Genuine VOLVO High‑Pressure Fuel Pipe Line Assembly — Common‑Rail Injection Supply Line Solution

The Genuine VOLVO Premium Heavy‑Duty High‑Pressure Fuel Pipe Line Assembly (Part Numbers: 21364330 / VOE 21364330 / 21120425), also known as High‑Pressure Injection Supply Line, is a severe‑duty powertrain component for VOLVO high‑capacity electronic diesel engines. This thick‑walled seamless steel tube transfers pressurized fuel from the high‑pressure injection pump to the common‑rail manifold or unit injectors, withstanding thousands‑bar pressure pulses. Replacing bent, cracked or damaged fuel lines prevents high‑pressure diesel leakage, engine stalling, unstable fuel atomization and fire risks.

Core Technical Advantages

• Cold‑Drawn Seamless High‑Tensile Steel: Uniform‑density structural alloy resists expansion and fatigue cracking under extreme pressure spikes.

• Precision‑Machined Inverted Cone Fittings: Hardened metal‑to‑metal seats deliver leak‑proof sealing at pump, rail and injector ports.

• Zinc‑Passivated Anti‑Corrosion Treatment: Inner‑outer coating resists rust, biodiesel additives and high‑temperature scaling degradation.

• CNC‑Mandrel‑Bent Vibration‑Resistant Geometry: Smooth inner bore eliminates flow turbulence and matches OEM routing to avoid chafing wear.

Technical Specifications

Master Application Fleet Guide

This high‑pressure fuel line fits VOLVO excavators, wheel loaders, motor graders, pavers and pipelayers:

• Crawler Excavators: EC240B, EC250D, EC290B, EC300D

• Wheel Loaders: L105, L110E

• Road‑Building Machinery: G960/G990 Graders, P8820D/ABG8820 Pavers

• Special Machinery: PL3005D Pipelayers

Critical B2B Procurement & Maintenance Guidelines

B2B Procurement Strategy

High‑pressure fuel lines are single‑use components; re‑use causes cone‑seat deformation and leakage failure. Stock 21364330/21120425 for fuel‑system overhaul kits. Cross‑sell with high‑pressure pumps, rail pressure sensors, fuel separators and injectors (20798114).

Common Failure Symptoms

• Diesel mist/weeping at connections from scratched, pitted or crushed inverted cone seats

• Power loss + rail‑pressure fault codes on monitor (14609502) caused by hairline‑crack pressure leakage

• Hard starting or immediate stalling from insufficient starting rail pressure due to line integrity failure

Global Brand Cross‑Reference Matrix

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