Hydraulic Booster System High Pressure (Supply) Low Pressure (Return)

Hydro Boost System Master Cylinder Accumulator Hydro Boost Booster Assembly Power Steering Pump Power Steering Gear Pressurized Power Steering Fluid Low Pressure Return

Power Piston Lip Seal Spool Valve Bore Seal Spool Valve Bore Plug Input Push Rod Seals Pressure Housing Seal Power Piston Bore Spool Valve Bore Pressure Chamber Accumulator Housing & Seals Main Housing Pressure Housing

Accumulator Valve & Drillings Nitrogen Gas Accumulator Supply Drilling Accumulator Diaphragm Accumulator Check/Apply Valve

Spool Valve Accumulator Valve Operating Cone Sliding Collar & Spring Check Ball Spool Valve Components

Spool Valve Input Push Rod Input Push Rod Seals “Pedal Feel” Spring Power Piston Linkage Lever Operating Collar Power Piston & Push Rod

Linkage Lever Pressure Housing Seal Pressure Chamber Pressure Housing Lever and Pressure Housing

Plumbing To Gear To Reservoir From Pump

Apply & Release

Spool Valve Operation Fluid to P/S gear is partially restricted, causing pump pressure to rise Fluid return to reservoir is closed off Pump pressure enters pressure chamber through spool valve drillings Return port to reservoir opens, venting pressure chamber through spool valve drillings Passage to steering gear is open Spool valve drilling is isolated from apply and return ports, trapping fluid in pressure chamber HoldingUnappliedLight ApplicationReleasing to UnappliedHard Application Fluid to P/S gear is fully blocked: P/S pump pressure rises to maximum

Apply Release Apply & Release

Accumulator Assisted Apply Spool Valve Operation