What oil to use in my Speedaire Compressor?

I have a speedair model 5Z185B air compressor(model #on the pump itself is 2Z499C. I need to know what type of oil to use for an oil change.







Bill answers...

Hi Perry and thanks for writing in.

It were me, I wouldn't obsess about the oil. If my compressor was out of warranty, I'd just visit the local compressor shop and pick up enough of their compressor-rated oil for the job.

On the other hand, if you want specific brand advice (particularly if the compressor is still under warranty) visit this page, click on the Speedaire link in the nav bar, and follow the guidelines to find your closest Speedaire depot. Give them a shout. They'll give you specific advice.

Cheers,

Bill

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Dayton 3Z960. Inter cooler lines.

by Chris Milliken
(Corpus Christi Tx)

Dayton 3Z964 Pump 3z960 Sr.541788. Graiger said it was discontinued 20 years ago. No info available. On the enter cooler next to the HP head there is two fittings. The one on top was broken off. I am assuming it was a un-loader. Installed a 65 PSI unloader.

In the other port someone install a 2 inch nipple, (Not Original), then a device that says PILOT on it with flow directions, ">|" and "<" and a barbed fitting in the middle. Then a copper line going to the top of the HP head. I know the copper line is Original. I don't know what is the PILOT for or if it is installed correctly. The "<" in on the cooler side and the ">|" is on the head side.

When the compressor is running air comes out of the Barbed fitting.

Should the copper line from the HP head go directly to the inter cooler?

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What is the default blow off pressure on a Dayton speedaire 3Z405

by Nate
(Palm Desert, CA)

Seems like the blow off used to trip a @ around 80 lately it has been 100PSI Just want to make sure it is safe for use still.

__________________
Nate, when you say "blow off" are you referring to the pressure switch shutting the compressor down, or the PRV letting go?

Regardless, if that pressure level is changing, it indicates that conditions on your air compressor have changed too, and you do want to find out what's going on.

Remedial action will depend on whether it's the pressure switch or the PRV that's blowing off.

According to what I could find at Grainger, the model number you provide is not complete, and therefore, I cannot locate any specifications on your air compressor.

I suspect though, based on looking at a range of small air compressors still available from Grainger (Speedaire & Dayton are their brands) that you shouldn't have any worry about safety with a compressor tank pressure of 100 PSI, as long as the tank is in good shape.

Cheers,

Bill

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