What are the methods to adjust the lightness of hydraulic power steering?
2 Answers
By adjusting the pressure of the hydraulic system, the lightness of hydraulic power steering can be adjusted. Generally, there is a pressure adjustment device near the oil outlet of the power steering pump. There are mainly two types of power steering systems: one is mechanical hydraulic power steering, and the other is electronic power steering. Below is an introduction to hydraulic power steering: 1. With mechanical hydraulic power steering, the power steering pump does not stop running even when no assistance is needed, which can cause wear and tear on the engine. 2. Although electronic power steering does not affect the engine, its reverse rotation efficiency is lower than that of hydraulic power steering, and its response is also slower. Some mid-to-high-end cars use electronic power steering, and if the power adjustment is incorrect, the steering wheel may feel sluggish. However, due to the higher conversion efficiency of electronic power steering, it is gradually replacing mechanical hydraulic power steering.
My old Passat's steering wheel suddenly became as light as a toy car. After checking around, I found it was due to insufficient hydraulic fluid. I opened the hood myself and located the fluid reservoir—the one marked 'PS'. I topped it up to the MAX line while the engine was cold. If the fluid is as dirty as soy sauce color, it's best to replace the entire fluid system, and remember to have someone help you turn the steering wheel left and right to bleed the air bubbles. Also, check the tension of the power steering pump belt; if it's too loose, steering will feel heavy. If there's still no improvement after these steps, it's likely a leaking steering gear seal or a failing power steering pump, and you'll need to visit a repair shop. Aging rubber parts are common in older cars, so don't push it until complete failure before fixing it.
