Spindle bearings missing seals on D110 deck
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    Spindle bearings missing seals on D110 deck

    I am in the process of replacing the spindle bearings on my D110 mower deck. When I took them out, I noticed that the lower bearing (closest to the blade) was missing the seal on the inner surface of the bearing. Since they are supposed to be sealed bearings, they really shouldn't have to be greased. Is the missing seal and the zerk fitting to allow us to grease a normally "sealed" bearing? If so, then wouldn't the spindle have to have a significant amount of grease to keep it in contact with the bearing? That's a pretty big cavity to fill.

    Seems to me to be a poor design. I've only got 34 hours on the tractor and the lower bearings are shot. The upper ones that are completely sealed are still in good shape.

    Any advice as to whether I should remove the seal on the new bearings to match the removed ones?
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    jgayman's Avatar
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    It depends on where the zerk and grease holes are in relation to the bearings. On my old 175 Hydro the grease came out the spindle between the two bearings. The original sealed bearings failed within the first season or so and when I replaced them I noticed they were sealed. So where was the grease going?

    When I replaced the bearings I removed the two inner seals on the new bearings so they could accept grease. 20 years later and I was still running on the same set of spindle bearings.

    Yes - it is critical that you put in enough grease to fill the spindle cavity. Once filled then it will only take a little bit of grease added to get pushed into the bearing.
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    Lower bearings are not sealed on the top. Top bearing is sealed top and bottom. That's why there is a zerk fitting, so the lower bearing can recieve grease.

    Sent from my LGL52VL using Tapatalk
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    Quote Originally Posted by xcopterdoc View Post
    Lower bearings are not sealed on the top. Top bearing is sealed top and bottom. That's why there is a zerk fitting, so the lower bearing can recieve grease.

    Sent from my LGL52VL using Tapatalk
    Wouldn't you want to remove the bottom seal on the top bearing? Otherwise the top bearing isn't going to get any grease.
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    I have no idea why Deere did what they did.
    At one time there was a zerk and both bearings were sealed. Fitting was for a one time greasing from the factory.. Makes sense eh!

    Sent from my LGL52VL using Tapatalk
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    Quote Originally Posted by ToddRM View Post
    I am in the process of replacing the spindle bearings on my D110 mower deck. When I took them out, I noticed that the lower bearing (closest to the blade) was missing the seal on the inner surface of the bearing. Since they are supposed to be sealed bearings, they really shouldn't have to be greased. Is the missing seal and the zerk fitting to allow us to grease a normally "sealed" bearing? If so, then wouldn't the spindle have to have a significant amount of grease to keep it in contact with the bearing? That's a pretty big cavity to fill.

    Seems to me to be a poor design. I've only got 34 hours on the tractor and the lower bearings are shot. The upper ones that are completely sealed are still in good shape.

    Any advice as to whether I should remove the seal on the new bearings to match the removed ones?
    Are you still in your warranty period with the tractor with that few hours?
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    Quote Originally Posted by ToddRM View Post
    I am in the process of replacing the spindle bearings on my D110 mower deck. Seems to me to be a poor design. I've only got 34 hours on the tractor and the lower bearings are shot. The upper ones that are completely sealed are still in good shape.
    Do you use the deck clean out port a lot that attaches to a garden hose?
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    Quote Originally Posted by SulleyBear View Post
    Are you still in your warranty period with the tractor with that few hours?
    I think the warranty ran out last month. Besides, the nearest dealer is about an hour away and I have no way of getting it there.

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    Quote Originally Posted by jgayman View Post
    Do you use the deck clean out port a lot that attaches to a garden hose?
    Nope. I don't cut wet grass so it stays pretty clean. I remove the deck to clean it when the grass starts building up.
    Last edited by ToddRM; 06-15-2018 at 08:17 AM.

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    Quote Originally Posted by jgayman View Post
    It depends on where the zerk and grease holes are in relation to the bearings. On my old 175 Hydro the grease came out the spindle between the two bearings. The original sealed bearings failed within the first season or so and when I replaced them I noticed they were sealed. So where was the grease going?

    When I replaced the bearings I removed the two inner seals on the new bearings so they could accept grease. 20 years later and I was still running on the same set of spindle bearings.

    Yes - it is critical that you put in enough grease to fill the spindle cavity. Once filled then it will only take a little bit of grease added to get pushed into the bearing.
    Since the bearings are so inexpensive ($14.99 for pack of ten), I decided to do an experiment. On the one side, I left all the seals installed. On the other side, I removed the inner seal from the bottom bearing. I greased them both. I didn't bother with removing the inner seals from the upper bearings since they were in good shape, and unless the grease was under pressure, gravity would prevent it from getting into those bearings anyway. If one starts making noise, I'll remove them and inspect for wear. Might take a while though. Thanks for the replies!

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