What Causes Heavy Steering Wheel in Trucks?
1 Answers
The causes of heavy steering wheel in trucks are as follows: 1. Steering gear failure: If inspection reveals low hydraulic pressure in the steering gear assist system, it indicates the steering gear is the cause of the heavy steering. Most steering gear failures occur due to piston or cylinder scoring, or damage to the piston seal ring, which allows communication between the two chambers, preventing effective buildup of assist pressure. Additionally, damage to various seal rings on the piston circumference or the seal ring on the steering screw can cause high-pressure unloading, reducing assist pressure. 2. Low fluid level or air in the system: If the power steering system is low on fluid, air can enter the system, resulting not only in heavy steering but also noise during steering. 3. Clogged return oil filter in the reservoir: Long-term lack of maintenance or replacement of the return oil filter in the reservoir can cause clogging, hindering the circulation of power steering fluid and increasing return oil backpressure, which also leads to heavy steering.