12 V DC OEM-Quality Replacement Solenoid Speed Cut Off Fuel for Efficient Fuel Control in Thermo King Units

Solenoid Speed Cut Off Fuel 44-6544 – Replacement for Thermo King SB-II / MD-II / Super / Sentry Units

Product Overview

The Solenoid Speed Cut Off Fuel 44-6544 is a premium-quality replacement part engineered for Thermo King SB-II, MD-II, Super, and Sentry refrigeration units.
This solenoid serves as a critical fuel control component, regulating and cutting off the fuel supply when the engine speed needs to be adjusted or when the unit is shutting down.
Its reliable operation helps maintain stable engine performance, protects the compressor, and ensures the refrigeration system continues to deliver precise temperature control during transport.

Manufactured with high-strength materials and advanced electromagnetic components, the 44-6544 solenoid offers long-lasting durability, excellent resistance to vibration, and dependable performance even in harsh operating environments.

Key Features & Benefits

• OEM-Quality Replacement – Designed to meet or exceed Thermo King’s original specifications for perfect fit and function.

• Efficient Fuel Control – Accurately regulates or cuts off the fuel supply to control engine speed and stop the unit when required.

• Heavy-Duty Construction – High-grade steel body and precision coil ensure long service life under continuous operation.

• Fast Response Time – Delivers quick engagement and disengagement to maintain smooth engine operation.

• Corrosion Resistant – Treated surfaces protect against fuel, oil, and moisture exposure.

• Easy Installation – Direct-fit design allows straightforward replacement with minimal downtime.

Applications

This solenoid is compatible with a wide range of Thermo King transport refrigeration units, including but not limited to:

• SB-II Series

• MD-II Series

• Super Series

• Sentry Series

It is ideal for trucks, trailers, and container refrigeration systems where stable engine speed and reliable fuel cut-off are essential.

Installation Tips

1. Safety First – Turn off the refrigeration unit and disconnect the battery before starting installation.

2. Remove Old Solenoid – Disconnect the electrical connector and unscrew the mounting bolts to remove the old part.

3. Install New Solenoid – Position the 44-6544 solenoid and secure it with the original bolts.

4. Reconnect Wiring – Attach the electrical connector and ensure all connections are tight and free of corrosion.

5. System Test – Start the unit and verify proper solenoid operation, ensuring fuel control and engine speed regulation are functioning correctly.

Technical Specifications

Summary

The Thermo King 44-6544 Solenoid Speed Cut Off Fuel is an essential component for maintaining reliable engine speed control and safe fuel management in refrigeration units.
With robust construction, quick response, and direct OEM compatibility, it provides a cost-effective solution for keeping transport refrigeration systems operating at peak performance.

FAQ

Q1:When will you arrange the delivery?

A:Generally 1-2 weeks after the payment, and we will continually inform customer the goods carriage status, until you receive the goods.

Q2. Do you test all your goods before delivery?

A: Yes, we have 100% test before delivery.

Q3:Can we get the some technological training?

Our company provide the complete technological training, including: installation, use and maintenance.

Q4:How long is your products warranty?

A:The products of our lifetime for you to provide maintenance, one year warranty,Courier fees to pay half, after a year of maintenance fees shall be borne by the buyers.

Q5: How do you make our business long-term and good relationship?

A:1. We keep good quality and competitive price to ensure our customers benefit ; 2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.

Guangzhou Kaida Refrigeration Technology Co., Ltd. is a professional enterprise dedicated to the design, production, and distribution of refrigeration equipment. The company occupies a total area of 15,000 square meters, equipped with modern production facilities and a skilled workforce. With 20 experienced technical professionals and 5 senior engineers, Kaida Refrigeration develops and manufactures more than 30 types of refrigeration machines to meet the diverse needs of its customers.

The company's product line covers a wide range of refrigeration solutions, including truck refrigeration units, cold storage systems, and specialized equipment for industries such as food transportation, pharmaceutical logistics, and industrial cooling. Each product is designed with a focus on efficiency, reliability, and durability, ensuring consistent performance under demanding conditions.

Guangzhou Kaida Refrigeration values innovation and quality, consistently investing in research and development to improve its product offerings and adapt to changing market demands. Its technical team works closely with clients to provide tailored solutions that align with specific operational requirements.

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