Hydraulic Booster Operation

Hydraulic Booster Operation

Inlet Port

• The inlet port is where the fluid enters from the power steering pump.
• The fluid goes through the center and passes through an outlet filter.
• It then passes a return spring and goes out through a flow switch.
• It has a straight flow-through system under normal operations.

Straight Flow

• The power steering gets all the fluid it needs.
• When the brake is applied, the force is magnified by a piston inside the booster.
• The fluid stops and fills up behind the piston which then creates pressure.
• This pressure provides the boost for the brake pedal.
• In the hold position, the force on the brake pedal will not be showing when the rod is.

Throttle Valve

• The throttle valve closes the effort, but fluid continues to flow through the power steering.

Flow Switch

• The flow switch controls the electric pump.
• Shutting off the flow switch does not bleed the hydraulics out of the system.

Hydraulic Safety

• Hydraulic systems have backups and can be dangerous.
• Caution: Never trust hydraulics, as they can cause serious injury.
• Always release pressure before disconnecting hydraulic lines.
• Dealing with Power Steering and Brakes requires extra caution.
• Pump the brakes multiple times and moving the steering wheel to release pressure.
• Hydraulic injection under the skin is dangerous.