1. What is an Air Over Hydraulic Booster?

The Air Over Hydraulic (AOH) system is a mechanism that uses air pressure to generate hydraulic pressure. It is preferred in trucks, buses, and construction machinery where traditional fully air-operated brakes are not suitable or where hydraulic braking precision is required. The booster (boosting unit) multiplies the driver’s pedal force using air power and transmits it to the hydraulic main unit.

Technical Specifications

Hydraulic Fluid: DOT 4
Air Brake Chamber Type: Type 24
Maximum Air Pressure: 7.5 Bar
Piston Diameter: 33.34 mm