Greasing spindles

Discussion in 'Mechanic and Repair' started by hackitdown, Nov 4, 2012.

  1. hackitdown

    hackitdown LawnSite Silver Member
    Posts: 2,515

    I just replaced 3 spindle housings and spindle bearings on an Exmark Lazer HP. I replaced the Exmark sealed bearing with aftermarket Oregon parts since they cost so much less. The new bearing housings have grease fittings on the side of the housings. The housings are bolted under the deck.

    Since both my mowers have never required grease in the spindles, I don't know how much grease to put in there first time, and I don't know how often to grease, or how much goes in routinely. Exmark only specifies anti-seize for assembly.

    What is the typical way to grease these bearings? Thanks...
     
  2. Patriot Services

    Patriot Services LawnSite Fanatic
    Posts: 13,259

    Pump full until you see the seal just start to bulge. I usually have to add a pump a week, depending on use. Biggest thing is sticking to one brand/type of grease and not mixing them.
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  3. BigFish

    BigFish LawnSite Gold Member
    Posts: 3,364

    A word about Oregon spindles with sealed bearings and a grease fitting.
    The ones we use, and we use a lot of em , have sealed bearings, that is, the bearing is sealed on both sides. So you can pump yer a$$ off and very little, if any grease is gonna make it to the innerds of the brngs!
    I verified this by taking a new unit apart.
    So if ya wanna grease em, ya might wanna pop the bearings out and remove the inner seals.
    Now...back to the race!
     
  4. Patriot Services

    Patriot Services LawnSite Fanatic
    Posts: 13,259

    That would explain why they are so cheap. I've always stuck with OEM. Yea, you need to disassemble and pop off the inner seal. That's a dumazz shortcut they took.
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  5. captken

    captken LawnSite Bronze Member
    Posts: 1,707

    I have noted this as well. There is no way for the grease to get to the [sealed] bearing.
    We just pack the spindle housing with grease and coat the spindle as well on assembly.
    I think the only reason for you to add grease is to help keep water out. Now I never tried to remove the inner seals....and don't know how that will help as the bearing is now unsealed. I get replacement bearings from NAPA.
    kenny.
     
  6. Patriot Services

    Patriot Services LawnSite Fanatic
    Posts: 13,259

    With the inner seal removed grease will be forced into the bearings as well as keeping the cavity full. Water is only a real threat when you pressure was too close.
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  7. hackitdown

    hackitdown LawnSite Silver Member
    Posts: 2,515

    Thanks for the info. I don't know how to tell the difference between sealed and unsealed bearings.

    I don't see that there is any place for excess grease to squeeze out, so it is guesswork to know when to stop. Does it squeeze out at the bottom of the housing between the bearing and the housing?
     
  8. Patriot Services

    Patriot Services LawnSite Fanatic
    Posts: 13,259

    All of the above. The grease also adds to the cooling of the bearings by absorbing some of the heat.
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