Zerk spitting grease - Snowblower Forum : Snow Blower Forums
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post #1 of 16 Old 10-22-2019, 11:56 AM Thread Starter
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Zerk spitting grease

While preparing my machine for the coming winter, one of the steps is to grease under the pressure plate.

When I pump grease in the zerk that is there, the plate lifts a bit.

Something unexpected happened this year. The plate did lift, but as soon as I remove the grease gun from the fitting, the plate slowly lowers while the fitting spits what looks like all the grease I pushed in there. It's not coming from around the fitting, but through the zerk's hole itself. So I guess it's not holding grease anymore.


What do I do with this ?

1999 Craftsman 11.0/31 (C950-52930-0)
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post #2 of 16 Old 10-22-2019, 01:25 PM
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Put in a new Zerk fitting, they usually screw in.
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post #3 of 16 Old 10-22-2019, 05:48 PM
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Grease is retained in the zerk through a spring loaded ball that seals the zerk opening. Likely the spring or ball have failed so the fitting needs to be replaced as oneacer says.

2015 Ariens Platinum 30 SHO - model 921040
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post #4 of 16 Old 10-22-2019, 06:56 PM Thread Starter
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Ok, are these fittings standard or are there many variants (threads and such) ?

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post #5 of 16 Old 10-22-2019, 09:14 PM
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Originally Posted by broo View Post
Ok, are these fittings standard or are there many variants (threads and such) ?

Take the bad one out, and bring it to an automotive parts store. Or, most hardware stores. No need to pay the dealer's high prices. They will only be about a buck.
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post #6 of 16 Old 10-24-2019, 06:51 PM
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Most screw in. But there are some that are pressed in. Only way to tell is to remove it and see if it has threads. On my older Ariens 10,000 series, on the axle collar there is a grease fitting that is pressed in. It has ridges on the end that go into the axle collar to prevent it from coming out.

Last edited by Landngroove; 10-24-2019 at 06:53 PM.
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post #7 of 16 Old 10-24-2019, 09:54 PM
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FWIW, my Platinum does exactly the same thing. I over greased my augers and had a nice little stream of grease squirting back out. Wiggled the rotors back and forth and more came out. (Rotors are well greased however).

Anyway, I came to the conclusion that if you overfill the joint, the excess is ejected out of the zerk. There doesn't appear to have a check in these zerks, as they're not a high pressure fitting anyway.

Same as what you find on mower deck spindle zerks. (No grease is needed in a spindle anyway, they are just breathers to let moisture out. But people still insist on shooting grease in them thinking they are greasing the "sealed" bearings).

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post #8 of 16 Old 10-24-2019, 10:00 PM
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You just need one grain of sand getting in and you can be sure it will sit between the ball bearing and the seat. It will stay open and spit the grease back out until pressure equalizes. Always clean the zerk before adding grease. You can have standard threads or metric depending where it was made.


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post #9 of 16 Old 10-24-2019, 10:03 PM
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Always wipe my zerks before injecting. Well aware of dirt. All three have always done this, since new.

Try it on yours, overfill the zerk and the excess will be ejected back out.

2014 Ariens 24" Platinum
2010 Yard Machines 600 Series, 24" w/179cc MTD engine
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post #10 of 16 Old 10-24-2019, 10:13 PM
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Never happened to me, maybe I just don't overfill. Seen it on heavy machinery though. Mechanics change them a lot.


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