WM 4800IN Test And Assembly Work On Power Steering (All Models): Information: General
Information
- The rack-and-pinion steering gear and power-steering pump must not be repaired or dismantled!
- Always replace the O-rings on hydraulic lines!
- Ensure absolute cleanliness at all times!
- PDCC: The reservoir must always be replaced if individual or multiple components, such as the tandem pump, PDCC valve blocks (FA/RA), PDCC anti-roll bars (FA/RA) are replaced (PDCC, not diesel).
- If system faults still occur after replacing a component (another component is defective), the reservoir does not have to be replaced again.
- Steel flexi-pipes must not be kinked or crushed.
- Observe safety requirements! → 4303AW SAFETY REQUIREMENTS FOR PORSCHE DYNAMIC CHASSIS CONTROL (PDCC)
Damage to the power steering is caused by insufficient oil in the hydraulic system. Even small leaks can cause the fluid to escape and damage the servo pump as a result of the high oil pressure in the hydraulic circuit.
Grunt-like noises on turning the steering to full lock or foam formation in the reservoir indicate a shortage of oil and/or the absorption of air. Before filling the reservoir, any existing leaks must be eliminated. In this case the oil level in the reservoir must be checked with the engine running as well as stopped! If the oil level drops to the bottom of the reservoir or bubbles rise up, then there is air in the hydraulic system.
Only Pentosin CHF 202 may be used in the reservoir. Pentosin CHF 202 can be ordered under the following part number: 1-litre container = 000.043.203.33.
A dipstick with a MAX/MIN marking is mounted on the reservoir cap. → Fig 1. The markings are for a fluid level with a cold engine (approx. 20 °C)!