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).
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.
When the differential lock disengages, the indicator light
will go off.
Steering System
General Information
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.
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.
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.
02/09/96
f350079a
A
B
A. Turning Radius When Differential is Locked
(engaged)–Understeer Condition
B. Turning Radius When Differential is Unlocked
(disengaged)
Fig. 6.3, Turning Radius
Clutches, Rear Axles, and Steering
6.5
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