How to repair Power Steering on Truck

To undertand on how to repair the power steering problem you must know first how power steering actually work.

Power steering generally divide into 3 part:
- Hand Steer include rotary valve
- Oil Pump
- Wheel drive

Hand Rack Steer

Under the steer part there is rack and pinion or recirculating ball. The part of rack and pinion as on the below picture.

The fluid of hydraulic system is sent from rotary pump that rotate using engine of car when running. This pump is driven via a belt or pulley depend on your car use. Hydraulic power for the steering is provided by a rotary vane pump.

Power steering work assist driver only when he is exerting force on the steering wheel. They key of the rotary valve is a torsion bar. The torsion bar is a thin rod of metal that twists when torque is applied to it. The top of the bar is connected to the pinion or worm gear (which turns the wheels)

Problem on power steering
If there is a problem on the power steering system make the work of the article above will fail to work and make the steer feel heavy. If your steer feel heavy it should be check all of the power steering system work. You can check from the easies one.

1. Wheel drive part, wheel drive involve tire itself and front wheel drive rod and ball joint. All this part should be check, if your fron tire already bare it can make your steer feel heavy. Ball joint already worn out it make your steer not feel balance, the front wheel rod drive may already worn out on the joint can make your steer feel rocking and can make heavy.
2. Your steering shaft may have problem do to of corrosion on the joint of your shaft, this condition make your steer is hard to move. Steering shaft problems can arise due to the constant movement of the shaft. When turning the steering wheel, if the return of the rotation seems to stick, there may be corrosion on the shaft or on the attached couplings. Also, there should be no jiggling of the assembly. Loose shafts can hinder steering function and accelerate wear on the system.
3. After you check of the two above have nothing then you go to the pump and gear box for this condition you must go to the car repait shop. First you see on the rack and pinion are there any oil leakage on this part if yes you must unloading the rack and pinion part, and open and change all the seal on this part. 
4. The end problem may happen on your rotary pump, you can open this pump, if the part of rotary pump already worn out you can change with new part, but if housing of pump shaft already worn out better you buy new one. Those all how to overcome the problem on power steering system. Hope can help you, Enjoy Reading.