Kellogg Compressor Resurrection Saga

Back in 2018 I bought an oooooold Kellogg American 335 of some sort. There was no data plate so I’m unsure of the exact model, might be a 335tv or a 335tvx. This post catalogs each video and some important things I learned along the way.

I picked up this ol gal for $250, but little did I know it needed a lot of refreshing to be up to the challenge of being mine.

Painting the horizontal tank with some Tractor/Implement paint and cheap paint guns.
Depressing news about that freshly painted tank. JB Weld over a hole in the tank. But we push on ahead and “change” the oil, air filter and get the pump ready to go…
Servicing valves, SUPER easy on this compressor, this thing was designed to run for a lifetime, considering it was built in 1966, maybe more than one by the time I’m done with it!
Finding out whats wrong with the leaky unloader. Explaining how it works and how to adjust it.
Total cost and final thoughts

All in all, more than I wanted to have into it, but man does it ever run nice. Everything we used to get this compressor up and running is available here:

Here are some hoses and other parts I highly recommend for your air system:

Once you have a big compressor you’ll likely want permanently plumbed air lines so you can have multiple connection points around your shop. I would highly recommend using pex pipe as it doesn’t have the explosive tendencies that PVC does. Here are the fittings I used to make that happen:

2 Comments on “Kellogg Compressor Resurrection Saga”

  1. Hi. I have a Kellogg 335tv that just started giving me problems. The electric motor labors really hard at about 40psi (sometimes 45psi). The motor labors so hard that it will stop and humm. If I don’t shut off breaker it will trip.
    I have checked numerous things…disk valves, tank check valve, no line blockages, etc. Anybody had this problem on their kellogg 335?
    Also I was wondering what the one copperline does that goes to the top of the conical front piece. It enters the crankcase. I know the bottom line is an unloader but I can’t figure out what the upper tube is for. Thanks in advance anybody!

    1. I believe the upper tube is the crankcase vent, I’d have to go put some eyeballs on my compressor to be sure, but I believe that it goes from the unloader cover to the intake of the pump.
      As far as the motor laboring, I’d check the motor first, could be something has burned out in it and it isn’t making the horsepower it should anymore.
      Failing that, it has to be something causing excessive friction or load inside the pump, which seems unlikely unless you’ve got a ring or bearing letting go.

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