The ATCL‑TU‑15‑49 TU-15-49 Compression Adapter is a precision diesel engine service tool designed to be used with a ATC4451 or equivalent diesel compression tester to accurately measure cylinder compression on a wide range of Caterpillar heavy-duty engines. This adapter provides a secure, leak-free connection between the tester and the engine’s injector port or compression test port, enabling reliable compression readings without removing additional engine components.
Built for professional diesel technicians, engine rebuilders, and fleet maintenance shops, the TU-15-49 adapter is compatible with several popular CAT platforms, including 3406E, C13, C15, C16, C18, and C27 engines.
Whether you’re performing preventive maintenance, troubleshooting misfires, or verifying engine condition before rebuilds, this compression adapter helps technicians get fast, accurate cylinder pressure readings — a cornerstone of professional diesel engine diagnostics.
Key Features & Benefits
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Compatible with major Caterpillar diesel engines including 3406E, C13, C15, C16, C18, and C27.
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Designed for use with ATC4451 diesel compression testers and other gauges with standard Foster style fitting
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Provides secure, leak-free connection for reliable compression readings.
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Ideal for preventive maintenance, misfire diagnosis, engine performance checks, and pre-rebuild testing.
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Durable construction suited for heavy-duty professional shop environments.
