How power steering specialists Handle Heavy Steering
There is usually a physical cause of heavy or stiff steering and it is best to find out as quickly as possible to avoid costly mistakes when repairing your car.
Low Fluid Level
When Hydraulic power steering is used, the system relies on fluid under pressure to assist the rack and steering. The pump can not produce enough pressure if the fluid level has dropped. This type of problem is usually most noticeable when driving at low speed, i.e. when turning at junctions, or when pulling into and out of parking spaces. The problem can be diagnosed very quickly by checking the level of fluid in the reservoir, and then inspecting the hoses and seals for signs of damage or leaks.
Worn or Failing Pump
A worn power steering pump will not produce enough pressure to the steering rack, even with the proper amount of fluid in the reservoir. This condition can be diagnosed by checking the pump’s output pressure and comparing it to the manufacturer’s specified pressure. Typically, a pump that is only partially working will be replaced in its entirety as repairs to this component are not cost effective as the pump will only be providing partial assist to the steering.
Faulty Steering Rack
This would also cause heavy spots through the arc of steering. Power Steering Specialists would normally strip down the steering rack to investigate any scoring on the piston and also to check all the seals for any wear. If all the parts are found to be worn then the rack would either be repaired or replaced.
Seized Steering Joints
Corroded or dry ball joints and tie rod ends can cause heavy steering, regardless of the type of power steering that a vehicle has. The technician will go through the steering of a vehicle by hand to check for any binding. A joint that moves roughly or has excessive free play will need to be replaced.
Electric Motor Faults
On electric power steering systems there is no fluid, an electric motor and control module assist the steering. A fault with the motor or control module can cause the steering to feel heavy very quickly. This is a serious problem and the motor or control module will need to be checked and any faults logged as the heavy steering is a serious failure as far as the MOT inspection for steering are concerned.
Don’t delay – address any unusual heavy steering as soon as possible as it can quickly turn from a simple repair to a far more costly job.
