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Service & Maintenance Question

    G W
    What is "Husqvarna special grease", for...escalated
    Service & Maintenance Question posted May 15, 2014 by G W 
    5073 Views, 2 Comments
    Question:
    What is "Husqvarna special grease", for string-trimmer angle gears?
    Details:

    I have a Husqvarna 225L trimmer from about 1999, still in good condition, well kept and relatively low hours for its age.

    The manual(and the manuals of several other models from that time period) says to use "Husqvarna special grease" in the angle gear, but no part number is given and I can find no record of there ever having been such a product.

    What type of grease is it, or what is it compatible with? (lithium soap, lithium complex, polyurea, aluminum complex, calcium complex, weird transparent neon-green Shimano jelly, beef tallow? EP rated? Stiffness NLGI 00, 1, 2, 3? Is the lube base low or high viscosity, mineral oil, PAO(common full synthetic) or polyglycol?)

    And just to nip a potential bad answer in the bud: Just because it is filled at the factory does not mean that it never needs to be topped up, or that it doesn't break down. I also do all my own maintenance as my day job is industrial engineering(hands on type).

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    Answer

     

    • Eugene Rounds

      The part number is 503 98 96-01 but any good high temperature grease should work as well. As far what type of grease it is I have no idea currently. Please beware that this product may not be available and alternate may be sub.

      There is a plug for filling lubricant on the gear housing. New machines are first filled with grease after approximately 20 hours of operation, and subsequently approximately every 60 hours of operation.
       
      CAUTION! The gear housing must not be filled completely with grease. The grease expands as the machine heats up
      during operation. If the gear housing was completely filled with grease it could damage the seals and lead to leakage of
      grease.
       
      The grease in the bevel gear does not normally need to be changed except if repairs are carried out.

       

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      • G W

        Thank you for the part number, but it seams to be discontinued.

        So without being able to find the type of thickener I'm left with little choice but to service it and solvent clean all the old grease and replace it with a known and available gearbox grease.(like one of the several types I keep on hand).

        Several common grease thickeners will react and cause either excessive thinning or less often hardening, either way poor lubrication.
        This isn't geneally an issue with low speed items like steering pivot bearings(and some generally gets pushed or flushed out at every application), but in a churning high speed gear box excessive wear may result.

        I may call husq in a last attempt to get this info before doing the grease replacement.

        My car's manual says that the transmission fluid never needs changing but I could tell it was breaking down and after replacing it it had noticably better shifting. Sometimes equipment makers don't want products to last for decades and give service advice with that in mind, many other times management was just penny pinching and hired someone cheap to write the service manual.

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