NEW Hydromax Booster | Casting #2772114 | Long Round Forked Rod
SKU: 52991777
International Bus & Freightliner Grade
ABC Dynamics: Precision Braking for School Bus Fleets and Industrial Chassis.
Restore your vehicle’s braking power with this brand new Hydromax Brake Booster. This direct replacement unit is specifically engineered for International Bus, School Bus, and Freightliner models that utilize a long forked, round-end pedal rod configuration.
Designed for uncompromising performance in both automotive and heavy-duty industrial environments, this unit ensures reliable hydraulic assist for safety-critical transportation.
Technical Specifications
| Spec Identifier | Detail | Application Note |
|---|---|---|
| Condition | NEW | Non-remanufactured, factory fresh component. |
| Casting Numbers | 2772114 / 0204745907 | Primary cross-reference for fitment verification. |
| Pedal Rod Type | Long Forked, Round End | Pre-installed; verify linkage style before ordering. |
| Sealing Hardware | Oval O-Rings Included | Ensures a high-pressure seal for the backup pump motor. |
Verified Bus & Truck Applications
International Bus Series
- 3000, 3000FE, 3400 Series
- 3600, 3700, 3800 Series
- 3900FC & School Bus Chassis
Freightliner & Fleet
- Compatible Freightliner S-Series
- Medium-Duty Industrial Chassis
- Legacy 1-Pin Retrofits (Adapter Required)
⚠ Critical Installation Information
- Legacy Conversion: If you are replacing an older style Hydromax (Casting #2771424 or #2771819) with a 1-pin flow switch, you MUST purchase Flow Switch Adapter SKU# 529999.
- Hardware Note: Oval O-rings for the pump motor are included. However, some mounting studs or nuts may need to be reused from your original unit.
- Core Refund: Return your old, like-for-like core within 90 days to receive a $50.00 refund.
Technical Resources
Access system wiring and full maintenance procedures in the technical manual.









