The power steering and hydraulic fans for the side radiator cooling system rely on hydraulic power.  Fluid in the hydraulic system is pumped through hoses by high pressure.  The benefit to hydraulic power is that a large amount of force can be transferred through small tubes and flexible hoses.  Using the correct fluid, for the application as well as specific operating parameters of the hydraulic system, is of utmost importance.

Timely maintenance and filter changes help to keep the hydraulic system clean and running at the correct operating temperature to assure proper function and long lasting duration.  The use of adequately sized reservoirs and proper fluids reduce leaks in the system by controlling fluid viscosity with temperature regulation.  This also helps to lessen friction through adequate lubrication in the pumps and fan motors.  Keep these properties maintained to reduce power loss.

Hydraulic fluid does not wear out unless it is overheated or contaminated by dirt and moisture.  Tight connections will further reduce the risk of leakage.  The hydraulic fluid reservoir and changeable filter are located in the rear engine compartment.   Some hydraulic fluids are clear and manufacturers will add a color, such as pink, to make it easier in detecting leaks.  If your hydraulic system fluid is clear, when checking fluid levels wipe the dipstick with a clean cloth and then carefully recheck the level.

Keeping the hydraulic fluid conditioned will produce a drop in pressure so the system can maintain control, provide a fast response and assure accurate timing.  Filters also play a vital role in helping to keep the systems clean and free of debris that can create costly repairs.  Conditioned fluid controls temperature.  Hydraulic fluid oxidizes due to heat and will no longer lubricate the parts as designed.  Following a regular maintenance schedule and changing fluids 15,000 miles or one time per year will keep the hydraulic system conditioned.

To flush the system, place the transmission in neutral, turn off the ignition, set the park brake and chock the rear wheels.  Raise front wheels off the ground using approved jack stands.  Place a drip container on the ground under the steering gear to catch oil drips.  Remove both lines from the steering gear return and allow oil to drain.  Turn the steering wheel from full left to full right four or five times.  This will purge oil from the gear.  Next, remove filter and supply line from reservoir.  Reconnect all lines and hoses.  Install new filter.  Once the system is flushed, slowly cycle the steering wheel from side to side three or four times.

Mixing different types of fluid in the system is only allowed when topping off the system with a half-quart or less.  In the event more than a half-quart is required, it will be necessary to drain the system and refill with the required fluid.

In the event the power steering or hydraulic fan system experiences a problem that requires a component be replaced, it is recommended that the system be flushed to remove debris from the lines and refilled with the required hydraulic fluid.