Product Description
Master cylinder 91246-55300 is a 0.75-inch bore hydraulic brake actuator compatible with Mitsubishi and Caterpillar electric forklifts, constructed in cast iron with NBR seals, and typically used for brake actuation in electric lift truck applications.
Specifications
Part Numbers
| OEM Part Number | 91246-55300 |
| Compatible Equipment Models | Mitsubishi FBC20A2BC2, FG20F17A, FG30F13C, FG35AF13C; also fits Caterpillar lift trucks |
Frequently Asked Questions
Q: What is the bore size and material of the 91246-55300?
A: The 91246-55300 has a 0.75 inch (19 mm) bore and is constructed from cast iron. Cast iron provides excellent durability and thermal conductivity for brake system applications in electric lift trucks.
Q: Which Mitsubishi forklift models are compatible with the 91246-55300?
A: The 91246-55300 fits Mitsubishi models FBC20A2BC2, FG20F17A, FG30F13C, and FG35AF13C. Verify your equipment serial number to confirm compatibility before ordering. These models represent 20,000 to 35,000 pound capacity electric lift trucks.
Q: Is the 91246-55300 also compatible with Caterpillar lift trucks?
A: Yes, the 91246-55300 fits Caterpillar electric lift truck models within the 20,000 to 35,000 pound capacity range. Verify the exact model designation and brake system configuration on your Caterpillar equipment to ensure fitment.
Q: What seal material is used in the 91246-55300?
A: The 91246-55300 uses NBR (nitrile) seals, which provide reliable performance with DOT 3 and DOT 4 brake fluids. NBR seals are standard in modern material handling equipment and deliver consistent sealing characteristics across typical warehouse temperature ranges.
Q: What is the primary function of the 91246-55300 in the brake system?
A: The 91246-55300 is a hydraulic brake actuator that converts mechanical pedal force into hydraulic pressure to actuate the service brake. It is the primary pressure-generating component in the lift truck brake circuit and requires proper fluid maintenance to function reliably.
Q: How can I verify the 91246-55300 is the correct replacement for my lift truck?
A: Locate your equipment model number on the data plate and cross-reference it against the compatible model list (Mitsubishi FBC20A2BC2, FG20F17A, FG30F13C, FG35AF13C; Caterpillar lift trucks). Measure the bore diameter on your existing master cylinder to confirm the 0.75 inch size before ordering.