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Hydro Cooler

Discussion in 'Mechanic and Repair' started by riches139, Dec 20, 2004.

  1. riches139

    riches139 LawnSite Senior Member
    Posts: 369

    Anybody ever add a hydro cooler to their Z?
    I see Scag has them on some of their units.
    Mine didn't come with one, and I think it's a good idea. :cry:

    Any parts sources or ideas as to a setup would be greatly appreciated.

    UNISCAPER LawnSite Bronze Member
    Posts: 1,426

    Any time you can keep cooler oil it is a good idea. I had external coolers on all mu engines and hydros that did not have factory equipment and man did they ever make a difference in longevity.
  3. jim dailey

    jim dailey LawnSite Senior Member
    Posts: 614

    Best that we not forget...coolers go on the return side (low pressure side) of the hydro system!
  4. CCWKen

    CCWKen LawnSite Member
    Posts: 113

    I'm looking for a 8" fan to cool an Eaton myself. Does your hydro have a charge pump or in/out lines?

    If you plan on using the radiator style, make sure it can handle the RETURN pressure. Most of the automotive automatic transmission and power steering coolers should handle the load. The PS coolers are very compact if you're pressed for space.
  5. riches139

    riches139 LawnSite Senior Member
    Posts: 369

  6. jimslawns

    jimslawns LawnSite Senior Member
    Posts: 283

    To find lines for your hydro, check at NAPA auto or a tractor repair/dealer they can usually manufacture what ever you need.
  7. CCWKen

    CCWKen LawnSite Member
    Posts: 113

  8. riches139

    riches139 LawnSite Senior Member
    Posts: 369

    Thanks CCWKen.
    Ordered a catalog from them.
  9. ducky1

    ducky1 LawnSite Senior Member
    Posts: 252

    I mounted a automotive transmission cooler flat about 8 inches above the flywheel shroud and it get enough air from the flywheel pulling the air down to cool the hydro oil around 80 degrees cooler. Had to make a frame for it to mount to and bolt onto the frame of the mower on each side of the engine. Regular fuel line connected with hose barb fittings with hose clamps work well on the low pressure side of the system. Fuel line will take quite a bit of pressure. Has worked for 3 years now with no problems of leaking.
  10. wriken

    wriken LawnSite Silver Member
    Posts: 2,154

    The early MTD, think they were called pro Z's, had a cooler on them, mounted under the seat area, in front of where your hyd tank sets. Anyways the newer cubs/lesco's have increased the oil capcity and have the finned fans over the hydro motors/pumps. I have thought about mounting a cooler over the shroud area on the motor also, but never have the time to do it. I put a thing I got from JCWhitney, that clamps onto the hyd oil filter to extract the heat, it has fins and made out of aluminum.

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