Air/Hydraulic Actuators

Versatile, high-performance air/hydraulic actuators are designed to utilize  available pressurized air sources to produce high hydraulic pressures for brake applications in construction, material handling, mining, forestry and farming industries and a range of other industrial applications.

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Air/Hydraulic Actuator

Master Cylinder with Air Chamber

WABCO master cylinder type air/hydraulic actuator is the combination of a conventional master cylinder and an air chamber. The master cylinder is a single acting type with one piston. 

Air pressure is used to actuate a push rod into the air chamber. The push rod in turn moves the piston in the master cylinder which forces the hydraulic fluid into the system.

Available with or without internal residual check valve

Incorporates  a conventional master cylinder

Available for industrial and mobile applications

Sealed diaphragm fluid reservoir

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Air/Hydraulic Actuator

Straight Bore Master Cylinder with Air Chamber

This air/hydraulic actuator is similar to those found above. This model however, uses a larger straight bore master cylinder for more displacement and a larger air chamber for more pressure. Like the previous model, air pressure is used to actuate a push rod in the air chamber. In turn the push rod moves the master cylinder piston which forces hydraulic fluid into the system.

Available with or without internal residual check valve

Incorporates a conventional master cylinder

Available for industrial and mobile applications

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Air/Hydraulic Actuator

Stem Seal Master Cylinder with Air Chamber

The air/hydraulic actuators are a combination of a fluid actuator and an air chamber. They are designed to utilize the available pressurized air sources to produce hydraulic pressure. The stem seal actuator eliminates cup cutting by allowing the cups to move freely in the master cylinder without passing over any ports.

Available for industrial and mobile applications using hydraulic oil or brake fluid

Includes stroke indicator

Internal valving design enhances bleeding process and extends normal service life of primary seal

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Air/Hydraulic Actuator

Stem Seal Actuator with Air Chamber

WABCO's straight bore actuator type air/hydraulic actuator is the combination of a remote actuator and an air chamber. The remote actuator has a single acting piston with a stem seal. The stem seal actuator eliminates cup cutting by allowing the cups to move freely in the master cylinder without passing over any ports.

Allows towed vehicle's brakes to be controlled from brake pedal of towing vehicle

Ideal for spring brakes - cup seals never pass over ports

Available for industrial and mobile applications

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Fluid Reservoirs

For Direct or Remote Mounting

WABCO offers two reservoir designs: polyallomer reservoir and metal reservoir.

Polyallomer reservoir is translucent for easy view of fluid level and provides diaphragm that seals out environmental contaminates.

238 cm3 (14.5 in3 ) usable fluid capacity

Adaptable outlet fittings

Sediment trap inherent to design

Available for hydraulic oil and brake fluid

The metal reservoir is rugged anodized aluminium housing with an easy screw on and off filler cap with baffle and breather.

Compact design for ease of mounting

54 cm3 (3.3 in3 ) usable fluid capacity

Adaptable outlet fittings 

Compatible with hydraulic oil or brake fluid

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Custom Engineered

Air/Hydraulic Actuators
WABCO custom engineers products for specific applications that meets or exceeds customer specific requirements. Contact an off-highway representative for your customer solution.

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