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  1. M

    How do I test a decel sensor

    I have been working on a JD 450J (s/n T0450JX139324) and have had some help from this forum. Engine starts but won’t throttle up and won’t move. One suggestion is that the decel sensor may be stuck. I took some readings and didn’t see any changes as I depressed the pedal. Got a new sensor and...
    • Msh2
    • Thread
    • Replies: 0
    • Forum: Dozers
  2. M

    John Deere 450J wont move

    We have a small bulldozer, s/n T0450JX139324, that we were using to clear fences with and the operator told me he had a problem. The dozer starts fine, but wont idle up, hence it wont move. Blade works fine. Error codes on dash screen: F423 and F9C3. The TCU also has codes flashing on it...
    • Msh2
    • Thread
    • Replies: 13
    • Forum: Dozers
  3. M

    LRG-425 won’t start

    I have a generator that is powered be an LRG-425i. Build date is 1/10/1999. Carbureted. Runs in propane. It wasn’t starting and we hired a mechanic to service it. Did a tune up - new plugs, wires, oil filter, air filter. Checked the radiator. It was low - the jacketed heater was too hot and...
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