Vacuflush Pump rebuild technique?

Discussion in 'General Maintenance/Repair Questions' started by dtfeld, Dec 7, 2019.

  1. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    Jun 5, 2016
    Milton, GA
    410 Sundancer
    2001
    Axiom 12 MFD
    Cat 3126 V-Drives
    I have my vacuflush pump out of the boat and rebuilding it on the bench with new bellows and duck bills. No instructions that I can find. I have a couple questions.

    1. Does the bellows bolt need any lubrication/grease? If yes what kind?
    2. Lube the orings or replace dry?

    Dave
     
  2. NotHerDecision

    NotHerDecision Well-Known Member

    Jun 28, 2016
    Houston, Texas
    2001 Sea Ray 460 Sundancer
    2014 Seadoo 155 LTD
    2105 Seadoo 130 SE
    2013 Mercury Dinghy
    Cummins 6CTA 8.3L
    I use dish soap for both. The only thing I will say with the bellows bolt is the motor needs to be rotated in a straight up and down position so it’s not cockeyed when you’re putting it together. You should have 2 o rings. One for the pump housing and 1 on the bellows.

    muratic acid is you friend when cleaning all that.
     
  3. carterchapman

    carterchapman Well-Known Member TECHNICAL Contributor SILVER Sponsor

    Mar 25, 2008
    Lake Chickamauga/Marietta, GA/Ft. Myers, FL
    2006 Sea Ray 58 DB
    MAN CRM V8-900s, Twin Disc Drives; Onan 21.5 Generator
    Dave,

    I used silicone grease on all O Rings and the base of each duckbill - which acts like an O Ring. The first one I rebuilt I did not use any and the pump ran every couple of minutes. Redid it with the silicone grease and no problems. Needless to say, clean all the surfaces well before reassembly.

    You can get it in the HD plumbing section (get two tubes - they are small - $3 each) or order it online...
     
    JVM225 and Chris-380 like this.
  4. Marc Rainaldo

    Marc Rainaldo Member

    87
    Apr 18, 2019
    Netherlands
    Sea Ray 500 DA 1994
    Detroit diesel 6v92
    And don’t forget: handtight fasten is more then enough.
    Also don’t forget the 2 o rings in the ball shaft in your toilet and the 2 big seals :)
     
    Chris-380 likes this.
  5. 340 Ray

    340 Ray New Member

    5
    Dec 7, 2019
    310 Dancer For Sale
    350 / III's
    If you are doing the toilet seals always do the ball at the same time. The old ball will take out the new seals in no time.
     
  6. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    Jun 5, 2016
    Milton, GA
    410 Sundancer
    2001
    Axiom 12 MFD
    Cat 3126 V-Drives
    and I cracked the body...

    I think this is an S body? Dometic website shows a different color/material? Maybe an improved design LOL!

    Going to buy the fitting as well, PO used some kind of pipe dope all over thus stuff.

    20191207_132135.jpg
     
    Last edited: Dec 7, 2019
  7. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    Jun 5, 2016
    Milton, GA
    410 Sundancer
    2001
    Axiom 12 MFD
    Cat 3126 V-Drives
    Now I see this...
     
  8. 340 Ray

    340 Ray New Member

    5
    Dec 7, 2019
    310 Dancer For Sale
    350 / III's
    Updating the motor to the new longer style and changing out the bellows was one of the best things I did. Unit now cycles in about 45 seconds or less. Pretty fast fix, wear gloves.
     
    techmitch likes this.
  9. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    S body = suction = vacuum.

    T body = transfer = overboard discharge.

    The difference is in the number of duckbills.

    Where is it cracked? Fixable?
     
  10. Strecker25

    Strecker25 Well-Known Member

    Nov 20, 2014
    Rochester, NY
    1998 290 Sundancer
    Twin 5.7EFI/Alphas, Kohler 4kw
    Yeah, I don’t see the crack, maybe you can plastic weld or epoxy? The vacuum is held beyond the bellows in the tank so if you can seal it up I bet you’ll get away with not replacing the housing. I’m sure that Part is not cheap
     
  11. NotHerDecision

    NotHerDecision Well-Known Member

    Jun 28, 2016
    Houston, Texas
    2001 Sea Ray 460 Sundancer
    2014 Seadoo 155 LTD
    2105 Seadoo 130 SE
    2013 Mercury Dinghy
    Cummins 6CTA 8.3L
    Honestly it’s best just to buy the entire pump instead of the housing. It will cone assembled and now you have spare parts.
     
    dtfeld likes this.
  12. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    Jun 5, 2016
    Milton, GA
    410 Sundancer
    2001
    Axiom 12 MFD
    Cat 3126 V-Drives
    Cracked on the mold part line on the inlet. I used some JB Weld and Ill put a clamp on it once dry. Part is about $100. New pump $750:(, $585 without motor. Ouch.

    Crack.PNG
     
    Last edited: Dec 7, 2019
  13. NotHerDecision

    NotHerDecision Well-Known Member

    Jun 28, 2016
    Houston, Texas
    2001 Sea Ray 460 Sundancer
    2014 Seadoo 155 LTD
    2105 Seadoo 130 SE
    2013 Mercury Dinghy
    Cummins 6CTA 8.3L
    I could have sworn I paid 399.00 for the entire thing motor included. I’m mobile at the moment so can’t look it up but I really think 400 gets you a whole new pump.
     
    dtfeld likes this.
  14. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    Jun 5, 2016
    Milton, GA
    410 Sundancer
    2001
    Axiom 12 MFD
    Cat 3126 V-Drives
    for $400 thats more interesting.

    Honey! Guess what I want to Xmas? Poopy Potty Parts!!
     
  15. hottoddie

    hottoddie Well-Known Member

    Jan 11, 2012
    Boston/Cape Cod
    1986 Sea Ray 390 EC
    Garmin 4212 Chartplotter
    Garmin 24 HD Radar
    Garmin 546s Plotter
    454 Crusaders

    Where is the crack? I just rebuilt my S pump earlier this afternoon. Mine is the older clamp type as yours is the 8 bolt type housing. I used white lithium grease (brake lube) as it is not petroleum based which may attack the rubber components. And yes apply grease to the shaft bolt as well.
     
  16. Marc Rainaldo

    Marc Rainaldo Member

    87
    Apr 18, 2019
    Netherlands
    Sea Ray 500 DA 1994
    Detroit diesel 6v92
    DDD58A15-F747-462F-9413-E8FA5A4D3F97.jpeg
     
  17. hottoddie

    hottoddie Well-Known Member

    Jan 11, 2012
    Boston/Cape Cod
    1986 Sea Ray 390 EC
    Garmin 4212 Chartplotter
    Garmin 24 HD Radar
    Garmin 546s Plotter
    454 Crusaders
    I believe the whole pump assembly is close to $800. My rebuild parts were about $160. Does not include the motor as mine is fine. Once the motor is bad might as well replace the hole assembly.
     
    Last edited: Dec 19, 2019
    dtfeld likes this.
  18. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    Jun 5, 2016
    Milton, GA
    410 Sundancer
    2001
    Axiom 12 MFD
    Cat 3126 V-Drives
    I tried JB Weld, but it didnt hold. Bought the new body.

    I have everything back together, but its barely generating vacuum. What do I need to adjust? Really dont want to break something else.
     
  19. Marc Rainaldo

    Marc Rainaldo Member

    87
    Apr 18, 2019
    Netherlands
    Sea Ray 500 DA 1994
    Detroit diesel 6v92
    Nr 10 on the picture I posted before is a common problem when less vacuum is generated.
    But are you sure there are no vacu leaks anymore?
    Does The pump stops?
     
  20. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    Jun 5, 2016
    Milton, GA
    410 Sundancer
    2001
    Axiom 12 MFD
    Cat 3126 V-Drives
    I tried it on the bench and in the boat...small amount of vacuum generated. I pulled it and brought it home to adjust. So far new body, bellows (#10) and 4 duck bills.

    Pump never stops running.
     

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