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Thread: cat d7 3t waterpump leaking...serial #

  1. #11
    Join Date
    Jul 2020
    Location
    Saskatchewan
    Posts
    8

    Default rodney bork

    Thanks siescat, I got a piece of 5' graphite impregated 1/4" square rope on the way..Amazon...checked a couple ag supply dealers with no luck...I will keep that in mind if I ever need more. Thanks

  2. #12
    Join Date
    Feb 2007
    Location
    Wisconsin
    Posts
    71

    Default leon

    Quote Originally Posted by rodneybork View Post
    Hello everyone, Brand new to this informative forum...I hve a d7 3t crawler with a waterpump leak that started after sitting about 12 month when i started it on a nice day -20c last winter. It was a fast drip at that time, start it now and its a small stream that is getting thrown off the shaft.When i bought it it came with a spare engine (mostly stripped). The serial of the engine in the machine is 6S7879(ďoesnt sound right from what i read)...my spare parts 9engine is #3T5035. I was wandering if thats the origional engine....Also can that waterpump be sealed around the shaft without removal by adding some type of string or rope or teflan inside the cap? bellow? I read something about it but dont know really what i have for an engine, and/or waterpump. Thanks in advance for any info. Rodney
    /Mcmaster Carr supply has pump packing in several sizes, this is ideal for your situation.


    leon

  3. #13
    Join Date
    Jul 2020
    Location
    Saskatchewan
    Posts
    8

    Default rodney bork

    Thanks Leon, I got some graphite impregnated packing on the way through amazon.ca. Will likely just add more or possibly replace all the packing since I'm at it with new cut to the diamiter and overlapped staggered joints

  4. #14
    Join Date
    Dec 2006
    Location
    Liberty, NC.
    Posts
    3,335

    Default

    Erik Christenbury
    Cat List: More than some, less than others
    https://chriscomachinery.com/caterpillar-machinery/

  5. #15
    Join Date
    Nov 2006
    Location
    Corralitos, Ca.
    Posts
    15,405

    Default

    Yes, replace all the old packing. It's probably rock hard and will be tough on the shaft. Cut in individual rings with bias cut butt ends as you state, be good for another 70+ years.

  6. #16
    Join Date
    Jul 2020
    Location
    Saskatchewan
    Posts
    8

    Default

    Thanks Old Magnet.
    I will be sure to replace all the old packing with new. Much appreciated.

  7. #17
    Join Date
    Nov 2006
    Location
    San Gregorio Mariposa, CA
    Posts
    603

    Default

    Cat made a special wrench for that packing gland. I was able to use a vice grips chain wrench on my D8. A little heat and it broke free. Backed it off and cleaned threads, re packed it and does not leak a drop.

  8. #18
    Join Date
    Nov 2006
    Location
    Faunsdale, AL USA
    Posts
    4,418

    Default

    If youre digging the old packing out, avoid scratching the shaft. You can poke a tool in next to the housing and dig it out that way without hurting anything but better to avoid the shaft surface.
    D2-5J's, D6-9U's, D318 and D333 power units, 12E-99E grader, 922B & 944A wheel loaders, D330C generator set, DW20 water tanker and a bunch of Jersey cows to take care of in my spare time

  9. #19
    Join Date
    Dec 2006
    Location
    victoria australia
    Posts
    3,516

    Default Packing Adjustment

    Hi Team,
    the scan below from the 3T OMI grey book, Form No:-10481-06, Dated 02/56, tells how to adjust the water pump packing.
    The packing nut wrench is purposely short so as to help prevent over-tightening of the packing and so prevent burning of the shaft and packing due to running DRY.

    Follow the instructions as the packings are meant to leak a drip or two to allow water to flow thru to lube said packings.

    Cheers,
    Eddie B.
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