Steering

Before removing a steering part, refer to the vehicle manufacturers’ instructions. The replacement unit should be compared with the old core for compatibility. Also ensure that you have the correct tooling at hand, and that any previous fault codes stored in the ECU have been cleared. Any wiring and connectors that are related to the function of the part should also be checked prior to installation, to ensure correct operation.

For hydraulic power steering parts

Flush the system with clean fluid first!

The replacement unit is fully factory tested before dispatch. Many problems are caused by rubber residues from the old hydraulic hoses, which are subject to wear. They swell and become porous, thus releasing particles of rubber into the hydraulic system, which can be sticking and block up the fluid channels. Leaving dirty fluid in the vehicle system will contaminate the new part, which can lead to damage of the steering.
Check the vehicle manufacturers’ guidelines or the owner’s manual of the vehicle, to determine the correct hydraulic fluid for the application.

Flushing the system:

 

  1. Position the pressure line from the steering pump in a waste oil receptacle.
  2. Fill the power steering fluid reservoir to the full level with fresh fluid, start the engine and continue until clean fluid exits from the pressure line. The process can be sped up, by turning the steering wheel, lock to lock, several times. Remember to keep an eye on the fluid level as you do this, as running dry will damage the system.
  3. When the fluid comes out clean, the system may be drained and/or plugged.

 

Checking the power steering lines

As the hoses wear from the inside out, their condition cannot be assessed visually. If any hoses feel stiff, porous or hard, then replace all hoses, as they are all made from the same material and have been installed for the same length of time. If any hose is worn or defective, then it is likely that they all are.

Removal and installation

Having followed the above steps, the steering part can now be removed.
Please take care to plug the inlet and outlet hoses, to avoid unnecessary fluid spillage. Should any spillage happen onto the body of the part, please wipe it off at once.
Before installation of the new part, it is advisable to make a comparison of the old unit and the replacement unit, to ensure that you have compatibility.

Bleeding the system

 

  1. Ensure that all fittings and connections have been done up, according to the vehicle manufacturers’ specifications.
  2. Fill the fluid reservoir to the full level.
  3. Start the engine and let it run idle. Then turn the steering wheel, lock to lock, several times to bleed air from the system. This should be done with the wheels off the ground to avoid tyre scrub.
  4. Re-check the fluid level and top up if required. Never overfill the fluid reservoir, as this may damage the system.
  5. Please note: Some systems can be difficult to bleed, resulting in a rumbling noise. Check that all connections are air-tight by slowly loosening and re-tightening them. In severe cases, a vacuum pump can be required.

 

Product specific notes

For power steering racks:

 

  • The pressure port of the steering rack is marked with a red plug, and the return port with a yellow plug.
  • Sensor: If the rack is making use of a speed/flow sensor, the sensor must be removed from the old unit and reused. If this is not possible, a new sensor should be purchased from the vehicle manufacturer.
  • Alignment: Having completed the fitment and ensured functionality, the steering geometry should be set according the vehicle manufacturers’ specifications.

 

For electronic power steering racks:

 

  • Fault codes: Before installation, clear all fault codes with a diagnostics machine. Fault codes will always be present, if the steering rack is faulty. If no fault codes are present, then it is possible that your diagnostic machine is not suitable or a software update is needed.
  • Activation: After successful mechanical installation of the electronic steering rack, it is necessary to follow the set manufacturer guidelines for programming the vehicle characteristics curve. Vehicle specific features will also need to be enabled using a diagnostics machine.
  • Alignment: Having completed the fitment and ensured functionality, the steering geometry should be set according the vehicle manufacturers’ specifications.

 

For power steering pumps:

 

  • Not every power steering pump is supplied with a pulley. The exchange of the pulley from the old unit may therefore be required.
  • Recommendation: Removal of the pulley should only be attempted using the correct tools, as damage could otherwise occur.
  • Fitting instruction: To avoid internal pump damage when replacing the pulley, do not hammer or press the pulley into place – it should be pulled into the correct position using a special tool, which avoids short or strain on the internal components.
  • Belt tension: If applicable, please ensure that the belt tension is within the vehicle manufacturers’ specifications.
  • Sensor: If the pump is making use of a speed/flow sensor, the sensor must be removed from the old unit and reused. If this is not possible, a new sensor should be purchased from the vehicle manufacturer.

 

For electronic hydraulic pumps:

  • Ensure that any applicable VIN code and/or ECU code is matching what has previously been fitted to the vehicle. If a mismatch occurs, the new pump unit may be inoperative.
  • Any wiring or connectors in relation to the function of the pump should be checked, to ensure correct operation of the new unit.

For columns:

  • Fault codes: Before installation, clear all fault codes with a diagnostics machine. Fault codes will always be present, if the steering column is faulty. If no fault codes are present, then it is possible that your diagnostic machine is not suitable or a software update is needed.
  • Battery: Make sure that there is at least a 20-minute interval between disconnecting and re-connecting the battery in the installation process.
  • Warning lights: No warning lights should be illuminated on the dashboard display. If warning lights are present, it is necessary to check the ECU with a diagnostic machine or contact your supplier for instruction.

Flushing the system

The DRI brand is a part of the BORG Automotive Group – One of Europe’s leading remanufacturers of auto parts.

BORG Automotive A/S Bergsoesvej 12 8600 Silkeborg Denmark Tel. +45 8680 1177 info@dk.borgautomotive.com