Product Description
Caterpillar CT NA018149 Handle Return Spring is a SAE 1070 high-carbon steel helical extension spring, designed for use with Caterpillar electric lift truck models EP16K, EP18K, EP20K. Features a spring diameter of 0.500 inches, free length of 3.750 inches, double loop ends, and rated return force of 15.2 lbs at 2 inch extension. Supersedes CAT 918149 and equivalent Clark 918149 part numbers.
Specifications
Material & Construction
| Spring Material | SAE 1070 high-carbon spring steel |
| Tensile Strength | 180 ksi minimum |
| Hardness | Rockwell C47–C52 |
Mechanical Specifications
| Number of Coils | 28 active coils |
Part Numbers & Compatibility
| OEM Part Number | CT NA018149 |
| Cross-Reference Part Numbers | Supersedes 918149, replaces CAT 918149, equivalent to Caterpillar 918149-00, interchangeable with Clark 918149 |
| Compatible Models | Fits Caterpillar electric lift truck models with handle assemblies CAT EP16K, EP18K, EP20K series |
Performance Specifications
| Service Life | 100,000 cycles minimum at rated load |
Frequently Asked Questions
Q: What equipment does the CT NA018149 handle return spring fit?
A: The CT NA018149 is designed for Caterpillar electric lift truck models EP16K, EP18K, and EP20K series. These springs control handle assembly return force.
Q: What are the physical specifications of the CT NA018149 spring?
A: The CT NA018149 is a SAE 1070 high-carbon steel helical extension spring with a 0.500 inch diameter, 3.750 inch free length, and double loop ends. It provides a rated return force of 15.2 pounds at 2 inch extension.
Q: What is the material composition of the CT NA018149?
A: The CT NA018149 is manufactured from SAE 1070 high-carbon steel, which provides superior strength, fatigue resistance, and durability for repeated use in handle assemblies.
Q: What cross-reference parts are equivalent to the CT NA018149?
A: The CT NA018149 supersedes and replaces the earlier CAT 918149 part number. It is equivalent to Caterpillar 918149-00 and interchangeable with Clark 918149 springs for equivalent Caterpillar models.
Q: What is the return force rating of the CT NA018149?
A: The CT NA018149 provides a rated return force of 15.2 pounds when extended 2 inches, ensuring reliable handle spring-back in control lever assemblies.
Q: What is the lifespan of the CT NA018149 spring?
A: SAE 1070 high-carbon steel springs like the CT NA018149 are engineered for extended cycle life in heavy industrial service. Actual lifespan depends on operating frequency, load cycling, and maintenance conditions. Springs should be replaced if they lose return force or show fatigue failure.