Do not mix greases of different type

Discussion in 'Mechanic and Repair' started by PM Baker, Jan 20, 2005.

  1. PM Baker

    PM Baker LawnSite Member
    Posts: 55

    What's with the WARNING on greases that says: "Do not mix greases of different type. Use a solvent to remove and clean out ALL TRACES of incompatible greases before repacking."
    How do you clean out all traces without disassembling! Who's got the time to "clean out ALL TRACES"? Is one stuck using the same grease forever? What if you bought your equipment used, how do you know what was done before? Any thoughts from the experienced?
     
  2. Grassmechanic

    Grassmechanic LawnSite Silver Member
    Posts: 2,697

    What I do is take the bearings and soak them overnight in degreaser or kerosene. This will soften and dissolve the old grease. Then I use compressed air to blow the grease out. This may have to be repeated to remove all traces of grease. Dry the bearing thoroughly, then re-pack with grease of your choice.
     
  3. CCWKen

    CCWKen LawnSite Member
    Posts: 113

    Some greases are heavy petrolium based some are heavy soap based. Mixing them can make goo! There's also different additives for various applications. These additives enhance the characteristics of the grease. What is meant by the warning is don't use chassis lube in wheel bearings or HD EP lubes for bushings. The EP additives can attack bronze bushings.

    The best thing to do on a used machine is to clean all the grease out and start fresh. Get the right grease(s) for the application and stick with it. Even it means having two or three "labeled" grease guns!
     
  4. YardPro

    YardPro LawnSite Gold Member
    Posts: 3,563

    they are refering to mixing sulphur based greases and lithium based greases.

    they will liquify if mixed.

    sulphur based are most EP greases. moly grease is molybdeniumdiSULFIDE. sulfur based.

    lithium greases usually have lithium in thier name.
     

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