I got an old Clark TM15 (TM145) 48v forklift that have some problem with moving forward/reverse. The lift and tilt works fine. The engine-contactor click and engine starts with the direction-handle as well as the steering. When pushing throttle the directional-contactors click and the wheels move with little "torque" but not enough to move the forklift. When raised the wheel from ground the wheels start spinning and after a while the "highspeed"-contactor klick. If I start with the "highspeed"-contactor shut the forklift are moving on ground with only on highspeed.