Core Functions

• Hydraulic Pressure Generation: Converts rotational power from the engine (via a drive belt) into hydraulic pressure (typically 800–1,200 PSI, per Volvo’s standards). This pressure is transmitted to the steering rack, which uses it to amplify the driver’s steering input—reducing turning effort by 50–70% compared to manual steering.
• Consistent Steering Assist: Maintains stable pressure and flow rate across all engine speeds (idle to high RPM). At low speeds (e.g., parking), it increases flow to maximize assist; at high speeds, it modulates pressure to retain road feel (preventing over-assist, which reduces driver control).
• Heat Dissipation: The aluminum housing and internal fluid channels dissipate heat generated by hydraulic friction. This prevents the power steering fluid from overheating (which degrades fluid performance and damages seals), ensuring reliable operation even in extreme conditions (e.g., heavy traffic, hot climates).
• System Protection: Features a built-in pressure relief valve that prevents excessive pressure buildup (e.g., if the steering wheel is turned to full lock for extended periods). This protects the steering rack, hoses, and reservoir from damage, extending the overall lifespan of the power steering system.

Compatible Vehicles

This Power Steering Pump (OE: 36000790) is specifically tailored for Volvo’s wagon, sedan, and crossover models from the late 2000s to early 2010s. Below is a consolidated list of variants and applicable years :

Notes: “(07-)” / “(08-)” denote models launched from the specified year onward. “S80L” refers to the long-wheelbase variant of the S80 (primarily for Asian markets). For 100% fitment accuracy, confirm compatibility with your vehicle’s VIN (Vehicle Identification Number) or Volvo’s official service manual—this accounts for engine-specific drive belt configurations and regional steering system variations.

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