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Old Jul 26, 2009 | 10:15 AM
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Default Zerk Problems

Worked on a friends 59 and thought things were going well until I came across zerk fittings on the right king pin (2) and lower control arm (1)that would not accept grease from either a manual grease gun or a compressed air shop grease gun.

Removed the fittings and determined they were not the issue.

Any suggestions on how to resolve the problem?

Thanks

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Old Jul 26, 2009 | 10:25 AM
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Originally Posted by SILENT BOB
Worked on a friends 59 and thought things were going well until I came across zerk fittings on the right king pin (2) and lower control arm (1)that would not accept grease from either a manual grease gun or a compressed air shop grease gun.

Removed the fittings and determined they were not the issue.

Any suggestions on how to resolve the problem?

Thanks

Bob,

Have had that problem on some fittings. I find that moving the suspension "around" a bit, opens the pathway for the grease. Just turning the steering wheel may allow grease to flow into the kingpin, but in most cases I find I have to raise the tire and suspension to free it up.

That is assuming it is just metal to metal contact blocking the grease. If it is old hardened grease, that is a different matter, and may need higher pressure or maybe even repair/replacement.

I use an air powered grease gun and have the air at 125 psi minimum. This works "most" of the time.

Plasticman

Last edited by Plasticman; Jul 26, 2009 at 10:28 AM.
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Old Jul 26, 2009 | 10:27 AM
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If they won't accept grease with new fittings, the old grease has probably solidified; time to take it apart.

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Old Jul 26, 2009 | 10:33 AM
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Sometimes jarring the adjacent area with a two pound hammer will let grease go in. Other times, acetylene torch works. The heat will melt the hardened grease. When I say "heat", a little common sense on what that means goes a long way.
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Old Jul 26, 2009 | 10:35 AM
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What do you mean by "would not accept grease"?

If the grease will just not go into the fitting, then the grease inside the part has probably hardened.

If the grease just oozes out from between the zerk fitting and the fitting on the grease gun, most likely the zerk fitting has a ding around the edge. We have lots of farm equipment with grease fittings and invariably, if the grease oozes from the top of the fitting when trying to lubricate it, there is usually a small dent in the zerk fitting. If you take the fitting off the grease will pass through it, but, under pressure, it will leak. Doesn't take much of a dent to cause leakage.

Charles
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Old Jul 26, 2009 | 11:28 AM
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Thanks for the info.

A little more info - the fittings in question have taken grease about 3 months ago so I don't think the grease has dried out/solidified.

The tip about moving the suspension and raising the wheel is a good one and I'll give it a try along with a smack with a hammer.

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Old Jul 26, 2009 | 01:19 PM
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Originally Posted by SILENT BOB
Thanks for the info.

A little more info - the fittings in question have taken grease about 3 months ago so I don't think the grease has dried out/solidified.

The tip about moving the suspension and raising the wheel is a good one and I'll give it a try along with a smack with a hammer.

The hammer and moving/relieving weight off the suspension both do the same thing. They tend to relieve pressure against the grease passage.

Now that I've had a few minutes to think about this, back when I was a grease monkey in a gas station, it used to be quite common to use either or both methods to grease a car. Especially the king pins. Those old cars had a LOT of fittings on them. I'm thinking a late '50's Buick had something like 28 zerks to grease every few thousand miles.
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Old Jul 26, 2009 | 08:13 PM
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Sometimes it helps if you take the zerk out, poke around and loosen some of the grease, then squirt in a shot of MMO (Marvel Mystery Oil), re-intall the zerk then shoot some grease in
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Old Jul 27, 2009 | 01:30 PM
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Originally Posted by MikeM
I'm thinking a late '50's Buick had something like 28 zerks to grease every few thousand miles.
C1 Corvettes only had 27.
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