H4 Model

Disconnect the ground cable from the battery.
Remove the air intake duct. <Ref. to REMOVAL , Air Intake Duct (H4DOTC).> <Ref. to REMOVAL , Air Intake Duct (H4SO).>
Remove the pulley belt cover.
Loosen the belt tension securing bolt and generator securing bolt, then remove the power steering pump V-belt.

Fig 1: Locating Belt Tension Bolt And Generator Bolt
Courtesy of SUBARU OF AMERICA, INC.
Disconnect the connector from the power steering pressure switch.
Disconnect the pressure hose and suction hose from the oil pump.
CAUTION:
- Do not allow fluid to come into contact with the pulley belt.
- To prevent foreign matter from entering the hose and pipe, cover the open ends with clean cloth.
- Non-turbo model
  
  Fig 2: Identifying Suction Hose And Pressure Hose (Non-Turbo Model)
  Courtesy of SUBARU OF AMERICA, INC.
- Turbo model
  
  Fig 3: Identifying Suction Hose And Pressure Hose (Turbo Model)
  Courtesy of SUBARU OF AMERICA, INC.
Remove the installation bolt of the power steering pump bracket.

Fig 4: Locating Power Steering Pump Bracket Bolts
Courtesy of SUBARU OF AMERICA, INC.
Place the oil pump bracket in a vise, and remove the two bolts from the front side of the oil pump.
CAUTION: When securing the oil pump bracket in a vice, hold the oil pump bracket with the least possible force between two pieces of wood.

Fig 5: Locating Oil Pump Bracket Bolts
Courtesy of SUBARU OF AMERICA, INC.
Remove the bolt from the rear side of oil pump.
Disassemble the oil pump and bracket by inserting a flat tip screwdriver as shown in the figure.

Fig 6: Removing Oil Pump And Bracket By Inserting Flat Tip Screwdriver
Courtesy of SUBARU OF AMERICA, INC.