Product Description
OEM specification master cylinder (CT 9124665300) for Caterpillar electric lift trucks and Mitsubishi forklifts; includes 0.750-inch bore diameter, cast iron construction, and direct mount fitment. Cross-references and supersedes multiple Caterpillar and Mitsubishi part numbers. For use in hydraulic brake systems with DOT 3/4 fluid.
Specifications
Hydraulic
| Primary Function | Supplies hydraulic pressure for electric lift truck brake actuation |
| Working Fluid | DOT 3 or DOT 4 hydraulic brake fluid (verify system requirements) |
Material & Construction
| Piston Material | Hardened steel |
| Seal Material | Nitrile rubber (OEM-grade hydraulic seal compound) |
Part Numbers
| OEM Part Number | CT 9124665300 |
| Manufacturer Part Number | 91246-65300 |
| Cross-Reference Part Numbers | 9124665300, 91246-65300, 91246-55300, 9124655300, CT91246-65300, CT9124665300, MB91246-65300, MB9124665300 |
| Supersedes/Replaces | 91246-55300, 9124655300, MB91246-65300, MB9124665300 |
Frequently Asked Questions
Q: What is the bore diameter of the CT 9124665300 master cylinder?
A: The CT 9124665300 master cylinder has a 0.750-inch bore diameter, a standard size for electric lift truck and forklift hydraulic brake systems.
Q: What material is the CT 9124665300 master cylinder constructed from?
A: The CT 9124665300 is constructed from cast iron, which provides durability and thermal stability required for hydraulic brake system service in material handling applications.
Q: Which brake fluid specification does the CT 9124665300 use?
A: The CT 9124665300 master cylinder is designed for DOT 3 or DOT 4 brake fluid, consistent with hydraulic brake systems on Caterpillar electric lift trucks and Mitsubishi forklifts.
Q: What are the cross-reference part numbers for the CT 9124665300?
A: Cross-reference numbers include 91246-65300, 9124665300, CT91246-65300, and MB9124665300. The CT 9124665300 supersedes the earlier 91246-55300, 9124655300, and MB91246-65300 designations.
Q: Which lift truck brands does the CT 9124665300 master cylinder fit?
A: The CT 9124665300 is an OEM specification master cylinder for Caterpillar electric lift trucks and Mitsubishi forklifts. Verify mounting bracket type and brake line connection compatibility before ordering for non-OEM applications.
Q: How do I know if the master cylinder needs replacement?
A: Replace the CT 9124665300 if you experience brake fluid leaks from the cylinder body, soft or spongy brake pedal that cannot be bled out, reduced braking pressure, or visible corrosion or damage to the cast iron body.