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  1. #1
    I get the honor .. no ... the Priveledge of replacing a fifteen horse in the morning.

    I was there early today preping it for my co-worker to show with the new unit.

    I noticed the oil sensor screen was all plugged up with metal grit.
    The compressor had broken the crank or something like that ... I was told.
    No compression and very little amperage draw ... was the diag I was told yesterday.

    Anyway, since this unit is filthy inside, and since it shares the oil system with three other units, I thought I might need to do something to clean the oil system up.

    Should I ??? And how?


  2. #2
    Join Date
    Sep 2001
    Location
    East Stroudsburg, PA
    Posts
    13,215
    Change the oil in the rack.

    Change all the filters/cores.

    Clean the oil separator screen and float.

    BTW. Your company certainly seems to change out a LOT of compressors! What gives?

  3. #3
    Join Date
    Jun 2001
    Location
    Michigan
    Posts
    12,077
    I was thinking the same thing.

  4. #4
    We just took over this acount last November.

    This particular unit went down due to a flooding "demand cooling valve".

    The stores in general are held captive, so to speak by corperate management's desire to spend a dollar to save a dime.

    The engine room I am in now, looks like something on "the Arizona".
    I have never seen so much rust and grey paint.



    This stuff has tremendous potential. But corp is in the midst of a revamp again, so they are not spending right now.
    Pitty.



    Dave, thanks for the info. That is what I thought.
    I guess I'm gonna be there awhile......

  5. #5
    Join Date
    Jun 2001
    Location
    Michigan
    Posts
    12,077
    You will learn to hate that corporate game. I hear you loud and clear.

    Oil management and oil issues I have somewhat myself always have not been very good at with racks, but about 3 years ago or so I had such a run on problematic oil issues that I seemed to aquire the neccesary knowledge.

    In my experience. Regulators if they seem to overfeed, change em, don't try to clean em. I think Dave will disagree with me but. Ther separator float and screen. A good thing to clean when into a system. At least drop the float and inspect. Plus this way you'll be able to charge the separator with oil since your changing the oil anyway.

    Every core, every filter on that rack, change.

    All pumps with new oil.

    And then let that prick run for about a week and come back and do her again.

    I have witnessed guys having to do three or four oil changes to get all the crap out of it. It's not commen but I have seen it.

  6. #6
    Join Date
    Jun 2001
    Location
    Michigan
    Posts
    12,077
    I forgot to mention the oil pump screen on each pump. when you got the oil out, pull that screen too.

  7. #7
    Join Date
    Jul 2001
    Location
    Gold Coast of Connecticut
    Posts
    4,586
    I prefer to never except in the most extreme low temp R-22 applications change compressor oil. You can never get it all out of the rack or piping. I add a changeable core sporlan oil line filter and change it 2 or 3 times in a year and the oil gets very clean. I clean seperator floats and almost never play with the screens in the seperator unless i have an extreme problem getting oil back into the resevior.

  8. #8
    I got the unit changed out and runing.

    Damn!!!

    Everybody with the company was outa town. So I hired a mechaninc fried of mine to assist in the heavy work.

    Always better with two guys anyways....


    It went fairly smooth. This new chain hoist, the expensive one, it is sure a nice thing to have. It made the job so much smoother .... didnt even need a come a long.

    Did bring an oak plank into the motor room though. It helped.

    Jus slid that puppy out on the plank then down onto the floor.

    This was my first fifteen horse, alone. It caused me to think everything thru.

    Like when I was hooking up the can, the jumpers werent in place on the new compressor. I think the last two I did had the jumpers already in place.
    So that part was a no brainer.

    Perhaps it was taken care of by the coworker I had that day.
    Anyway ... today ... there was NO coworker to fasten the jumpers in place. So I had to think; "where do they go?"
    So I began putting them in place for 230v.
    Then ...as a second thought, I measured the voltage for the unit and found the rack was on 480V!!! OOOOPS!!!

    Good thing I checked!
    So. ... I changed the brass jumpers and got it together.


    Danged if the sucker didnt come with the right gasket for the two piece discharge header pipe.
    And I looked for the gasket everywhere. Nothing on the truck either.
    So we made one for temporary. Used some thin cardboard, soaked in oil.
    Not too shabby, for something done in a pinch.

    It only leaks just a tiny bit..... will replace it soon

    I was lookin over the rack for all the driers and cores I need to replace tomorrow.

    Four suction, two liquid, one 303.

    Wish I had an air rachet! That's an awful lota bolts to do for all them drier cores!


    I dont know a thing about those oil separators, other than in theory.
    Never had to fiddle with them in the past.


    The oil system uses a C303 flare drier. Should I just replace that rig with a Sporlan core set up? It's better in the long run for cleanups, right?




    When it was time to do that deman coling set up, I went out and bought the whole new kit & caboodle.
    Man what a high price ...

    Anyway, when I got the new stuff mounted, I happened to notice there wasnt a power cord to the old controller.

    hmmm....

    Then I noticed it laying on the floor, underneath the rack.

    hmmm.... (not a good sign....not good at all)

    So I inspected the wiring inside the rack control panel... OMG!!!

    Let's NOT talk about what kind of moron worked on this system last.....

    The solenoid to the demand cooling was wired hot!

    To make matters only worse, when I fired this sucker up.... I was checkin all the stuff...you know... the usual stuff.... and so I pushed in the reset button on the OIL PRESSURE SAFETY SWITCH ..... and guess what DIDNT happen???

    That's Right!!! NOTHING HAPPENED!!!

    AUGH!!!

    How do these guys ever last in this industry???


    So because some idiot fouled up the oil pressure safety, the unit had absolutely NO protection against liquid flooding of the bearings! Then when same jerk or another jerk ... came along and wired the demand cooling hot .....all the time .... the bearings washed away and the crank broke!
    And the unit jus kept on hummin along!!!


    I guess I'm gonna be there awhile tomorrow.

    Boy you shoulda seen that Astro van sink down when the forklift loaded that fifteen horse copeland into the side door this morning....
    It was a wonder the front wheels even stayed on the ground!


    Reverse went out this morning.... getting a new van on Monday.
    I'm on call this weekend.


    Am I organised yet? ......... what do you think?


    (not a chance .....)


  9. #9
    Join Date
    Sep 2001
    Location
    East Stroudsburg, PA
    Posts
    13,215

    Exclamation I'm too tired to read that whole thing, Bob.

    But what you're looking for is either a Sporlan "OF-303" (Throwaway oil filter.) or, preferably, the "ROF-413". Replaceable core oil filter.

  10. #10
    Join Date
    Feb 2003
    Posts
    1,166
    [QUOTE]Originally posted by R12rules
    [B]I got the unit changed out and runing.

    Damn!!!



    It went fairly smooth. LOL

    Then ...as a second thought, I measured the voltage for the unit and found the rack was on 480V!!! OOOOPS!!!
    And I looked for the gasket everywhere. Nothing on the truck either.
    So we made one for temporary. Used some thin cardboard, soaked in oil.
    Not too shabby, for something done in a pinch.
    It only leaks just a tiny bit..... will replace it soon
    Let's NOT talk about what kind of moron worked on this system last.....
    The solenoid to the demand cooling was wired hot!
    To make matters only worse, when I fired this sucker up.... I was checkin all the stuff...you know... the usual stuff.... and so I pushed in the reset button on the OIL PRESSURE SAFETY SWITCH ..... and guess what DIDNT happen???That's Right!!! NOTHING HAPPENED!!!
    AUGH!!!
    How do these guys ever last in this industry???
    So because some idiot fouled up the oil pressure safety, the unit had absolutely NO protection against liquid flooding of the bearings! Then when same jerk or another jerk ... came along and wired the demand cooling hot .....all the time .... the bearings washed away and the crank broke!
    And the unit jus kept on hummin along!!!
    I guess I'm gonna be there awhile tomorrow.
    Am I organised yet? ......... what do you think?

    Sounds like a compressor change nightmare, how many man hours were added to this atrocity due to the previous screwups. Hope it was'nt quoted or someone's got a smooth explanation for the customer to get some extras. At least ya saw it through and won the battle. You're sure gonna learn fast working for this outfit!! Best of Luck!



    Watts New, Ohm My, I been Electrically Commutated. Are U2.

  11. #11
    Join Date
    Apr 2004
    Posts
    18
    on 460 volts the wires for the three legs are colored brown, orange & yellow.

  12. #12
    Join Date
    Jan 2004
    Location
    Earth
    Posts
    4,879
    Use only quality oil filters, the cheap ones tend to disintegrate. Cleaning up after that mess, is a real joy.
    A Diamond is just a piece of coal, that made good under pressure!

  13. #13
    Join Date
    Feb 2004
    Location
    Santa Rosa CA
    Posts
    5

    Thumbs up

    Sounds like you have found a good job that is challenging. PTL.

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