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Zf backlash on case loader

Discussion in 'Wheel Loaders' started by Midnightmoon, Nov 9, 2021.

  1. Midnightmoon

    Midnightmoon Senior Member

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    Having a problem with the etched backlash in ring gear. Axle is a zf mt l3085 dk. Backlash is etched in ring gear problem is I dont understand it. Reads ? 20211109_115603.jpg o86 but who knows. . .086mm seems tight 20211109_115603.jpg
     

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  2. Delmer

    Delmer Senior Member

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    8 and 6 are clear enough. Is the first "digit" a German 1, and the second either a sloppy 0 or a symbol that means "between" so between 1 and .86 mm? but 1 mm seems high. Doesn't seem like a German would etch such a sloppy 0.
     
  3. Midnightmoon

    Midnightmoon Senior Member

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    Or do you read it 980v
     
  4. Midnightmoon

    Midnightmoon Senior Member

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    Talked to a zf tech the number is 1086 and is the backlash number yet being an old unit he wasn't sure what it ment and said to go with 8 to 10 thousandths. I still wonder what 1086 could be in metric. The upside down v is a one in German and it's why there is a line through a 7.
     
  5. mg2361

    mg2361 Senior Member

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    Does the pinion have the same number? They usually do to show they are a matched set. On a ZF, the numbers that matter are usually stamped in the end of the pinion and on the housing for pinion depth and those numbers generally appear something like this: 88,0 on the pinion and 119,80 on the axle housing. Once the pinion depth is checked then backlash is a function of just moving the ring gear and that spec is in a manual, not stamped on the ring gear. Most axles would be around .007" - .015" I would imagine. Then tooth pattern also needs to be checked with Prussian Blue.
     
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  6. Midnightmoon

    Midnightmoon Senior Member

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    Case manual and zf manual send you to etching in ring gear for backlash. I set it at 9thousandths and checked pattern. No number on pinion
     
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