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Are the grease ZERKS on an X500 mower deck pressed in? Are they replaceable? With my grease gun nozzle tightened as tight as I can the grease still squirts out around it.
Jerry

I can't say for sure that the zerks are pressed it or not on your machine. Good zerks are screwed in, but the zerks you have may be a different size then standard zerks. You may try a different grease gun if you can from a friend or somebody. If a different grease gun does not work either you may have to change them. You can see the threads of a standard zerk and you can see how a wrench fits on it to remove and tighten it. I hope this helps. If you google image the words standard grease zerk you should be able to see what a zerk looks like before it is installed.

I have 2 guns and 3 tips all are loose.

You may have a bad grease gun coupler. They do come in different designs. 3 or 4 jaw or you can get what they call a needle nozzle. I sure wouldn't want to change the grease fittings to screw in style because the time you drill and thread them you will end up getting metal filing into your bearings.

(John Deere) does not call them grease zerks they call them grease fittings. If they take the time to call them grease fittings instead of what they have been called for decades and decades, then they have a special size fitting. They sell world wide so I'm thinking they use metric size grease zerks (fittings).

They probably go to a sealed bearing anyway so don't waste your time being concerned whether they take grease.

SeniorCitizen said:

They probably go to a sealed bearing anyway so don't waste your time being concerned whether they take grease.

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I have seen this, but where I have seen it is on pillow block bearings. Grease fitting and sealed bearings. I will just take a guess here but I will say that any fittings on his mower has a reason for being there. If he can't get a 3 or 4 jaw grease gun coupler to work which I have seen happen, I have has very good luck with either a nozzle or point grease gun coupler. You can buy them from most auto parts stores. I own and seen the point grease gun coupler to grease the bar tips of chain saws. I will say a nice new 3 jaw grease gun coupler will take care of his problem. Yes I do think that different manufactures make grease fitting in just a little different sizes but that shouldn't prevent them from taking grease.

SeniorCitizen said:

They probably go to a sealed bearing anyway so don't waste your time being concerned whether they take grease.

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I would try replacing one or two grease fittings and see if they that grease, maybe two or three pumps after you change the zerks. If they take grease after the change then go on and replace the ones that don't take grease.

SC you maybe right about sealed bearings, but manufactures save money by not installing grease fittings with sealed bearings, so my guess is that the bearings are greaseable.

gfp55 said:

I would try replacing one or two grease fittings and see if they that grease, maybe two or three pumps after you change the zerks. If they take grease after the change then go on and replace the ones that don't take grease.

SC you maybe right about sealed bearings, but manufactures save money by not installing grease fittings with sealed bearings, so my guess is that the bearings are greaseable.

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Yes it wouldn't hurt to replace some fittings to see if they take grease. You said they were press in type fittings which takes a special driver to install them. What I used before I bought this special driver was a small socket. They can be a little tricky to install without the driver.

reynoldston said:

Yes it wouldn't hurt to replace some fittings to see if they take grease. You said they were press in type fittings which takes a special driver to install them. What I used before I bought this special driver was a small socket. They can be a little tricky to install without the driver.

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I never said they were press in zerks.

The first post the OP asked if the were press ins if I read it right?? You are right just maybe they aren't. All the better if they are screw in fitting, Problem solved. One thing you wouldn't get me to buy into is the metric fittings is the reason they don't take grease.

I have 3 couplers. two that came with the guns and a 4 jaw I bought. I have seen the needle couplers will they work with the ZERKS/fittings?
Jerry

If you really wnt to know go to the John Deere web site and look at the parts break down for your particular model.
If the grease nipples are not shown as a separate part then they are pressed in.

bckskin2 said:

I have 3 couplers. two that came with the guns and a 4 jaw I bought. I have seen the needle couplers will they work with the ZERKS/fittings?
Jerry

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The couplers come in different styles. Some have a cup shape end and others are more like a needle. Yes the work very well with zerk/grease fittings.