Sinotruk HOWO 371 Steering Tie Rod Arm (AZ9719410040) – High-Strength Forged Steering Knuckle Arm

Sinotruk HOWO 371 Steering Tie Rod Arm (AZ9719410040) – High-Strength Forged Steering Knuckle Arm

The AZ9719410040 Steering Tie Rod Arm is a vital link in your HOWO 371’s front axle assembly, responsible for translating steering force into wheel movement.

- Part Number: AZ9719410040
- Product Type: Steering tie rod arm
- Application: Heavy-Duty Trucks (Compatible with HOWO 371 Parts), Steering System
- Material: High-Grade 40Cr Alloy Steel (Heat-Treated & Surface Hardened)
- Weight: 5.6kg
- Dimensions: Length: 280mm; Mounting Hole Diameter: 22mm; Ball Joint Diameter: 30mm; Thread Size: M30×1.5 RHT
- Surface Hardness: ≥45HRC (Compliant with GB/T 230.1 Standard)
- Load Capacity: 6000N (Maximum Lateral Load)

Installation Notes 
Tapered Fit Inspection: Before installing the AZ9719410040, ensure the tapered hole in the steering knuckle is clean and free of debris. A loose fit here will cause the arm to "vibrate" loose, even if the bolt is tight.
Torque Verification: Use a calibrated torque wrench to tighten the mounting bolts to Sinotruk factory specifications. Under-tightening leads to play; over-tightening can cause stress fractures in the forged steel.
Mandatory Alignment: Any time you replace a steering arm or tie rod component on a HOWO 371, you must perform a professional toe-in alignment. Failure to do so will scrub your tires and put unnecessary stress on the new arm.
Cotter Pin Safety: Always use a new cotter pin to lock the castle nut. Never reuse an old pin, as metal fatigue can cause it to snap under steering pressure.