Here is a detailed breakdown of the Bosch Exchange Diesel Fuel Pump 0 986 437 342 and its application for the DAF CF with a 6.7L engine.
This information is useful if you are a mechanic, a parts dealer, or a truck owner looking to verify compatibility or understand what you are purchasing.
1. Product Identification
Part Number: 0 986 437 342 (often written without spaces: 0986437342)
Brand: Bosch
Type: Exchange Diesel Fuel Pump
Product Line: Bosch Diesel Exchange (DEX)
2. Vehicle Application
This specific pump is engineered for DAF Trucks equipped with the PACCAR PX-6 engine (marketed by DAF as the CF 6.7).
Model: DAF CF Series (CF65, CF75, CF85 ranges that utilize the 6.7L engine)
Engine: 6.7-liter PACCAR Engine (FR, GR, and similar variants).
Emission Standard: This pump is typically associated with Euro 5 and EEV (Enhanced Environmentally friendly Vehicle) emission standards. It may also be found on some early Euro 6 variants, but the Euro 5 application is the most common for this specific part number.
3.Technical Features
This is a High-Pressure Common Rail Pump.
Type: CP4 (likely a CP4.2 variant, which is common for medium-duty applications like the 6.7L).
Function: It generates the high pressure (up to 1,800 bar or more) required for the common rail fuel injection system.
Lubrication: It relies on diesel fuel for lubrication. This makes fuel quality and water separation critical for the longevity of this pump.
Summary Checklist for Purchase
Confirm Engine: Ensure your truck has the 6.7L PACCAR (DAF) engine.
Check OEM Number: Look at your old pump or your service records for the DAF part number.
Core Return: Be prepared to pay a core charge and return your old pump to avoid core charges.
Installation: When replacing a CP4 pump, it is highly recommended to:
Check the fuel system for contamination (metal debris).
Replace the fuel filter(s).
Prime the system correctly before starting to avoid damage.
