TROUBLESHOOTING After towing another machine loosen the counter-nut (4) and the threaded stud (5) by turning it anti-clockwise until it reaches the limit stop. Hold the valve (3) in position using a wrench an re- tighten firmly the counter-nut (4). Perform these operations on both valves. When the engine is switched off, the power-assisted steering is not operational, i.e. you have to apply much more force to steer the machine. If you lift up the rear axle of the machine with a lorry-mounted crane, you can tow off the machine over longer distances and at speeds exceeding 1.2 mph (2 km/h). Before you do this you must, however, remove the cardan shaft of the front axle.
In ad- dition, secure the articulated steering with the locking bar, in the same way as it is required for transport of the machine on a low bed loader or by train. TOWING A MACHINE WITH DEFECTIVE BRAKES If the brakes of the machine that you want to give a tow are defective, uncontrolled movement of the machine may cause a crash while it is being towed! Always use two machines to tow off a machine with defec- tive brakes. Connect all three machines with appropriate towing attachments. If you want to tow a machine a with defective brakes, or if you have to tow a machine driving downhill, use two machines for towing.
Attach the machine that you want to give a tow to a larg- er machine with sufficient tractive and braking force. Attach a second machine to the rear part of the machine that you want to give a tow. In this way, you avoid uncontrolled movement of the machine. Towing can be performed under various conditions. Thus, it is impossible to determine all the requirements that may apply to a particular condition. When towing on an even and horizontal sur- face, the tractive force that you need is much less than the trac- tive force that you need when towing on a slope or uneven surface. Please ask your local Komatsu dealer for details, if you want to give a particular machine a tow. 6-15