
Product Introduction
The WG9725470081 power steering gear box is a hydraulic steering system component designed for SINOTRUK HOWO 6×4 tractor trucks. It converts steering wheel input into precise hydraulic-assisted motion, enabling smooth and stable steering control for heavy-duty front axle systems.
This steering gear box is engineered to reduce driver steering effort significantly, especially during low-speed operation, full-load transport conditions, and complex road environments. It improves driving comfort while maintaining accurate directional control and vehicle stability.
The housing is manufactured from high-strength cast iron material, ensuring durability under continuous hydraulic pressure and heavy-duty working conditions. Internal precision-machined components guarantee stable hydraulic response and long service life.
Each unit is strictly tested for hydraulic sealing, pressure resistance, steering accuracy, and durability to meet OEM standards required for heavy truck applications.

Technical Specifications
| Item | Specification |
| Product Name | Power Steering Gear Box |
| Part Number | WG9725470081 |
| System Type | Hydraulic Steering System |
| Vehicle Models | HOWO 6×4 Tractor |
| Application | Front Axle Steering Control System |
| Material | High Strength Cast Housing + Precision Internal Components |
| Condition | New |
| OEM Standard | Yes |
| Quality Test | Hydraulic Pressure & Durability Tested |
| Origin | China |
| Packaging | Export Standard Wooden Box / Steel Frame |
Vehicle Fitment
| Vehicle Brand | Compatible Models |
| SINOTRUK | HOWO 6×4 Tractor |
| SINOTRUK | HOWO Heavy Duty Series |
| SINOTRUK | Tractor Head Platforms |
| UNIVERSAL | Hydraulic Steering Systems |
Payment & Shipping
| Category | Options |
| Payment Methods | T/T, PayPal, Western Union, MoneyGram, Visa, MasterCard, L/C, Alibaba Trade Assurance |
| Shipping Methods | DHL, FedEx, UPS, TNT |
| Delivery Time | 3–7 Days (Express), 20–45 Days (Sea Freight) |
| Trade Terms | EXW, FOB, CFR, CIF, DDP |
| Shipping Scope | Worldwide Shipping Available |
Related Products Categories
| Section/System | Common Spare Parts |
| Cylinder Block & Cylinder Head | Cylinder Block, Cylinder Head, Cylinder Liner, Piston, Piston Ring, Cylinder Head Gasket |
| Crankshaft System | Crankshaft, Connecting Rod, Main Bearing, Connecting Rod Bearing, Thrust Washer |
| Valve Train | Intake Valve, Exhaust Valve, Camshaft, Rocker Arm, Valve Spring |
| Turbocharger System | Turbocharger, Turbo Repair Kit, Intercooler, Intake Pipe |
| Fuel System | Fuel Injector, Injector Nozzle, Fuel Pump, Fuel Filter |
| Cooling System | Water Pump, Thermostat, Radiator, Expansion Tank |
| Lubrication System | Oil Pump, Oil Filter, Oil Cooler, Oil Pan |
| Intake & Exhaust System | Air Filter, Air Cleaner Assembly, Exhaust Pipe, Muffler, DPF, SCR |
| Engine Electrical Parts | Starter Motor, Alternator, Sensors, Wiring Harness |
Transmission & Drivetrain Parts
| Section/System | Common Spare Parts |
| Clutch System | Clutch Disc, Pressure Plate, Release Bearing, Clutch Master Cylinder, Clutch Booster |
| Transmission System | Gearbox Assembly, Synchronizer, Gear Set, Bearing, Oil Seal, Shift Fork |
| PTO System | PTO Assembly, PTO Gear, PTO Pump, PTO Seal |
| Driveshaft System | Driveshaft Assembly, Universal Joint, Center Bearing, Slip Yoke |
| Differential System | Differential Assembly, Crown Wheel & Pinion, Differential Bearing, Repair Kit |
| Section/System | Common Spare Parts |
| Front Axle | Kingpin Kit, Steering Knuckle, Ball Joint, Tie Rod, Wheel Bearing |
| Rear Drive Axle | Axle Housing, Half Shaft, Differential Housing, Hub Bearing |
| Suspension System | Leaf Spring, Air Spring, Shock Absorber, Equalizer Beam, U-Bolt |
| Steering System | Steering Gearbox, Power Steering Pump, Drag Link, Steering Shaft |
| Brake System | Brake Drum, Brake Disc, Brake Pad, Brake Chamber, Slack Adjuster |
| Wheel Hub System | Wheel Hub, Wheel Bearing, Oil Seal, Wheel Bolt, Wheel Nut |
Cabin & Body Parts
| Section/System | Common Spare Parts |
| Cabin Assembly | Cabin Shell, Cabin Suspension, Cabin Lock, Cabin Mount |
| Dashboard System | Instrument Cluster, Dashboard Panel, Switch Assembly |
| Door System | Door Assembly, Door Lock, Door Handle, Window Regulator |
| Seat System | Driver Seat, Passenger Seat, Seat Shock Absorber |
| Air Conditioning System | AC Compressor, Condenser, Evaporator, Blower Motor |
| Electrical System | Headlamp, Tail Lamp, Fog Lamp, Wiring Harness, Relay |
| Mirror System | Rear View Mirror, Mirror Arm, Mirror Cover |
| Body Exterior Parts | Bumper, Grille, Fender, Mudguard, Step Panel |
