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Thread: Cat D7E track adjustment

  1. #1
    Join Date
    Mar 2019
    Location
    Louisiana
    Posts
    16

    Default Cat D7E track adjustment

    Look at pictures and advise if right and/or left need to be adjusted. If adjustment is required explain how and where measurement should be taken for proper adjustment.

    Thank you in advance for your time and effort.
    Attached Images Attached Images

  2. #2
    Join Date
    Jan 2013
    Location
    Yoakum, Texas
    Posts
    707

    Thumb Track adjusting...

    The photo of the right side track is well lighted and I can see that the tracks are the later model S.A.L.T. (Sealed And Lubricated Track) design. The SALT tracks must be run looser than dry tracks or damage to the seals will result causing the loss of oil and the rapid wear of the pin and bushings. The tracks look to be only a little loose, it won't harm them to run as is until you can get the info you need. You need to get the information on the SALT tracks from your Caterpillar dealer and the info for the tractor from ebay. You will need a Operation And Maintenance Instructions book and a Parts Book.
    Craig

  3. #3
    Join Date
    Mar 2009
    Location
    yuba city,california
    Posts
    1,199

    Default

    Looks okay to me, but when the backside of the pad starts slapping against the top of the final drive housing, definitely tighten up, so they donít wear a hole in the case. Mine have hydraulic adjusters that you pump grease into via zerk fitting and a grease gun.

  4. #4
    Join Date
    Nov 2006
    Location
    Buffalo Grove Il
    Posts
    275

    Default

    The zerk that JM is talking about is under the little door between the carrier rollers
    Chuck C

  5. #5
    Join Date
    Oct 2011
    Location
    Corryong Vic Australia
    Posts
    722

    Default

    Without knowing if the tractor has rolled to a stop travelling forward or not, it is hard to comment as to the correct tension of the tracks shown in the photo's. However they do not look too loose, I would not like to see them any tighter, in fact they could run even more loose. Too many operators run their tracks far too tight and this causes the most damage and premature wear. if you over tension SALT tracks the oil is forced out between the mating surfaces of the pin and bush, galling occurs resulting in excessive internal wear resulting in seal failure.

    I spent a huge amount of my time loosening track tension off on my machines and scolding operators for always wanting to over tighten tracks, sent all of them off to a dealer evening on how to look after tracks, even after that some of them still wanted to over tighten.

    Maybe OM or EDB might be able to give you the min and max clearances you are looking for on the string line.

    Regards, Wombat

  6. #6
    Join Date
    Aug 2008
    Location
    Paso Robles, CA
    Posts
    906

    Default

    One operators manual,don't remember for which (could be off color) says with a long bar you should be able to lift track 1 1/2 inches over career roller. But this is old style chain from the 1950's ,and the new lubricated is run with more slack. Hope this helps a little.

  7. #7
    Join Date
    Dec 2006
    Location
    victoria australia
    Posts
    2,978

    Default Track Adjustment

    Hi Team,
    have written much on this this over the years, SEARCH may find some of them.

    http://www.acmoc.org/bb/showthread.p...=TD15B+Vietnam

    Do not have late model OMI's or specs. for Salt Tracks, so cannot help you there--others have commented above with later experience of this track than I.

    Old school tracks were adjusted to 1 to 1.5" sag between the front carrier roller and the idler with the track pulled tight between the carrier rollers and the sprocket--usually a jump up and down or two on the track between the front carrier roller and the idler will achieve this.
    This slack should be maintained even as the track packs with the working medium--dirt etc.

    My personal experience with track packing was as an Australian Army Engineer Plant Operator In Vietnam, our TD15B's, with squeaky tracks, would be nearly hanging on the track frames by the time we ran a half mile or so back to camp. An Officer threatened to charge us if he saw any Plantie with tracks that loose again--within a week we had one unit with a broken track frame pivot shaft and another with a broken idler shaft and failed bearings--I loosened my tracks when I got to the work site each day and re-tightened them again when I got back near camp or the Plant Yard.
    Needless to say that before this event the boys had adjusted their tracks to the prevailing working conditions and off course they became loose again by the time we got back to the yard as the dirt shook out of the track components.

    The recoil is only to take out shocks from rocks, logs or such going thru the tracks as a seldom happen one off safety feature when such occurs. It is not for running against on the work site with packed undercarriage.

    Dirt etc. builds up in the root of the sprocket teeth and can compact onto the rail faces and idler runs as well as in the pin/bush bore and so cause the track to artificially tension up.

    Hope this helps.
    Cheers,
    Eddie B.

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