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420D axle

Discussion in 'Tractor/Loader/Backhoes' started by Numbfingers, Sep 7, 2017.

  1. Numbfingers

    Numbfingers Well-Known Member

    Joined:
    Oct 28, 2016
    Messages:
    136
    Occupation:
    mechanic
    Location:
    Alaska
    Guys, I gotta rebuild the rear axle on a 420D due to serious metal/brake disc material contamination. I've already disassembled it 90% for damage inspection. Two questions:
    About how many hours to rebuild with all new bearings, discs, plates? Gears are fine.

    Is there any tips on removing the large ring gear from each axle housing so I can make sure it's thoroughly cleaned?
    I have a 20 ton shop press, and 55ton hollow center ram with puller rod.
    Any info would be appreciated.
     
  2. Mark250

    Mark250 Senior Member

    Joined:
    Aug 30, 2015
    Messages:
    1,223
    Occupation:
    heavy equipment technician
    Location:
    victoria,Australia
    i would leave it wear it is as it is pressed in and has to be pressed out
    upload_2017-9-7_17-47-25.png
     
    Vetech63 likes this.
  3. Numbfingers

    Numbfingers Well-Known Member

    Joined:
    Oct 28, 2016
    Messages:
    136
    Occupation:
    mechanic
    Location:
    Alaska
    Yeah, that's what I figured. I pulled the races out of the axle housing today, hosed out all the metal from the insides, and cleaned out the center section too. I used my new shop press for the first time to remove bearings from the right planetary and axle shaft. Worked great! SIS calls for a bridge tool 1U-8814 to determine shim thickness behind the differential bearing race set in the inner brake housing. The tool costs $1072!! Didn't see one on eBay either. I talked to the local Cat dealer service manager but they weren't sure if they had it either, asked me to call them back in the morning. If they don't have it maybe I can figure out another way to determine the required shim thickness. Any ideas?