Why Is My Hydraulic Pump Flood Always Black

Discussion in 'Mechanic and Repair' started by Tennesseepowerstroke, Apr 28, 2013.

  1. piston slapper

    piston slapper LawnSite Platinum Member
    Messages: 4,337

    Hang in there...
    Exmark produces some of the best mowers in the industry and has some of the brightest engineers on their payroll..
    Customer service departments are usually a pipeline to direct people to one of their authorized dealers..
    Every large corporation has smiley people answering their phones offering hopeful advice.
    Unfortunately...the ones that can give you solid advice....work in another department...
    BTW...if they doled out tech advice on an open forum....their dealer lines would overload with complaints...
  2. Exmark PR

    Exmark PR Sponsor
    Messages: 238

    Send your contact information, model number, and serial number, to exmarkpr@exmark.com and we will have someone follow up with you today.
  3. Breezmeister

    Breezmeister LawnSite Bronze Member
    Male, from South Jersey
    Messages: 1,791

    I would agree with that....

    I see you have never had to replace a damper on a 2011 Lazer

    See tagline :dizzy:
  4. Tennesseepowerstroke

    Tennesseepowerstroke LawnSite Senior Member
    Messages: 366

    Well after 4 days and no returned calls, I finally got a rep today. "Joe" said the reason the Mobil 1 was turning black was because Mobil changed the formula. I was advised to switch to the Exmark hydraulic fluid, which I was previously advised not to use in my 2008 pumps, and I could double the service interval to 400 hours. I was advised that it is okay to mix the fluids. Does anyone else have experience mixing these fluids? I am in the market for a new mower but have my doubts about another Exmark after this experience. Does anyone have a positive experience with another manufactures tech support services? I am currently looking at Gravely, Bobcat and Scag eqipment.
  5. Greg78

    Greg78 LawnSite Silver Member
    Messages: 2,010

    Not buying it. Too many guys including myself running Mobil 1 15w-50 with our fluid not turning black.
  6. piston slapper

    piston slapper LawnSite Platinum Member
    Messages: 4,337

    Hmmmm...I smell a fish....
    We run Mobil 1 15/50 in all our mowers...it aint turnin black..
    Mobil didnt change their formula for making 15W50...
    Im wondering if Exmark altered something in their hydro system hose materials or filters that reacts adversely to regular Mobil 1.???
    It sure would make it easier to sell their own brand of hydro fluid...wouldnt it...??
    Reminds me of the old Ajax commercial...shakes out white...turns blue...
  7. Greg78

    Greg78 LawnSite Silver Member
    Messages: 2,010

    Wouldn't doubt it at all. I used the Exmark fluid for my hydro fluid change last year. One month later lost a pump, coincidence? I think so. Regardless I switched back to Mobil 1 just for the fact I get it for about $5 a quart when buying the 5 quart jug and being able to get it anytime vs $8 plus a quart and having to go to the dealer.

    Wondering since Exmark has their own hydro fluid does Toro as well?
  8. Greg78

    Greg78 LawnSite Silver Member
    Messages: 2,010

    Did a little research. So Toro does have their own hydro fluid now called HYPR-OIL 500, no doubt the same stuff as the Exmark Premium Hydro Fluid. In Toro's manuals they are saying to use the HYPR-OIL or 20w-50 engine oil.
  9. Bo Jack

    Bo Jack LawnSite Member
    from midwest
    Messages: 28

    Maybe give the pump manufacture a call and talk with there tech people.
  10. djagusch

    djagusch LawnSite Platinum Member
    from MN
    Messages: 4,357

    Anybody just talk to their dealer? Seems like they would see mfg's issues locally. Usually they have a tech line number different then consumers also.
    Posted via Mobile Device

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