This is very likely an internal assembly number, a sub-assembly number, or a casting number.
Its purpose is for precise identification during manufacturing or service. It might refer to the specific pump housing or core assembly within the complete 0414673999 unit.
Here are the key structural advantages of this individual plunger pump design:
1. Robustness and Simplicity
Fewer Moving Parts per Unit: Each cylinder is served by its own dedicated plunger and barrel assembly. This is a simple, time-tested, and incredibly strong mechanical principle.
Massive Construction: The pumps are built with heavy-duty materials to withstand the high internal pressures (over 1,000 bar/14,500 psi in later models) and the mechanical stresses of a direct-injection diesel engine.
Durability: This simplicity translates to exceptional longevity and reliability, a hallmark of Deutz engines in agricultural and industrial applications.
2. Perfect Compatibility with Air-Cooling
Independent Function: Each pump element feeds one cylinder. This decentralized design is inherently less susceptible to heat soak, a critical factor for air-cooled engines which can have greater thermal variance across the cylinder bank than water-cooled engines.
Consistent Delivery: Even if one part of the engine runs slightly hotter, the fuel delivery for that specific cylinder remains largely unaffected because its pump is a self-contained unit.
3. Superior Serviceability and Calibration
Individual Adjustment: Each pump element can be calibrated independently. This means a mechanic can fine-tune the exact fuel quantity delivered to each cylinder to ensure perfect balance. This is crucial for smooth engine operation, optimal power, and minimizing smoke.
Component-Level Repair: If one plunger/barrel pair wears out or is damaged, it is often possible to replace just that individual element ("pump and barrel set") rather than the entire pump assembly, which is a significant cost-saving advantage.
4. Excellent Controllability and Performance
Direct Mechanical Link: The plunger is driven directly by the engine's camshaft via a tappet. This provides precise, hardwired control over injection timing.
Helix-Controlled Metering: The fuel quantity is metered by rotating the plunger. A machined helix (spiral groove) on the plunger aligns with a spill port in the barrel. This is a highly accurate and mechanically governed system, excellent for engines that need to maintain a steady speed under varying load (like a tractor operating a PTO-driven implement).
5. Design Integration (A Key Deutz Advantage)
Compact, Engine-Integrated Housing: Deutz typically mounts a multi-cylinder pump block directly onto the engine crankcase. The camshaft that operates the valves also has dedicated lobes to operate the injection pump tappets.
Advantages of Integration:
