Genuine VOLVO High‑Pressure Fuel Injection Pump Assembly — Common Rail Main Pressurization Core Solution

The Genuine VOLVO Premium Heavy‑Duty High‑Pressure Fuel Injection Pump Assembly (Part Numbers: 21147446 / VOE 21147446 / 20798675), also known as Common Rail Injection Pump Core, is the heart of VOLVO B‑series, C‑series, D‑series & E‑series diesel fuel systems. Gear‑driven by engine timing gear train, it pressurizes low‑pressure fuel from feed pump (22905123) for delivery to fuel injectors (20798114). Integrated electronic metering valve communicates with E‑ECU for precise fuel output adjustment. Replacing worn pumps resolves hot‑start failure, load‑induced rail‑pressure drop and power lag, restoring original digging torque performance.

Core Technical Advantages

• DLC Diamond‑Like Carbon Hardened Internal Components: Anti‑friction coated plungers and tappets resist high‑pressure wear from low‑lubricity fuels.

• Precision Electronic Fuel Metering Valve: Real‑time fuel‑flow regulation minimizes bypass loss, reduces return‑line temperature and improves fuel economy.

• One‑Piece Forged Steel Monoblock Housing: High‑density alloy casing withstands extreme pressure cycles and thermal shocks without micro‑cracking.

• High‑Tolerance Tapered Drive Hub: Precise gear‑train meshing eliminates backlash chatter and stabilizes injection timing accuracy.

Technical Specifications

Master Application Fleet Guide

This high‑pressure fuel pump fits VOLVO excavators, wheeled excavators, wheel loaders and road‑building machinery:

• Crawler & Wheeled Excavators: EC140C/D, EC160D, EC200B/E, EC210B, EC220D/E, EW140D, EW205D

• Wheel Loaders: L45G, L60F, L90H

• Road Construction Equipment: SD115/SD135B/SD160B Compactors, DD120C Asphalt Rollers

Critical B2B Procurement & Maintenance Guidelines

B2B Procurement Strategy

Water contamination, abrasive particles and long‑hour fatigue cause plunger scoring, rail‑pressure instability and hot‑start failure. Stock 21147446/20798675 for high‑priority engine breakdown orders. Cross‑sell with injectors (20798114), feed pumps (22905123) and premium fuel filters for complete fuel‑system overhaul kits.

Common Failure Symptoms

• Hot‑engine no‑start condition from worn plungers unable to build required rail pressure

• Power lag & engine stalling under heavy load with low‑rail‑pressure DTC codes displayed on monitor (14609502)

• Abnormal whining/grinding noise from timing‑gear area caused by failed internal bearings or scoring components

Global Brand Cross‑Reference Matrix

All manufacturer names and model designations are for compatibility reference only. These genuine high‑pressure fuel injection pumps deliver stable common‑rail pressure for global VOLVO construction, quarry, mining and road‑building machinery fleets.