Removal (Sienna)

Raise and support front of vehicle. Remove clip, and disconnect fluid return hose. Use drain pan to catch power steering fluid when connections are released. Remove clamps and holders from pressure feed pipe. Remove pressure feed pipe from power steering gear.
Loosen top and bottom pump bolts, and remove drive belt. Disconnect oil pressure switch connector. Loosen bolt hidden behind power steering pump drive pulley until power steering pump can be removed (bolt cannot be fully removed). See Fig 1.
Remove oil pressure switch from union bolt. Remove union bolt and gasket. Remove pressure feed line.

Fig 1: Locating & Loosening Hidden Bolt Located Behind Power Steering Pump Drive Pulley (Sienna)