1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Devilbiss compressor pump

Discussion in 'The Tool Shed' started by termin8ed, Mar 5, 2017.

  1. Mar 5, 2017
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    4,418
    Got my compressor hooked back up yesterday finally. Noticed the pressure shutoff valve is leaking more now than it was a year ago. Ill get a picture of it but its the rubber diaphragm/seal on the shutoff valve.
    2nd is i pulled the oil fill to see if there was oil in the crankcase while it was running and there was a bit of blowby. Normal?
    I cant seem to find any replacement parts for the 342 model pump.
    Anyone know of a supplier or if one of the other pumps are close enough that a repair kit for another model would work for some of the parts


    [​IMG]
     
  2. Mar 5, 2017
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    4,418
    [​IMG]
    Heres the pressure switch. I'm pointing to the diaphram thats leaking. I could get a newer switch i think but want to keep it old if i can. The woring box is square D.
     
  3. Mar 5, 2017
    Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Virginia Beach, VA
    Joined:
    Apr 28, 2011
    Messages:
    5,407
    I would say its normal . every engine/compressor has a little
    only check oil when off
    really can't tell . is blow off on same manifold as shut off switch
     
  4. Mar 5, 2017
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    4,418
    The switch comes off that manifold. The diaphram that is leaking is just under the box. Right above my finger. Looks like im pointing behind it kinda...
    That line goes to the front of the pump to release the pressure on the pistons so it will turn over easy to start. Cant think of the correct name for it right now.
     
  5. Mar 5, 2017
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    4,418
    I cant find anything online that resembles it. I dont have a pressure gauge either. Looks like the newer pressure switches have a spot to plumb in a gauge
     
  6. Mar 7, 2017
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    4,418
    Little better shot of it

    [​IMG]
    Underneath showing the disk/diaphram that is leaking
    [​IMG]
    And one of the compressor
    [​IMG]
     
  7. Mar 8, 2017
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,367
    I wouldn't worry much about blowby unless it forces oil out of the crankcase or won't get up to operating pressure. That's interesting that it says use automobile oil, doesn't even say to use compressor oil.
     
  8. Mar 8, 2017
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    4,418
    I wasnt too worried about the blowby but the diaphram leaking at the pressure switch i need to do something with. It looses too much air.
     
  9. Mar 8, 2017
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
    Joined:
    Mar 29, 2007
    Messages:
    5,916
    Wouldn't a 220VAC well pump pressure switch work just as well? They are adjustable for kick on/kick off pressure.
     
  10. Mar 8, 2017
    Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Virginia Beach, VA
    Joined:
    Apr 28, 2011
    Messages:
    5,407
  11. Mar 8, 2017
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    4,418
    Thats probably what ill end up doing. Wanted to keep it original but i cant find any info on google. That and the more i look at the switches, they dont really look that different from the old one. And my cover is missing anyways.


    Found my regulator with gauge and plugged it in today. Tops out at 175psi..........

    I dropped the line pressure down to 100. Surprised i didnt send the driver in my finish gun thru the drywall last night:whistle:
     
  12. Mar 8, 2017
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    4,418
    Looks like the specs are all good as far as motor current and pressure. I've allready got a seperate line for the unloader. Would that fitting on the switch work as a tap for pressure gauge or does the air on that second fitting get turned on and off as needed?
     
  13. Mar 9, 2017
    Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Virginia Beach, VA
    Joined:
    Apr 28, 2011
    Messages:
    5,407
    there is a tab inside that touches tip of unloader .when it shuts down , if you don't run a line to it . it doesn't do anything . from the sound of it . you already have one . so it would not be used . as to gauge . just install tee where your supply lines are
     
  14. Mar 9, 2017
    mullen46cj2a

    mullen46cj2a Member

    Harrisville, WV
    Joined:
    Apr 11, 2006
    Messages:
    71
    Is it possible to make a new diaphragm? Depends on how the stem is secured to the rubber, but you can buy diaphragm sheet rubber.
    Determine thickness of rubber needed and call L.J. at Hampton Rubber-Norfolk 757-858-1900 or you can buy it at
    McMaster-Carr
     
New Posts