GE LM2500 Gas Turbine Parts: Complete Reference Guide for Maintenance & Procurement

Introduction to the GE LM2500 Gas Turbine

The GE LM2500 is one of the most widely deployed aeroderivative gas turbines in the world, with over 2,500 units operating across marine propulsion, oil and gas, and power generation applications in more than 60 countries. Originally derived from the GE CF6 aircraft engine, the LM2500 delivers between 25,000 and 33,600 horsepower depending on the variant (LM2500, LM2500+, LM2500+G4), making it the workhorse of the industrial gas turbine fleet.

For maintenance planners, procurement specialists, and plant operators, having a comprehensive understanding of LM2500 spare parts is essential for minimizing downtime and controlling maintenance costs. This guide covers every major component category, key part numbers, and practical sourcing strategies based on our inventory of over 6,300 LM2500-specific parts.

LM2500 Engine Architecture Overview

The LM2500 gas turbine consists of several major modules that work together to convert fuel energy into mechanical power. Understanding this architecture is critical for identifying which parts you need during planned maintenance events or unscheduled repairs.

The engine is built around a 16-stage axial compressor that delivers a pressure ratio of approximately 18:1, a single annular combustion system with 30 fuel nozzles, and a 2-stage high-pressure turbine (HPT) that drives the compressor. The power turbine section, which converts remaining gas energy into useful shaft power, is a 6-stage low-pressure turbine (LPT) in most configurations.

Compressor Section Parts

The compressor section is responsible for pressurizing incoming air before it enters the combustion chamber. Key components include rotor blades, stator vanes, and the variable stator vane (VSV) actuation system that optimizes airflow at different operating conditions.

Part Number	Description	Application
1333M63G01	Actuator, Variable Stator Vane	LM2500 VSV System
1333M63G03	Actuator, Variable Stator Vane (Alt)	LM2500 VSV System
1333M61P01	Bushing, Actuator	LM2500 Compressor
1333M62P01	Bushing, Actuator	LM2500 Compressor
9103M83P01	Clip, Filter Screen	LM2500 Compressor Inlet

The variable stator vane system is particularly important because it controls the angle of stator vanes in the front stages of the compressor, preventing compressor surge during startup and part-load operation. Actuator bearings (such as 1327M98P01 and 1327M98P04) are common replacement items during hot gas path inspections.

Combustion System Components

The LM2500 uses a single annular combustion chamber (SAC) design, which is more compact and efficient than can-annular designs found in heavy-duty frame turbines. The combustion section contains some of the most frequently replaced parts due to the extreme temperatures involved — exceeding 1,200°C in the primary combustion zone.

Part Number	Description	Replacement Interval
1808M63P03	Tube, Combustion Cup	Every HGP Inspection
3041M99P01	Retainer, Igniter — Combustion Chamber Dome	As needed
3042M10P01	Sleeve, Combustion Chamber Dome	Every Major Overhaul
1030M59P01	Gasket, Metal O-Ring Seal (4 Locations)	Every disassembly
1030M59P02	Gasket, Metal O-Ring Seal	Every disassembly

Fuel nozzles are among the most critical combustion components. The LM2500 uses 30 individual fuel nozzles arranged in a circular pattern around the combustion chamber dome. These nozzles must atomize fuel precisely to ensure even flame distribution and prevent hot spots that can damage downstream turbine components. Fuel nozzle replacement or refurbishment is typically required every 25,000 to 50,000 operating hours, depending on fuel quality and operating profile.

Hot Gas Path (HGP) Components

The hot gas path includes all components exposed to the high-temperature combustion gases as they flow from the combustion chamber through the turbine stages. These are the highest-value parts in the engine and represent the largest portion of maintenance costs.

Part Number	Description	Section
1347M95G01	Shroud, HPT Stator — Stage 1	High Pressure Turbine
1347M95G02	Shroud, HPT Stator	High Pressure Turbine
1347M95G05	Shroud Assembly, HPTS Stage 1 Alt FG	High Pressure Turbine
1347M95G09	Shroud Assembly, HPT Stage 2	High Pressure Turbine
2083M50G01	Liner, Turbine Mid Frame (Field)	Turbine Mid Frame
3040M37G01	Beam, TMF Liner	Turbine Mid Frame

The HPT Stage 1 and Stage 2 shrouds are critical sealing components that maintain the gap between the rotating blade tips and the stationary casing. Excessive clearance due to shroud wear reduces turbine efficiency and power output. During a hot gas path inspection (HGPI), these shrouds are always inspected and often replaced.

The turbine mid frame (TMF) is the structural component that supports the bearings between the high-pressure and low-pressure turbine sections. TMF liners (2083M50G01) protect the structural frame from hot gas exposure and are replaced during major overhauls.

Bearing and Seal Components

The LM2500 uses a combination of ball bearings and roller bearings to support the rotating shafts. These bearings operate under extreme conditions — high speeds, high temperatures, and significant axial and radial loads. Proper bearing maintenance is essential for preventing catastrophic engine failure.

Part Number	Description	Location
1030M59P01	Gasket, Metal O-Ring Seal (4 Locations)	Multiple bearing locations
1030M59P02	Gasket, Metal O-Ring Seal	Bearing housing
1327M74P01	Spacer, Seal, Bearing	No. 5 Bearing area

Metal O-ring seals are single-use components that must be replaced every time a bearing housing is opened for inspection. Keeping an adequate stock of these relatively inexpensive seals prevents delays during maintenance events.

Starting and Auxiliary Systems

The LM2500 can be equipped with either pneumatic or hydraulic starting systems, depending on the installation. The starting system must accelerate the gas generator rotor to self-sustaining speed (approximately 60% of rated speed) within a specified time window.

Part Number	Description	Type
0537L111G01	Starter, Pneumatic — Assembly and Installation	Pneumatic Start
0537L316G01	Starter, Hydraulic — Assembly and Installation	Hydraulic Start
0682L476G01	Hilliard Continuous Lube Starter	Continuous Lube

Fuel System Components

The fuel system delivers precisely metered fuel to the combustion chamber through a network of manifolds, filters, valves, and nozzles. For dual-fuel installations (gas and liquid), the fuel system complexity increases significantly with additional piping, valves, and control components.

Part Number	Description	Function
9015M81P04	Filter, Fuel	Fuel filtration
9154M98P03	Filter, Fuel	Fuel filtration (LM2500/LM6000)
9011M60P01	Gasket, Fuel Filter	Filter housing seal
AD9227-1640	Fuel Filter	Fuel filtration

Instrumentation and Sensors

Modern LM2500 installations rely on extensive instrumentation to monitor engine health and optimize performance. Temperature sensors, pressure transducers, and speed sensors provide real-time data to the control system.

Part Number	Description	Measurement
537L164G01	Kit, CIT Sensor (Optional Equipment)	Compressor Inlet Temperature
537L322G01	Kit, Oil Temperature Sensor	Lube Oil Temperature
537L322G02	Kit, Oil Temperature Sensor (Alt)	Lube Oil Temperature

Temperature sensors are particularly critical because the control system uses exhaust gas temperature (EGT) readings to manage fuel flow and protect the turbine from over-temperature conditions. A faulty thermocouple can cause the control system to either limit power output unnecessarily or, worse, allow the turbine to operate at damaging temperatures.

LM2500 Maintenance Intervals

Understanding the standard maintenance intervals helps procurement teams plan parts purchases well in advance. The three main maintenance events for the LM2500 are:

Maintenance Event	Typical Interval	Key Parts Required
Borescope Inspection (BSI)	Every 5,000-8,000 hours	Borescope equipment, gaskets, O-rings
Hot Gas Path Inspection (HGPI)	Every 25,000 hours	Shrouds, seals, combustion hardware, fuel nozzles
Major Overhaul (MO)	Every 50,000 hours	Complete hot section, bearings, blades, vanes, seals

These intervals can vary significantly based on operating conditions. Turbines running on liquid fuel, operating in harsh environments (high ambient temperature, dusty or salty air), or frequently cycling between start and stop will require more frequent maintenance.

Sourcing LM2500 Parts: What to Consider

When sourcing LM2500 spare parts, operators face a choice between OEM parts from GE Vernova, licensed aftermarket manufacturers, and surplus parts from decommissioned engines. Each option has trade-offs in terms of cost, lead time, and quality assurance.

OEM parts come with full traceability and warranty but typically have the longest lead times (12-26 weeks for many components) and highest prices. Aftermarket parts from licensed manufacturers like Chromalloy, HEICO, or Linamar can offer 20-40% cost savings with comparable quality. Surplus parts from brokers and distributors like BDB Turbine Parts can provide immediate availability at competitive prices, which is especially valuable for unplanned maintenance events.

At BDB Turbine Parts, we maintain an inventory of over 6,300 LM2500-specific part numbers, with additional cross-references to LM6000 and LMS100 components that share common hardware. Contact our team for availability and pricing on any LM2500 component, or browse our LM2500 parts catalog online.

Conclusion

The GE LM2500 remains the backbone of the aeroderivative gas turbine fleet worldwide. Whether you are planning a routine hot gas path inspection or responding to an unscheduled maintenance event, having access to the right parts at the right time is critical for minimizing downtime and controlling costs. This guide provides a starting point for understanding the major component categories and key part numbers, but every installation has unique requirements based on its configuration, operating history, and maintenance philosophy.

For personalized assistance with LM2500 parts sourcing, submit a quote request or contact our technical team directly. We serve operators, maintenance companies, and brokers in over 75 countries worldwide.