HD-3535 E320D Revolution Speed Sensor 238-0120 for Caterpillar Engine Parts

Product Details

Product Overview

This HD-3535 Revolution Speed Sensor, identified by OEM cross-reference number 238-0120, is a critical electronic component specifically designed for the Caterpillar E320D excavator engine platform. As a precision engine management part, this sensor monitors the rotational speed of the engine’s crankshaft or camshaft, providing essential data to the Engine Control Unit (ECU) for optimal fuel injection timing, idle control, and overall engine performance.

Manufactured under the brand, this sensor is built to meet original equipment (OEM) size and fitment specifications. It is suitable for a wide range of heavy machinery applications beyond excavators, including forklifts, bulldozers, buses, trucks, and loaders that utilize the Caterpillar diesel engine architecture. This part is an ideal replacement for failed or failing speed sensors, helping to restore engine efficiency and prevent operational downtime in demanding work environments.

Key Features & Benefits

• Direct Replacement Fit: Engineered to OEM size specifications (238-0120 / HD-3535) for a direct, hassle-free installation on the Caterpillar E320D engine.
• Precise Signal Output: Delivers accurate and consistent rotational speed signals to the ECU, ensuring correct fuel injection timing and improved fuel economy.
• Durable Construction: Built with high-quality materials to withstand the extreme vibration, heat, and contaminants common in heavy-duty excavator and construction equipment environments.
• Restored Engine Performance: Replaces a faulty sensor to eliminate common issues such as rough idling, hard starting, stalling, and reduced engine power output.
• Broad Application Range: While primarily designed for the E320D excavator, this sensor is commonly used across various Caterpillar-powered heavy machinery, including loaders, bulldozers, and trucks.
• Cost-Effective Solution: Provides a reliable aftermarket alternative to genuine OEM parts without compromising on fit or function, reducing maintenance costs for fleet operators.

Technical Specifications

OEM Cross-Reference

This Revolution Speed Sensor (HD-3535) is a direct aftermarket replacement for the following original equipment manufacturer (OEM) part numbers:

• Caterpillar OEM: 238-0120
• Reference: HD-3535

Note: Always verify your engine’s specific part number before ordering. While this sensor is designed as a direct replacement, cross-referencing your old part with the OEM number 238-0120 ensures correct fitment.

Compatibility

This sensor is specifically designed for the Caterpillar E320D diesel engine platform. It is commonly used for the following heavy machinery and vehicles that utilize this engine family:

• Excavators: Caterpillar E320D
• Loaders: Various Caterpillar wheel loaders
• Bulldozers: Compatible models using the same sensor
• Trucks & Buses: Certain heavy-duty applications
• Forklifts: Industrial forklifts with Cat engines

Important Fitment Note: This part is designed for the E320D engine model. Compatibility with other models (such as E320C, E320E, or non-Caterpillar machinery) is not guaranteed. Please confirm your engine model and existing sensor part number (238-0120) prior to purchase.

Global Supply & Distribution

We maintain a robust global supply chain and export network to serve B2B clients worldwide. Our logistics capabilities ensure that critical engine parts like this Revolution Speed Sensor reach your operations quickly and reliably.

• Major Markets Served: We regularly export to North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands, France), Asia-Pacific (Australia, Japan, Singapore, UAE), the Middle East (Saudi Arabia, Qatar), and South America (Brazil, Chile).
• Fast Shipping: We offer express shipping (DHL, FedEx, UPS) for urgent orders, as well as economical sea freight for bulk purchases to major ports like Rotterdam, Los Angeles, Shanghai, and Jebel Ali.
• Inventory Availability: As a dedicated supplier located in Guangdong, China, we maintain sufficient stock levels to fulfill both small replacement orders and large fleet maintenance contracts.
• Trade Compliance: All products are packaged and documented in accordance with international trade standards for smooth customs clearance.

Quality Assurance

We are committed to providing high-quality aftermarket parts that meet the rigorous demands of the construction and heavy equipment industry.

• Manufacturing Standards: Components are manufactured in ISO-certified facilities, adhering to strict quality control processes.
• Testing: Each sensor undergoes functional testing to verify signal output and resistance values before shipment. A Machinery Test Report and Video Outgoing Inspection are available upon request to verify product condition.
• Warranty: This product comes with a 6-month warranty against manufacturing defects. We stand behind the durability and performance of our parts.
• Packaging: Parts are securely packed in plastic bags and sturdy boxes or cartons to prevent damage during transit.

FAQ

Q1: How do I confirm this sensor (HD-3535 / 238-0120) fits my Caterpillar E320D engine?
A: To confirm fitment, please locate your existing sensor on the engine. The easiest method is to check the part number stamped on the sensor body. If it reads 238-0120 or HD-3535, this is a direct replacement. You can also verify by checking your engine serial number range against Caterpillar service data. If you are unsure, please contact us with your engine model (e.g., E320D) and the part number of the sensor you are removing.

Q2: What are the common symptoms of a failing revolution speed sensor on an E320D?
A: A failing speed sensor can cause several operational issues. The most common symptoms include: the engine cranking but not starting, erratic or rough idling, sudden stalling, reduced engine power, the “Check Engine” light illuminating on the dashboard, or the engine speedometer/tachometer reading zero or fluctuating wildly. Replacing a faulty sensor with this HD-3535 unit typically resolves these issues immediately.

Q3: Is installation of this sensor straightforward, and are there any special maintenance requirements?
A: Installation is generally straightforward for a qualified mechanic. The sensor is usually located on the engine block near the flywheel or timing gear. The process involves disconnecting the electrical connector, removing the retaining bolt, pulling out the old sensor, and installing the new one. It is critical to ensure the sensor is seated correctly to the correct gap (usually a “touch and back-off” procedure) to avoid damage. No special maintenance is required after installation, but we recommend inspecting the wiring harness connector for corrosion or damage during replacement.