Mercedes-Benz OM502LA Engine Assembly for XCMG and Zoomlion Cranes

The OM502LA diesel engine assembly is used in selected heavy crane applications, including configurations from XCMG and Zoomlion. An engine family name does not define every installed variant, so the engine serial number, arrangement and machine data must be confirmed before quotation.

Define the Required Supply Scope

• Complete engine, long block or base engine

• Fuel-system equipment and injectors

• Turbocharger, exhaust manifolds and intake parts

• Starter, alternator and electrical accessories

• ECU, wiring harness and sensors

• Cooling fan, brackets, flywheel housing and mounting parts

• Emissions-related equipment where applicable

Identification Documents

Send clear photos of the engine nameplate, full engine serial number and every arrangement or specification code. Include the crane model and machine serial number, ECU references, flywheel-housing view, mounting points and both sides of the installed engine. State which accessories must be included; the phrase “engine assembly” can represent different supply scopes.

Why Variant Confirmation Is Essential

Engines within the OM502LA family can differ in calibration, accessories, wiring, cooling layout, exhaust equipment and installation hardware. We do not assume output rating, emissions level or direct interchangeability from the family name alone. The confirmed quotation should list included accessories and any items reused from the original engine.

Pre-Installation Checks

Before replacement, inspect the cooling, fuel, intake, exhaust and electrical systems for conditions that may have contributed to the original failure. Flush or clean connected systems as required by the applicable service information. ECU compatibility and commissioning should be handled by qualified personnel.

Export Preparation

Open ports are capped, fluids are handled according to shipping requirements and exposed machined surfaces receive corrosion protection. The engine is secured to a reinforced base with protective wrapping and shock-resistant bracing. The package identifies the confirmed engine reference and included accessory scope.

Frequently Asked Questions

Is every OM502LA engine directly interchangeable?

No. Serial number, calibration, accessories, mounting, electronics and emissions configuration must be compared.

What does “engine assembly” include?

The included scope varies. The quotation must state whether the ECU, turbocharger, starter, alternator, harness and other accessories are included.

Which numbers are most important?

The engine serial and arrangement information, machine serial number and ECU references provide the strongest identification basis.