Description
Injection Pump Gear For 1.4 HDI And 1.6 HDI Engines For Citroën And Peugeot Vehicles.
High-quality injection pump gear designed for 1.4 HDI and 1.6 HDI diesel engines used in Citroën and Peugeot models. This replacement gear restores precise rotary drive to the fuel injection pump, ensuring correct fuel timing and stable engine performance. Supplied to match original equipment dimensions and fitment, it is a common spare part referenced by OE numbers and aftermarket codes for fast identification by technicians and DIY enthusiasts.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: 1.4 HDI, 1.6 HDI
- Product Codes: 9636947780, 193040
- Additional Numbers: 193040 | 9636947780
Fitment
Compatible with a range of Citroën and Peugeot models fitted with 1.4 HDI and 1.6 HDI engines, for example:
Function
The injection pump gear transfers drive from the engine timing system to the high-pressure fuel injection pump. It ensures the pump shaft rotates in precise phase with the engine crankshaft, maintaining correct injection timing for efficient combustion, smooth idling and proper power delivery.
Replacement Guide
Typical replacement steps for professionals and experienced DIY mechanics:
- Prepare the vehicle: secure the car, disconnect any necessary components to access the injection pump area and relieve fuel system pressure according to workshop procedures.
- Set engine to Top Dead Center (TDC) on cylinder 1 and mark timing reference points on the crankshaft and pump gear.
- Loosen and remove the old gear from the pump shaft, inspect shaft and keyway for wear or damage.
- Install the new gear aligning timing marks precisely; tighten to the manufacturer’s specified torque where applicable.
- Reassemble timing components, verify belt/chain tension and rotate the engine by hand at least two full revolutions to confirm correct timing and no interference.
- Prime the fuel system, start the engine and check for leaks and correct idle. Road test to confirm restored performance.
Installation Recommendations
- Follow the vehicle manufacturer’s service manual for timing and torque specifications.
- Use proper timing alignment tools and, if applicable, replace related wear items (timing belt, tensioner, seals) while the system is accessible.
- Inspect the injection pump shaft and keyway; replace or repair any damaged components before fitting the new gear.
- Prime and bleed the fuel system carefully to avoid air ingress into the injection pump and high-pressure circuit.
- If unsure about timing or alignment, have the work performed by a qualified technician with appropriate tools and experience.
Most Common Failure Causes
Failure of the injection pump gear is typically caused by mechanical wear, tooth damage or incorrect installation. Common triggers include:
- Torque or shear forces from timing belt jump or sudden engine load changes that damage gear teeth.
- Wear from long-term operation, contamination or insufficient lubrication at the pump interface.
- Corrosion or material fatigue in older components.
- Improper installation or incorrect alignment leading to accelerated wear or slippage.
Replacing a worn or damaged gear restores accurate injection timing and can prevent secondary damage to the pump and engine. When replacing this part, always verify surrounding components and follow correct timing procedures to ensure a lasting repair.
