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Recent content by 808Dave

  1. 8

    Quincy recipe compressor: rusting valves, electroplate?

    Were you convinced that the rust was causing a problem, vs being "not right?" My pump had similar issues, but didn't have a (noticeable) problem getting up to pressure. In my case, I'd made an ill-considered mod in reconfiguring the pump to serve a new upright receiver: there was no low-point...
  2. 8

    air compressor bane: water condensing in crankcase oil

    Funny, I was on my way back from NAPA with all the quarts of SAE30/ISO100 non-detergent they had on their shelves around the time your message must've come through (not sure why this forum - like some others - persistently will not notify me...) But I'm not down for the 'change it often'...
  3. 8

    air compressor bane: water condensing in crankcase oil

    A bit over a year ago I completed a prolonged, expensive and at times excruciating rebuild of a Quincy reciprocating compressor (model 340-33) that had fallen victim to unseen water-accumulation in the crankcase oil. In this model (with no sight glass) condensed water builds up below the oil...
  4. 8

    RFQ: one-off hydraulic bender cylinder adapter

    Hey all - please see links to PDFs of 3D views of the two small components I'm needing, and send me a quote if it looks like it's up your alley. I'm open to changes and suggestions to suit your tooling. Thanks - Dave Cylinder adapter: custom threaded head for SPX cylinder E.pdf - Google...
  5. 8

    maybe another Chinese VFD thread...

    I am still awaiting some basic components to arrive (tank check-valve and pressure-switch/unloader) but I really wanted to see how the VFD would perform, even if just in a temporary barebones setup, so I went ahead with prelim testing this morning. Results were very encouraging. My missteps in...
  6. 8

    maybe another Chinese VFD thread...

    Steve, Seems you and Johansen disagree on the MOV aspect of this. My 'CYA' take is that, since the seller tells me to set the VFD up "stock" (I ran the MOV suggestion by him yesterday) and he'd be the guy to cover it under warranty, I'd best stick with the stock setup this round. No external...
  7. 8

    maybe another Chinese VFD thread...

    Steve - I - thanks for the details. Per my reply to jraef I've attempted to address some of these same issues. If there'd been a 20HP-rated VFD that would accept a 240VAC single-phase input, I'd prolly have bought it. Unloading: I'm building this from scratch, and pump has no unloader built...
  8. 8

    maybe another Chinese VFD thread...

    Thanks, Jraef. I knew this was a concern going in, but the seller says it will work and has a 100% ebay rating, so I was willing to test the limits, what with the seller also indicating internal protection will keep the smoke to a minimum in the event of an overload. Is there a purely...
  9. 8

    maybe another Chinese VFD thread...

    Thanks dkmc - took me a couple of reads to realize it was a facetious suggestion, but regardless, not in the realm of helpful. --Dave
  10. 8

    maybe another Chinese VFD thread...

    Jeez...should I offer a bonus for responses that don't involve the offhand dismissal of this VFD? If the VFD doesn't work for some reason, then seller stands behind it, and it wasn't expensive to begin with. At that point I will fall back on a static phase converter (more than the VFD cost) or...
  11. 8

    maybe another Chinese VFD thread...

    I see where you're coming from, Bill. In a sane world where VFDs are nowhere available for as little cost as at least SOME are now (quality remains to be assessed), at least part of that would make sense, but consider: - the new VFD was $300 and change - both the 5HP and 10HP motor were...
  12. 8

    maybe another Chinese VFD thread...

    Update: The Hong Kong ebay seller (plc-expert) apologized for being on vacation with no autoreply, and indicated he would stand behind my intended use of his VFD, so I felt OK about proceeding with the purchase. I just received it - a 7.5kW VFD - for the 10HP 220V single-phase motor in my...
  13. 8

    maybe another Chinese VFD thread...

    Thanks, non-avuncular-Bob...good stuff. I didn't fully explain about the spun bearing on the old 5HP - the inner race locked up with the outer probably from simple lack of grease, and spun on the shaft, it appears, in its previous life at Pearl Harbor somewhere. As you'd expect, that event...
  14. 8

    maybe another Chinese VFD thread...

    I'm piecing together a compressor for personal use to include occasional cabinet sandblasting, but generally more likely to be used for paint work during any given session. There's no hope of three-phase service here - 240VAC single-phase is what I have to work with. Pump is a Quincy model...
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