PRINCIPLES OF OPERATION. (cont)
HYDRAULIC SYSTEM. (cont)
Dual Crossover Relief Valve (Figure 1-49). Located at right and left sides of the frame above the front
axle. An adjustable relief valve in each housing controls oil flow for earthmoving components the steering system.
Steering Wheel Pump (Valve) (Figure 1-50). Mounted at the steering console in the cab, steering wheel is
attached to the pump shaft. When the steering wheel is turned, the valve directs oil to the steering cylinders to produce
the desired amount of turning at the front wheels.