Description
Power steering pump, pump for Citroën C5 I and II
Type: Hydraulic pump
Pressure (bar): 110
Flow (l/min): 7
Pulley: Yes, d=126 mm, 6 grooves
This hydraulic power steering pump is a direct-fit solution for Citroën C5 first and second generation models, designed to restore firm, predictable steering assist and reduce steering effort at low speeds. Built to meet the demands of professional workshops and DIY mechanics, the unit delivers up to 110 bar operating pressure with a flow rate of approximately 7 l/min. The pump is belt-driven and supplied with a 126 mm diameter pulley with six grooves, matching original drive configurations for easy replacement.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C5 I, Citroën C5 II
- Product Codes: 9636086680, 9632876780, 9633817680, 9640906480, 9640830987
- Additional Numbers: 40077A, 4007X9
- Type: Hydraulic Power Steering Pump
- Pressure: 110 bar
- Flow: 7 l/min
- Pulley: 126 mm Diameter, 6 Grooves
Installation Recommendations
Follow these steps to ensure a reliable replacement and long service life:
- Disconnect The Battery Before Starting Work To Prevent Electrical Damage.
- Relieve System Pressure And Catch Any Spilled Fluid Safely.
- Remove The Drive Belt And Any Obstructing Components To Gain Access To The Pump.
- Drain Or Contain Power Steering Fluid Before Disconnecting Hoses To Minimize Contamination.
- Unbolt The Pump From The Mounting Bracket. Transfer Pulley, Bracket, Or Sensors If Required By The Vehicle Design.
- Fit The Replacement Pump Using Correct Fastener Torque Values From The Manufacturer Where Available.
- Refill With Manufacturer-Recommended Hydraulic/Power Steering Fluid And Bleed The System By Turning The Steering Wheel Lock-To-Lock With The Engine Running Until Air Is Purged.
- Check For Leaks, Recheck Belt Tension, And Confirm Smooth Operation Under Load.
Why The Part Most Commonly Fails
- Fluid Contamination Or Degradation Leading To Accelerated Internal Wear.
- Seal Or O-Ring Failure Resulting In External Leaks And Loss Of Pressure.
- Worn Bearings Causing Noise, Reduced Pump Efficiency, Or Mechanical Seizure.
- Damaged Or Slipping Drive Belt Causing Underdrive And Poor Assist.
- Air Ingress Or Blocked Lines Leading To Intermittent Assistance And Noise.
- Excessive Heat Or Overloading That Shortens Component Life.
Fitment Tips And Additional Notes
Part numbers listed in the technical information are commonly used when searching for compatible units—mechanics frequently look up this pump by those codes. When replacing the pump, always inspect related components such as hoses, clamps, belt tensioner, and reservoir for wear or contamination. Replacing contaminated fluid and flushing the system can prevent premature failure of the new pump.
Who This Product Is For
Designed For Professional Garages And Experienced DIY Mechanics Working On Citroën C5 I And II Vehicles. Ideal For Repairs Where The Original Hydraulic Power Steering Pump Has Developed Leaks, Excessive Noise, Or Loss Of Assist.
