i cant find a tag on machine for ID.pulled tires off right side to look at brakes and they must be internal. there is an axle with gears and the drum has a gear.all looks in good shape. the forklift has a Perkins diesel with auto trans with high and low. easily weighs 12,000. also noticed the high low shifter wont move but forward and reverse does and wants to move in reverse or forward when shifted but left wheel spins and right is locked up. loosened up brake line and no pressure to lock up brake.can i put a load on forks and put in neutral and rock forklift with bobcat to break loose or will i brake something? thanks???