Clutches, Rear Axles, and Steering on the accelerator to relieve torque on the gearing, al- lowing the differential to fully lock. The indicator light comes on when the differential is fully locked. When the differential is locked, the turning radius will increase be- cause the vehicle understeers. See Fig. 6.3 . Drive cau- tiously and do not exceed 25 mph (40 km/h). When the differential lock disengages, the indicator light will go off. Steering System General Information A When there is no load on the vehicle, and the front tires are pointed straight ahead, the steering wheel spokes should be at the 4 and 8 o’clock positions, or within 10 degrees of either side. See Fig. 6.4 .
See Group 46 of the Cargo Workshop Manual for steering adjustment procedures. B Power Steering System The power steering system consists of a steering gear (which includes a manual steering mechanism, a hy- draulic control valve, and a hydraulic power cylinder), hydraulic hoses, power steering pump, reservoir, and other components. The power steering pump, driven by the engine, provides the power assist for the steering system. If the engine is not running, there is no power assist. 02/09/96 f350079a A. Turning Radius When Differential is Locked (engaged)–Understeer Condition B. Turning Radius When Differential is Unlocked (disengaged) Fig.
6.3, Turning Radius If the power-assist feature does not work due to hydrau- lic fluid loss, steering pump damage, or some other cause, bring the vehicle to a safe stop. Do not drive the vehicle until the cause of the problem has been cor- rected. To unlock the main differential, depress the bottom of the control switch. Briefly let up on the accelerator to relieve torque on the gearing, allowing the differential to fully unlock. 6.5