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  1. J

    580E fanbelt replacement

    My backhoe suddenly overheated and I discovered the fanbelt was totally missing. I had just roaded it about 5 miles to a family member to dig a hole. There's a Youtube that claims you can finesse a new belt by just moving the hydraulic pump slightly, rather than draining the hydraulics, pulling...
  2. J

    Missing T10649 washer in my JD450C pressure relief

    I had an incompetent mechanic do some work on my dozer while I was recovering from back surgery, and he put the 6way valve back together without the washer below the shims in the bypass adjuster, resulting in very low pressure. I'm looking for a hint at the approximate thickness of the washer...
    • jimg
    • Thread
    • Replies: 0
    • Forum: Dozers
  3. J

    Yanmar B3-6 overheating

    I'm embarrassed to say I cannot find the radiator cap on my gray market mini. The "overflow" tank is fine, but I need to check the coolant level in the radiator. I have a VIO-30 manual that describes there being one, but not where it might be. My radiator is under the right side skin, but I...
  4. J

    B3-6A info?

    I recently acquired a Yanmar B3-6A mini-excavator. It's a Japanese market machine, so there is almost no info on the web, and none at all in English. The dealer says is's "sort of" similar to the ViO30, but it has a sideways articulate arm (instead of pivot). I found one for sale in Japan...
  5. J

    450C Float function

    I just had some work done on my 81 Deere 450C (6505) by a local mechanic, and he tells me that "float isn't working" and he couldn't find a rebuild kit for the 6way valve. I thought he did something to break it, but when I got the unit back today, it works the way I thought it always did. This...
    • jimg
    • Thread
    • Replies: 10
    • Forum: Dozers
  6. J

    Access to JD450 brake band?

    My '81 JD450C (6405) had a recent problem with the right hand brake/clutch lever. The brake got suddenly "grabby", then failed altogether. The lever will come all the way back with no affect. I think the clutch still works, but if I'm on level or downhill ground, I can't turn right (except by...
    • jimg
    • Thread
    • Replies: 18
    • Forum: Dozers
  7. J

    JD450C issues

    Due to health, distractions, etc. my 1981 450C has been sitting unused (under a roof, at least) for several years. It has two problems in particular that I need to fix: 1) The 6-way blade angle function is "stiff". The linkage is fine, but the plunger into the spool valve is stubborn. I...
    • jimg
    • Thread
    • Replies: 3
    • Forum: Dozers
  8. J

    Gland removal - 580E

    I've got a 580 Super E that the bucket is acting weak after I abused it with some very cantilevered loads (bridge girder placement). I'm trying to rebuild the bucket cylinders, and the left one was a piece of cake. I only needed a pipe wrench to remove the gland. The right cylinder has been a...
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