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Greasing Scag Spindles

Discussion in 'Lawn Mowing' started by SoloSulkySurfer, May 25, 2007.

  1. SoloSulkySurfer

    SoloSulkySurfer LawnSite Member
    Messages: 224

    Is it neccesary to use a lithium grease in the scag spindles (recommended in owners manual) or is regular grease acceptable?
  2. Envy Lawn Service

    Envy Lawn Service LawnSite Fanatic
    Messages: 11,087

    Cool... more grease talk... and you have the timken tapered roller bearings too.

    I want to see what Scag owners say before I say anything about it though.
    I want to see if any of them look for what I look for in a grease for timken bearings.
  3. Palmer'sLS

    Palmer'sLS LawnSite Senior Member
    Messages: 535

    I have always used the Red "premium" grease from tractor supply. Family business (fleet of dump trucks), taught me that a $2.00 tube of grease goes a long way as far as prolonging the life of equipment. Spend an extra dollar, and use the red stuff. Works great I think
  4. Palmer'sLS

    Palmer'sLS LawnSite Senior Member
    Messages: 535

    Tommorow I will be doing the "break in" service on my Turf Tiger. I am planning to grease all the fittings with the red stuff. From the factory, I notice that scag uses the white lithium(spelling?) grease, but I have never had good luck with that stuff, keep in mind I have only dealt with 16-20 ton machines, not 1200lb machines, so white grease might be acceptable.

    I guess if this thread stays alive, I will post what I find..
  5. KTO Enterprises

    KTO Enterprises LawnSite Bronze Member
    Messages: 1,286

    I have always used timken bearings in the hubs on my race cars, and used the valvoline synthetic grease. Its a little more expensive but i never had a problem with anything messing up, but then again I don't think my hubs saw the rpm that a blade spindle does. The only thing I figure is that lithium grease holds up to the heat and friction better.
  6. Audrey

    Audrey LawnSite Senior Member
    from Pa.
    Messages: 570

    I don't. Either Pennzoil or that Mystik stuff from Tractor Supply.
    I am very religious with applications though. I grease more frequently than manual suggests. Grease is cheap.


    PS: Congrats on the new Scag! :clapping:
    I knew you were demoing.....
  7. Rons Rightway Lawncare

    Rons Rightway Lawncare LawnSite Bronze Member
    Messages: 1,164

    I use high temp grease or sometimes marine grease, and grease all the fittings every 50 hours.
  8. ronniez71

    ronniez71 LawnSite Member
    Messages: 68

    i use mobil 1 lithium works great for me on my 52 ultimate floater smooth start when i engage the blades!
  9. Envy Lawn Service

    Envy Lawn Service LawnSite Fanatic
    Messages: 11,087

    OK, since two others have said it, I'm going to spout off now.

    The bearings are Timken tapered roller bearings like mine unless they have changed.

    This is my spindle.

    This is yours.

    If you check out Timken you will find they produce their own greases.
    I couldn't find the stuff around here so I started to research.

    The first thing that comes up is "Timken OK load".
    This is something most greases will not put on their label or in their specs.
    So sorry... I won't use those greases.

    Here is some good info right from Timken's site.
    So, I decided to look at the synthetic greases.
    None of them list a Timken OK load rating, so I moved on.

    In the end, I settled on CRC Sta-Lube Sta-Plex Premium Red grease.

    Lists mowers as an application
    Lithuim complex
    Base Esters
    Flashpoint - TCC Method 475°F
    Timken OK Load [Lbs.] 80 Lbs
    Working Temp [Degrees F] 0 to 400°F (300°F continuous)
    4 Ball EP 88 LWI; weld point 800+
    4 Ball Wear 0.4 typical
    Drop Point 500+°F
    Low Temp Torque 15.5 Max
    Oil Separation 5% Typical
    Oxidation Stability <10 Lbs
    Pour Point [Degrees F] +5°F
    Water Washout 5% typical
    Worked Penetration 265 to 295
    ISO Viscosity Grade 220

    Pretty stout specs, pretty nice price and easy availablitiy at NAPA.

    In fairness to synthetics, this one called Green Grease also has a Timken OK of 80 lbs.
    No other specs I know of published.
    It's about $8 a tube at Advance Auto when they have it.
    Haven't seen it at Tractor Supply yet, but they are supposed to have it.

    Same issue with other greases... lack of specs.
    CRC / Sta-Lube is the only one that seems to put out everything for the world to see.

    Mystik is the exception... available at Tractor Supply...
    Not quite as impressive on specs, but...
    Seems like a really good grease.
    Their white is slicker than snot, I can say that much...

    Anyways, I've been using the premium red without issues so far.
    Best choice or not, I don't know...

    I just tried my best and that's what I came up with.
  10. MJB

    MJB LawnSite Silver Member
    from Wa
    Messages: 2,869

    I've never had spindles that had to be greased. Mine have all been sealed. Are certain manufactures switching away from the sealed spindles? I never had a spindle failure on the sealed kind thats why I ask. I aggree on the premium red though.

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