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replacing old grease fittings

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chuck grandgent

06-26-2004 11:47:09

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Looks to me like the previous owner of my Ford 8N neglected a lot of the grease fittings, some are even painted over that pretty red. Am I looking for trouble trying to remove and replace the old fittings ?(worried about them being really stuck), should I just try to clean the current fittings grease holes out ? What do people recommend ?

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Wayne

06-26-2004 21:47:03

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Re: replacing old grease fittings in reply to chuck grandgent, 06-26-2004 11:47:09

As long as they are still taking grease and aren't damaged then there is no need to change them. Like one post stated most fittings, at least in the older equipment, are simply threaded in so the only thing you'd need to do is unscrew one and screw a new one in in it's place. If one of the fittings has old hard grease/gunk built up in the hole and won't take fresh grease, remove the fitting and clean out as much of the hole as possible with a screwdriver, etc. Then treat it like you would a stuck fitting and fill the hole with a penetrant, like PB Blaster, Liquid Wrench, etc. Then put the fitting back in and hit it with the grease gun again. It may take several times of filling it up, and you may need to wait a litle bit after you put the penetrant in to give it time to work before it thins the blockage enough to flow free. Eventually the combination of the penetrant and the force behind the grease will cause the penetrant to flow through the rest of the blockage and break it up allowing the fitting to take grease like it is supposed to. In my experience this will work 99% of the tie if your persistant with it, but there are the times when nothing works short of dissasembly of the joint and a good cleaning. Good luck.

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Tom in TN

06-26-2004 12:56:40

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Re: replacing old grease fittings in reply to chuck grandgent, 06-26-2004 11:47:09

Chuck,

I've replaced many grease fittings on all kinds of machines over the years. They are simply screwed into the components that they are in, and can be unscrewed easily with a small box end wrench. Fittings, usually called grease zerks, are simple devices. They are comprised of a ball bearing that is captive inside the zerks. The ball bearing has a compression spring behind it that pushes the ball tightly against the face on the inside of the zerk. When you push grease against the end of the fitting by pumping your grease gun, the presurrized grease simply compresses the spring that is holding the ball bearing against the inside face of the fitting and allows the pressurized grease to enter the fitting.

I'd recommend that you replace any fittings that won't take grease.

Good luck,

Tom in TN

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Ron

06-26-2004 13:38:39

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Re: Re: replacing old grease fittings in reply to Tom in TN, 06-26-2004 12:56:40

There are some tractors that use drive-in grease fittings. NAPA has both.

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Alvin NE WI

06-26-2004 17:56:27

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Re: Re: Re: replacing old grease fittings in reply to Ron, 06-26-2004 13:38:39

and metric

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Joe (Wa)

06-26-2004 20:09:32

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Re: Re: Re: Re: replacing old grease fittings in reply to Alvin NE WI, 06-26-2004 17:56:27

And also self-tapping. Most grease in the era that tractor was built will be 1/8" npt. I would clean the socket end off and try the grease gun on it. If it is plugged with hard grease or leaks back through the check, then you might want to replace them.

Joe

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