1664377C91 | Genuine OEM International/Navistar Hydraulic Steering Pump Assembly

1664377C91 is a Genuine OEM International/Navistar Hydraulic Steering Pump Assembly designed for compatible heavy-duty truck hydraulic steering systems. The pump assembly generates hydraulic pressure needed to provide power steering assistance and support smooth steering operation.

PRODUCT INFORMATION

• Part Number: 1664377C91
• Brand: International/Navistar
• Condition: New
• Component: Hydraulic Steering Pump Assembly
• Type: Power Steering Pump
• System: Hydraulic Power Steering System
• Application: Heavy-Duty Truck

APPLICATIONS

• Compatible International/Navistar heavy-duty truck steering systems
• Hydraulic power steering applications where 1664377C91 is specified
• Exact fitment depends on vehicle model, model year, steering configuration, hydraulic system, and OE specifications.

FUNCTION

The hydraulic steering pump generates and circulates pressurized fluid through the power steering system to provide steering assistance. Proper hydraulic pressure helps reduce steering effort and supports smooth, responsive steering control.

A worn, damaged, or failing Hydraulic Steering Pump Assembly may cause symptoms such as:

• Hard or heavy steering
• Increased steering effort
• Whining or unusual pump noise
• Slow or inconsistent steering assistance
• Power steering fluid leaks
• Steering system pressure problems

WHY REPLACE A HYDRAULIC STEERING PUMP ASSEMBLY?

A failing hydraulic steering pump can reduce power assistance and make steering more difficult, particularly during low-speed maneuvering. Replacing a worn or damaged pump assembly with the correct OEM-specification part helps restore hydraulic steering assistance and system performance.

FITMENT INFORMATION

Always verify the part number, vehicle model, model year, steering configuration, hydraulic system specifications, and OE specifications before ordering. Exact fitment may vary by vehicle configuration.

If you are unsure whether this part is correct for your vehicle, please contact us with your VIN and original part number. We are happy to help verify compatibility before purchase.

GENUINE INTERNATIONAL/NAVISTAR PART

Part Number: 1664377C91