Hydraulic Power Steering Box for HINO 300 Truck LHD OEM Standard Steering Gear Assembly

Precision-engineered hydraulic power steering gear box converts steering wheel input into hydraulic force, providing smooth, responsive steering control for HINO 300 series trucks.

The Power Steering Box / Steering Gear Assembly (OEM Numbers: 44110-37300 / 4411037300) is a premium-quality, direct replacement steering component designed specifically for HINO 300 series trucks. This precision-engineered steering gear is a critical component of the vehicle's power steering system, responsible for translating the driver's steering commands into actual steering movements of the wheels.

• OE Quality: Manufactured to strict HINO dimensional and performance specifications for perfect fit and function
• Durable Construction: Robust design withstands high pressures and temperatures for heavy-duty use
• Precise Steering Control: Delivers smooth, responsive steering assistance for improved vehicle handling
• Direct Replacement: Precision-engineered to match factory specifications for easy installation
• Restores Steering Performance: Eliminates excessive steering play, hard steering, and fluid leaks
• Enhances Driver Safety: Proper steering function ensures precise vehicle control and safe operation
• Long Service Life: Engineered to withstand the rigors of heavy-duty commercial operation

This power steering box is specifically designed for HINO trucks. Common applications include:

• HINO 300 Series - Light to Medium-Duty Trucks
• HINO Dutro - Light to Medium-Duty Trucks
• HINO 300 Series (N04C) - N04C Engine Applications

• N04C - 4.0L 4-Cylinder Diesel
• J08C - 8.0L 6-Cylinder Diesel

Professional installation required. Steering system safety is critical:

1. Raise and secure the vehicle - Safely lift the front of the vehicle and support on jack stands
2. Disconnect battery - Disconnect the negative battery cable before beginning work
3. Drain power steering fluid - Drain the power steering fluid from the system
4. Disconnect fluid lines - Carefully disconnect the pressure and return lines from the steering gear
5. Disconnect the steering column - Remove the steering column coupling from the steering gear input shaft
6. Remove the old steering gear - Unbolt and remove the steering unit from the chassis
7. Inspect steering linkages - Check the pitman arm, drag link, and tie rods for wear or damage
8. Clean mounting area - Clean the chassis mounting surface and surrounding area
9. Prepare the new steering gear - Inspect the new unit and verify it matches the original
10. Install the new steering gear - Position the new unit on the chassis and secure with mounting bolts
11. Torque to specification - Tighten mounting bolts to manufacturer specification
12. Connect the steering column - Reconnect the steering column coupling to the input shaft
13. Reconnect fluid lines - Reconnect the pressure and return lines to the steering gear
14. Refill with power steering fluid - Fill the reservoir with the recommended type of fluid
15. Bleed the steering system - Bleed air from the system by turning the steering wheel lock-to-lock
16. Check for leaks - Start the engine and inspect all connections for fluid leakage
17. Check steering operation - Test the steering for proper feel and response
18. Perform wheel alignment - Professional wheel alignment is recommended after installation
19. Road test - Test drive the vehicle to verify smooth, responsive steering operation

• Material Verification: Confirms construction meets OE strength and durability specifications
• Dimensional Inspection: Mounting points and port threads verified against OEM tolerances
• Leak Testing: Pressure-tested for internal and external fluid leakage
• Performance Testing: Steering assistance and responsiveness verified under simulated operating conditions
• Durability Testing: Cycle-tested to ensure reliable performance over the service life
• Visual Inspection: 100% checked for casting defects, machining flaws, or damage
• Packaged Safely: Protected and securely packaged to prevent damage during transit

• Neutral export packing or customized packaging available
• Carton or wooden case for safe transportation
• Fast delivery for stock items
• Shipping by Express Air or Sea

For pricing, availability, or bulk purchase of the Power Steering Box 44110-37300 For HINO 300 Truck LHD 4411037300 Truck Parts, please contact our sales team for a competitive quote and expert technical support.