. OPERATION EXPLANATION OF COMPONENTS FRAME LOCK BAR WARNING to lock the front and rear frames during transporting the machine. It prevents the TOWING PIN 2. Use linch pin (3) to set so that the towing pin does not come out. 3 - 58 When c arrying out maintenan ce or tra nsporting the m achine, always set the frame lock bar to the Always remove the frame loc k bar for travel operation s. If it i s not removed , the steering wheel ca nnot be used for steering an d thi s may lead t o serious damage or injury. This maintenance front and rear or wh frame 1. I nser t towing pi n (1) into hole (2) in the counterweight. everse t his op eration to remov e the pin.