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Home >> BMW >> 2015 >> 528i >> Repair and Diagnosis (Single Page) >> General Information >> OEM General Information >> Functional Description - F10 - HVAC System, Steering System, Restraints System >> Steering System - Functional Description >> Vertical dynamics management (VDM) >> Tandem pump

Tandem pump

Depending on the engine version and equipment specification, the fitted tandem pumps are flanged onto the engine. The tandem pump supplies the hydraulic circuits for both Dynamic Drive and the power steering. The pump consists of a radial piston for the Dynamic Drive System and a vane-pump section for the power steering. Dynamic Drive and the power steering share a common fluid cooler and fluid reservoir.

Fig 1: Identifying Radial Piston Section Of Tandem Pump
G09873106Courtesy of BMW OF NORTH AMERICA, INC.
Item Explanation
1 Radial piston section of the tandem pump
2 Vane cell section of the tandem pump