Special Compound

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Jim, those zerk fitting mods can be dangerous–a lever action grease gun exerts about 3000 psi pressure which may blow any mechanical seals inside, as on a Cadillac flathead V8, not a S80/81 unless seals have been added. Cads and other cars with factory zerks on water pumps also came with a twist-knob-operated grease gun specifically for that purpose.

Ken, try to disassemble –GENTLY–that grease cup assembly. Suggest soaking it in lacquer thinner overnight. Grease cup may have been super-glued together–hope not. I wonder whether your pump–and the grease cup–have been modified in the past.

[Author nameAuthor names are only available to PAS members.]

George,

I will go ahead and soak it. We have tried to loosen it but it did not budge. I don’t know if it has been modified. Peter’s looks different than mine.

Ken

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George,

I just went back out to the car and looked at the cup where the lines were cut around it and thought maybe it was tacked together. I was able to pull on it and separated it. I assume now that all of the Grease Fittings are spring loaded. I learned something new.

Thank you,

Ken

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Ken,

My grease cup is not spring loaded, it screws down.

I also may have a few others of different types kicking around.

I will check and advise you.

Peter

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A correct series 80 grease cup is about 7/8″ diameter, and has a blade or wing on the top to help turn the cup. It has a spring loaded ratchet ring that engages the matching notches in on the rim of the cup, where it is threaded onto the housing.

Greg Long

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Greg,

Would it look like the one I posted in the pictures?

That seems to b the way mine works.

Thank you,

Ken

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Gents,

Just FYI, there are a TON of them of various sorts listed on eBay.

Peter

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