Why is the steering wheel stiff and heavy?

[McCassidy]

The reasons for a stiff and heavy steering wheel are as follows: 1. Insufficient power steering fluid: Normally, the steering feel is relatively consistent. If it suddenly becomes heavy one day or gradually gets heavier, it may be due to dirty power steering fluid. 2. Low tire pressure: Low tire pressure increases the contact area between the tires and the road surface, leading to greater friction and increased steering difficulty, resulting in a heavy steering wheel. This is not conducive to driving safety, and the tire pressure should be replenished promptly. 3. Overly tight bearing fit: A rolling bearing in the steering system that is too tightly fitted with sliding bearings can prevent proper lubrication, leading to stiffness and causing the steering wheel to become heavy. 4. Power steering system issues: The steering wheel and power steering system are closely related. If the steering wheel becomes heavy, it may indicate internal electrical contact issues or other problems within the power steering system.