Product Description
Direct replacement brake master cylinder 91246-15300 for Mitsubishi F18A, FD20, and FD25 series electric lift trucks. Features a 0.75 inch bore, cast iron housing, and 3/8-24 UNF hydraulic port for reliable brake system operation. Factory-spec equivalent to Mitsubishi part 91246-55300. Designed to provide the primary hydraulic pressure source for brake actuation on electric pallet jacks and forklifts.
Specifications
Hydraulic
| Outlet Port Thread | 3/8 inch-24 UNF female |
| Bore Size | 0.75 inch |
| Pressure Rating | Maximum working pressure: 1,000 PSI |
Material & Construction
| Body Material | Cast iron housing |
| Piston Material | Hardened steel |
| Seal Material | Nitrile rubber, compatible with brake fluid |
Part Numbers
| Primary Part Number | 91246-15300 |
| Cross-Reference Part Numbers | 91246-55300 |
| Alternative Part Numbers | 9124615300 |
| Direct Replacement For | 91246-55300 |
| Compatible Models | Mitsubishi F18A, FD20, FD25, FD23, FD30, FG20, FG25, FG30 |
Frequently Asked Questions
Q: What equipment is the 91246-15300 master cylinder designed for?
A: The 91246-15300 is an OEM brake master cylinder compatible with Mitsubishi F18A, FD20, and FD25 series electric lift trucks. It provides the primary hydraulic pressure source for brake system actuation on these models.
Q: What are the specifications of the 91246-15300?
A: The 91246-15300 features a 0.75 inch bore diameter and a cast iron body for strength and heat dissipation. The hydraulic port uses 3/8-24 UNF thread for connection to brake lines. These specifications ensure compatibility with Mitsubishi brake circuit design.
Q: Does the 91246-15300 replace other part numbers?
A: Yes, the 91246-15300 directly replaces the Mitsubishi part 91246-55300. Both part numbers refer to the same OEM component and are fully interchangeable. Verify your current part number matches before ordering.
Q: What failure symptoms indicate the 91246-15300 needs replacement?
A: Replace the master cylinder if you experience brake fluid leakage from the cylinder body, soft or non-responsive brake pedal, or inability to maintain brake pressure. Internal seal failure compromises braking function and must be addressed immediately.
Q: How does cast iron body material benefit the 91246-15300?
A: Cast iron provides excellent durability under high-pressure brake cycles and resists corrosion in warehouse environments. The material dissipates heat generated during braking, keeping brake fluid temperature stable and preventing seal degradation.
Q: What should I verify before ordering the 91246-15300?
A: Confirm your Mitsubishi lift truck model is F18A, FD20, or FD25 series. Verify the existing part number is 91246-55300 or 91246-15300. Check that the hydraulic port orientation and 3/8-24 UNF thread match your brake circuit configuration.