The M20120-A Injector Setting Fixture is a precision-engineered calibration tool designed for accurate injector height and timing adjustment on Cummins NT, N14, L10, and M11 engine platforms. Proper injector setting is critical in mechanical and electronic Cummins fuel systems, ensuring correct fuel delivery, smooth combustion, reduced emissions, and optimal engine performance.
This fixture provides technicians with a stable, repeatable reference point to set injector plunger travel and injector height to OEM specifications. In engines like the N14 and M11—where fuel system accuracy directly impacts power output, cold-start behavior, and cylinder balance—this tool helps prevent over-fueling, misfire conditions, excessive smoke, and premature injector wear.
Built for heavy-duty shop environments, the M20120-A is essential for in-frame adjustments, full engine overhauls, and routine tune-ups on commercial truck fleets, construction equipment, buses, and industrial power units running Cummins mid- and big-cam designs.
Key Features & Benefits
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Designed for Cummins NT, N14, L10, and M11 diesel engines.
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Provides accurate, repeatable injector height and timing adjustment.
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Ensures proper injector travel, improving combustion efficiency and power output.
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Helps prevent excessive fuel consumption, hard starts, and injector failure due to improper settings.
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Rugged shop-grade construction suitable for rebuilders, dealerships, and fleet maintenance facilities.
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Essential tool for injector replacement, valve set procedures, and major engine service.
Applications
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Cummins NT Series
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Cummins N14
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Cummins L10
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Cummins M11 / ISM (mechanical-style injector setting)
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Fleet maintenance, engine rebuild shops, vocational truck service centers
