Hello everyone. Hoping someone can help me. have a 2000 Bobcat 873G that won't move when the hydraulics are turned on. The lift arms will go up and down and the drive gears will move back and forth, but the brake pins will not disengage. I checked the fluid in the reservoir and chain case. Both are fine. I tried different combinations of lifting the arm, overriding the traction control and back down. Brake on and off. I can't get the brake pins to disengage. any thoughts or advice from anyone? Can I bypass or force the pins? Are they pins or are they relief valves? I must be honest in saying i don't fully understand the hydraulic system. I have the service manual, but there's quite a bit to these machines. My next and only option is to pay the $250 call out fee which i really don't want to do. If I can get it to roll, I can get it up on the trailer and take it in. thanks.