Dodgeboy06
Member
Good morning. I'm working with a 333G Serial number 1T0333GMCJF325519 with about 2600 hours on it that was (according to the operator) was working just fine and suddenly all functions stopped. I got to the machine, verified proper oil levels and ran thru the diagnostics on the display in the cab to verify inputs were happening from the joysticks and outputs to what I believe is referred to as the port lock solenoid (its on the side of the valve body under the floor of the cab) and it was getting power based on what the in cab display was indicating even though I wasn't hearing that 'clunk' sound when the parking brake release button was hit. I ran to the dealer and got a new solenoid and valve, installed those and was able to get very slow response to the bucket/arm functions and could feel the track motors trying to go but were being stopped by the parking brake. This response was only when I had the engine at high idle nothing seemed to happen when at low idle. I also never hear that 'clunk' when the parking brake release button was hit. I asked the dealer to do a site visit and check pressures and figure out where the failure most likely was going to be, hoping there was a pressure sensor or another solenoid that had failed but understanding there could as easily be a failed pump or drive coupling. They were on site for about 2 hours yesterday and as far as I can tell never even put a pressure gauge on anything. The only suggestion they offered was to try to winch it up onto a trailer as 'it would be easier to work on this in our shop'. Gotta love that desire to figure out what's going on at least. Anyway I am meeting with an independent mechanic that has done work for me in the past who has some insight as to where we need to look but wanted to see if anyone might have had something similar happen or insight as to common failures of this system. Thanks in advance for any help that the group can provide and I update as I know more to help those that come after this.
