Page 2 of 2 FirstFirst 12
Results 14 to 21 of 21
  1. #14
    Join Date
    Nov 2011
    Location
    DFW area
    Posts
    10
    Post Likes

    Carrier teardowns

    Quote Originally Posted by smith21 View Post
    Have a carrier 19xr with 29,000 hours. At what interval is a teardown recomended?
    The 19XR is very similar to the DK ,especially if it has the older Kingsbury design Thrust assembley just like the D series which Carrier has the 3 year and 6 year inspection in the old green task code book and the new gray one. but that being said

    I've had to teardown some19XR chillers with as little as 18,000 hours that the low speed shaft had already gotten into the bull gear and rotor on the low speed thrust end of the bearings, Most of the ones I've seen damaged this way you can find the alarm history full of surge, high condenser press , and so on.
    Some of the bearingsI've changed seem to have a little copper plating. I would agree about oil analysis, vibration analysis,

    I would also say around 10 years or 25,000 hours for a little preventive maintance even if vibe and oil checks OK I would schedule a teardown and replace all the orings, gaskets and seals including the ones on the fittings and oil heater

  2. #15
    Join Date
    Mar 2015
    Posts
    2
    Post Likes
    Quote Originally Posted by ESS CHILL WATER View Post
    Hi Can share with you the complete scope of work for ST1 , ST3 , ST6 this particular code we handling internal when i just work for the factory , let me check with my papers and certanly can share with you .

    regards

    Oscar
    Hello Oscar,
    Did you ever get the ST1, ST3, ST6 info from ESS and if you did, can you share it with me?
    I spoke to our local carrier rep about getting a copy of the ST6 to validate the 30k hours/overhaul requirement run time hour interval for our 17FA and 19 FA and he told me it doesnot exist except by word of mouth.
    Thanks for any help on this issue.

    My contact email :alan.degracia@sce.com

  3. #16
    Join Date
    Oct 2011
    Location
    Upstate NY
    Posts
    115
    Post Likes
    I'll first start out by saying, like I had in an earlier post on this thread, that I prefer the use of analytical tools (oil analysis, vibration testing).

    Talking to a well respected veteran in the business on the subject once, he asked me "if you went to the doctor for a physical, would you have the doctor check your heart with a stethoscope and some blood work or open your chest up to have a look?"

    .Great analogy for me...

    To answer your question about the ST1,3 and 6 intervals. Carrier's old task books did have recommended bearing inspection intervals such as high speed bearing inspections and the Stop Major (complete compressor diassembly and bearing inspection) on ALL 17/19 series machines, but I haven't seen a Carrier Task book in years...

    It's kinda funny to see now on Carrier's own website that they offer BOTH "predictive services" AND "scheduled comprehensive inspection services"

    I interpret this as talking out of both sides of their mouth...

    But maybe some would see it as good business practice. Let the customer decide kind of thing...

  4. #17
    Join Date
    Nov 2010
    Location
    Sao Paulo, Brazil
    Posts
    85
    Post Likes
    Hi ESS, if you could i'd like to keep a copy about those docs, if you could share, I'll really appreciate follow my email:moraes.jesse@gmail.com
    Best regrads

  5. #18
    Join Date
    Aug 2010
    Location
    Lake charles,La
    Posts
    1
    Post Likes
    ESS Chill Water I just took over a contract that has 4 1000 Ton 19xr's. The customer is asking about performing a bearing inspection on each machine. The machines are 5 years old. I have not had a chance to make it over and get the hours off the machines yet. I know for certain that one machine has pretty much ran nonstop from startup. which should put around 30,000 to 40,000 hours on it. The others will have slightly less. I spoke to him about allowing me to perform some predictive diagnostic (Vibration and oil) and then go from there but he is pretty adamant about performing the inspection. I also would like any information/Literature that you have on the ST1,ST3 and ST6 as well as a teardown manual if possible. I am a York mechanic primarily with probably 60% of my work being on York machines and 30% on Tranes and then the last 10% on Carriers. So forgive me for my ignorance on some of the Carrier recommendations. Any help would be appreciated. Thanks
    Last edited by beenthere; 07-15-2016 at 04:23 PM. Reason: email

  6. #19
    Join Date
    Jan 2004
    Location
    PA
    Posts
    72,806
    Post Likes
    Email addresses are not permitted in post. Please put it in your profile, thank you.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  7. #20
    Join Date
    Mar 2015
    Posts
    2
    Post Likes
    holliea01,
    You should go forward with the diagnostics (oil analysis and vib) to get an understanding of units health to see what you will be discovering on a tear down since the owner is adamant about a bearing inspection. We have 17&19 FA units and my discussion with a local vendor rep is that a rule of thumb for the overhaul interval 40k hours. My discussion with this vendor on bearing wear indicated that full load operation will result in minimal bearing wear. Low load/surging would have an impact on bearing life.
    I have tried to find the ST6 manual myself as indicated in a previous post but with no success, hence the rule of thumb input stated above.
    I will look in to what manuals I have that may be of use to you when I return to work next week.
    I would also suggest that you look into subcontracting with a carrier vendor to support your tear down efforts, this would give you the exposure to tech and vendor document expertise for the first go around to give your customer what he wants.

  8. #21
    Join Date
    Jul 2016
    Location
    Georgia
    Posts
    78
    Post Likes
    Another vote for if it aint broke and the oil testing is good let it run.
    Have some at 70K+ hours, but did discuss with the owner its time to tear down and inspect.
    Now they are trying to find their wallet lol.

Page 2 of 2 FirstFirst 12

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Related Forums

Plumbing Talks | Contractor MagazineThe place where Electrical professionals meet.
Comfortech 365