I’m having issues with my trans on my dozer. Early 90’s JD 650G with around 8500hrs. I have been operating it fine and a few times the trans wouldn’t go into gear. Didn’t have this issue when I bought it. I went to run it again and now it won’t move at all. I changed trans fluid, filter, and checked the screen and still nothing. It doesn’t seem to be getting pressure at all from what I can tell. I cracked the filter open and no fluid is coming out. Idk if it’s a bad pump or something else?!
Welcome to HEF Andrew ! Machine serial number? Do the hydraulics work?
The hydraulics works….i’ll have to get back on the serial number.
Do the brake pedals rise the 3" or so when you release the park brake? Here is a similar thread: HeavyEquipmentForums
No, they don’t. My park brake wasn’t even connected when I took the cover off. And the sensor is just hanging.
Direct drive machine or a torque converter machine? This is where a serial helps because either of those is split again by serial.
It’s a direct drive machine
Depending on your serial number, there were pumps on the direct drive machines with a seal issue that would let the oil drain back and the pump to lose its prime. Or, you could have a different failure within the pump if no oil is coming out of the filter.