply spray inside the fitting ports while spinning the shaft by hand. Drain the cleaner and then apply new oil.
     
  6. Mack77

    Mack77 LawnSite Member
    from NJ
    Posts: 208

    Thanks for the info! I will definatally drain the old oil and replace with new. Degreasing the motor also seems like a good idea as well...any suggestions on a degreaser?
     
  7. muddstopper

    muddstopper LawnSite Silver Member
    Posts: 2,342

    kerosene or diesel fuel should do the trick. the inside of the motors shouldnt be gummed up and all you are trying to do is just flush out any excess moisture. Just pour the fluid into either port and turn the shaft by hand as you pour the fluid in. The fluid should come out the other port as you turn the shaft. Drain and then fill with new oil and cap off both ports, (some hydraulic motors can have three ports, a In and Out as well as a case drain that returns to the tank.)
     

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