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Common Rail Injector Stage 3 Repair Stroke Measuring Tool Kit
The CRM900/CRM920 series is a high-precision diagnostic and measurement system designed specifically for the Stage 3 repair of common rail injectors. This system allows technicians to accurately measure critical internal dimensions, including Armature Lift (via electromagnetic drive or pressing method), Needle Valve Lift, and Air Clearance. By integrating a high-sensitivity dial gauge with an intelligent controller, the CRM920 provides real-time adjustment suggestions, calculating the exact thickness of shims required to restore the injector to factory specifications. It is an essential tool for professional diesel workshops specializing in Bosch, Denso, and Delphi injector reconditioning.








Dual Measurement Methods: Supports both the Electromagnetic Drive Method (for real-time dynamic simulation) and the traditional Pressing Method to ensure measurement versatility.
Smart Adjustment Guidance: The system automatically prompts the user to adjust specific gasket thicknesses and provides the exact adjustment amount if results are out of range.
High Precision Components: Equipped with a professional dial gauge, specialized measuring needles (1.5mm diameter), and robust measuring brackets for micron-level accuracy.
Comprehensive Test Coverage: Capable of measuring Armature Lift, Over Lift (Buffer Lift), Needle Valve Stroke, and Air Gap, covering all critical Stage 3 repair steps.
Integrated Controller: The dedicated controller manages the electromagnetic pulse to simulate injector firing, allowing for consistent and repeatable armature lift readings.
Wide Compatibility: Includes various fixtures and measuring sleeves specifically designed for Bosch 110, 120 series, and other mainstream common rail injectors.
| Technical Parameter | Specifications (CRM900 / CRM920C) |
|---|---|
| Primary Function | Common Rail Injector Internal Stroke Measurement (Stage 3) |
| Measurement Items | Armature Lift, Needle Lift, Air Gap, Over Lift |
| Drive Mode | Electromagnetic Drive & Manual Pressing |
| Supported Injectors | Bosch 110, 120, Denso, and other CR Injectors |
| Display Unit | High Precision Digital Dial Gauge (0.001mm) |
| Measuring Needle | Diameter 1.5mm, Length 50mm (Customizable) |
| Adjustment Aid | Auto-calculation of Shim Thickness Adjustment |
| Components | Controller, Measuring Bracket, Dial Gauge, Fixtures, Cables |



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