The M10222 Injector Sleeve Remover & Installer is a professional-grade engine service tool designed for precision removal and installation of injector sleeves (injector cups) on heavy-duty Caterpillar 3406E, C12, and C15 diesel engines. It is a direct replacement for the OEM Cat part number 9U-6891, providing technicians with a reliable tool set to disassemble and reinstall injector sleeves during top-end engine service, rebuilds, and maintenance procedures.
Injector sleeves are critical sealing and alignment components that house fuel injectors and help maintain proper combustion chamber seating. Over time or during service, sleeves can become worn, corroded, or seized, making them difficult to remove without specialized tooling. The M10222 kit simplifies this process with precision guides and drivers that remove old sleeves and install new ones straight, true, and without damaging the cylinder head bore — preventing costly remachining or head replacement.
Key Features & Benefits
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OEM-Equivalent Fit: Engineered to match the form and function of Caterpillar 9U-6891 injector sleeve tool, ensuring proper engagement and performance.
- Dual Purpose: Designed for both removal and installation of injector sleeves, helping streamline service workflows
- Precision Guides: Includes guide components that align the tool with the injector bore, minimizing the risk of bore damage or misalignment during service.
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Professional-Grade Construction: Durable materials built to withstand repeated use in diesel engine repair shops, fleet maintenance facilities, and rebuild operations.
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Time-Saving: Helps reduce labor time and effort compared to improvised or generic puller methods.
Typical Applications
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Removal of corroded or seized injector sleeves on Caterpillar 3406E, C12, and C15 engines.
- Installation of new injector sleeves in preparation for fuel injector servicing.
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Heavy-duty diesel rebuilds, overhauls, and preventive maintenance tasks.
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Ideal for diesel engine service departments, rebuild shops, and professional mechanics.
Why It Matters
Injector sleeves form a critical seal between the fuel injector and the cylinder head, helping maintain combustion integrity and prevent combustion gas blow-by or coolant contamination. Using the correct sleeve remover/installer tool like the M10222 ensures clean removal and precise installation of sleeves, which protects the cylinder head’s precision bores and supports long-term engine performance. Misaligned or damaged sleeves can lead to poor engine performance, oil contamination, and increased maintenance costs — problems this dedicated tool helps prevent.
