TRW Automotive EV Series Power Steering Pump Service Manual

The TRW Automotive EV Series Power Steering Pump is a crucial component in the vehicle's power steering system. It is a balanced, positive displacement, sliding vane type, two line pump with an internal pilot operated flow control and relief valve.

The balanced design of the pumping element ensures that the internal forces due to the pressure generated by the pumping action are evenly distributed. This is achieved through the presence of two pumping pockets opposed 180° from each other.

Being a positive displacement pump, the EV Series Power Steering Pump delivers a fixed volume for each revolution of the input shaft, determined by the internal contour of the cam ring.

The sliding vane type pumping element consists of three components: the rotor, the vanes, and the cam ring. The rotor, driven by the engine with the pump input shaft, holds the vanes. These vanes slide back and forth in slots in the rotor while following the internal contour of the cam ring, hence the designation as a sliding vane type pump.

The service manual for the TRW Automotive EV Series Power Steering Pump includes the following sections:

• Section 1 General Information
  • Introduction
  • General Design & Operation
  • Torque Chart
  • Specification Numbers
  • Part Number Breakdown
  • Service Parts List
  • Exploded View
  • Oil Flow Illustration
  • Approved Hydraulic Fluids
• Section 2 Installation
  • Installation Procedures
  • Maintenance Tips
• Section 3 Reseal & Repair
  • Disassembly Preparation
  • Disassembly Inspection
  • Assembly Preparation/Assembly
• Section 4 Reinstallation
  • Reinstallation

The TRW Automotive EV Series Power Steering Pump service manual is a valuable resource for both professional mechanics and DIY enthusiasts, providing comprehensive information for maintenance, repair, and reinstallation of the power steering pump.