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  1. M

    John Deere 644G Parking Brake Comes On when The Transmission oil warms up after use for about 30mins to 60mins

    Talked with a JD tech yesterday. He thought it might be transmission charge pump.
  2. M

    644G parking brake light comes on after 30min on work.

    hope someone can help. I have a 644g and after working it for about 30 mins,and warming the oil up. The boom hydraulics seems to chatter and it has a hard time lifting the bucket at low idle. It really makes the loader jump. At the same time the park break light comes on and throw the loader...
  3. M

    John Deere 644G Parking Brake Comes On when The Transmission oil warms up after use for about 30mins to 60mins

    Have you found anything yet. My machine is doing the same thing.
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