Pump must be bled using technical service bulletin # ZF PS PUMP BLEED Rebuilt by the OEM supplier

Before installing this pump, you must replace the low pressure intake hose to it from the reservoir (very short hose). This hose turns hard and cracks underneath and can only be inspected by taking it off. A crack in the hose causes air suction, foam and overflow of fluid in reservoir. After replacing hose and pump the system must be bled of air using special bleeding procedure unlike most cars or else noise will occur and pump will fail. See hose # 8E0422887D. A vacuum adapter and a mighty vac pump may be required to remove air from the fluid and eliminate noise. Vacuum adapter # mva660 Pump must be bled using technical service bulletin # ZF PS PUMP BLEED

Pressure hose from Pump to Rack

This is the short elbow feed hose to the pump and it often cracks and creates foam in the hydraulic fluid, noise and damages the pump.