Product Introduction

This heavy-duty steering knuckle is a critical component of the front wheel-end and steering system. It integrates the wheel hub, brake caliper mount, and steering arm connection points into a single, rigid structure, ensuring precise wheel positioning and reliable steering performance under heavy loads.

Structure & Material

• Material: High-strength ductile cast iron, selected for its exceptional rigidity, impact resistance, and ability to withstand the mechanical stresses of heavy-duty operation.

• Design: A one-piece cast knuckle with precision-machined bores for the wheel hub and wheel bearing, mounting points for the brake caliper, and connection points for the steering arm and tie rod. The geometry is optimized to maintain correct steering geometry and wheel alignment.

Performance

• Precision Alignment: The precision-machined bores ensure the wheel hub and bearing are perfectly aligned, maintaining accurate wheel positioning and reducing tire wear.

• Load Distribution: The robust cast iron construction distributes the vehicle’s weight and dynamic loads evenly across the wheel-end components.

Core Function

1. Wheel & Brake Mounting: Provides a rigid interface for attaching the front wheel hub, bearing, and brake assembly.

2. Steering Linkage Connection: Connects to the steering arm and tie rod, translating steering input into wheel movement.

3. Load Support: Bears the vehicle’s weight and dynamic operating loads.

Steering Knuckle, L AZ4071418013 – Sinotruk Sitrak OEM Replacement

When your heavy-duty Sitrak truck demands precise steering control and reliable load-bearing performance, every component in the front axle assembly matters. The Left Steering Knuckle AZ4071418013 is engineered to deliver exactly that — consistent directional accuracy, structural durability, and seamless OEM fitment for Sinotruk Sitrak commercial vehicles. Sourced directly from Mettlead’s factory in China, this part reaches your warehouse faster, at a competitive price, without compromising on quality.

Key Functions and Buyer Benefits

Precision Steering Control

This left-side steering knuckle serves as the pivotal connection between the front axle beam and the wheel hub assembly. It translates driver input into accurate wheel movement, ensuring your Sitrak fleet maintains safe, predictable handling — even under full payload conditions.

Heavy Load-Bearing Capacity

Designed to withstand the constant dynamic forces of heavy-duty transport, the AZ4071418013 knuckle absorbs road impact, braking stress, and cornering loads. Its forged construction resists fatigue cracking over extended service intervals, which means fewer unplanned replacements for your fleet.

Direct OEM Fitment

The part number AZ4071418013 guarantees bolt-on compatibility with Sinotruk Sitrak front axle systems. There is no need for machining, modification, or guesswork — it drops right into place, reducing your workshop downtime considerably.

Factory-Direct Cost Advantage

By sourcing through Mettlead, you eliminate middlemen markups. Our direct relationship with manufacturing facilities in China allows us to offer bulk-friendly pricing that protects your procurement budget while maintaining strict quality standards.

Technical Specifications

Application Scenario

The Left Steering Knuckle AZ4071418013 is specifically designed for Sinotruk Sitrak heavy-duty truck models. Mounted on the left side of the front axle, it performs three critical roles simultaneously:

1. Steering pivot: It acts as the axis around which the left front wheel turns, directly controlling directional changes.
2. Load transmission: It transfers vertical vehicle weight and dynamic driving loads from the axle beam to the wheel bearing and hub.
3. Component integration: It provides mounting points for brake caliper brackets, tie rod ends, and king pins — unifying the entire front-end steering geometry.

Whether your Sitrak trucks run long-haul logistics routes or demanding construction-site operations, this steering knuckle maintains structural integrity across hundreds of thousands of kilometers. For more Sitrak-compatible components, explore our full Sitrak Heavy-Duty Parts catalog or browse our Front Axle Parts category.

OEM/ODM Capability

White-Label and Custom Packaging

Mettlead understands that distributors and wholesalers often need parts under their own brand identity. We offer flexible neutral packaging, white-label options, or fully customized packaging with your company logo, part numbers, and language-specific labels.

Strict Quality Control Process

Every steering knuckle undergoes multi-stage inspection — from raw material verification and dimensional measurement to hardness testing and surface finish checks. Defective parts never leave our facility, which protects your reputation downstream.

Scalable Supply for Bulk Orders

Whether you need 50 pieces or 5,000, our production capacity scales to your demand without sacrificing lead time. We maintain safety stock on high-turnover Sitrak part numbers like the AZ4071418013 to ensure rapid dispatch.

For a comprehensive overview of all Sinotruk Sitrak categories, visit our Sinotruk Sitrak Truck Parts Full Category Guide.

Frequently Asked Questions

What causes a steering knuckle to fail on Sitrak trucks?

Steering knuckles typically fail due to prolonged exposure to excessive road impact, overloading beyond rated axle capacity, or corrosion-related material weakening. Additionally, worn king pin bushings can create uneven stress distribution on the knuckle bore, accelerating fatigue cracks over time. Regular front-axle inspections help catch early warning signs before complete failure occurs.

How do I confirm that AZ4071418013 fits my specific Sitrak model?

The most reliable method is cross-referencing the OEM part number AZ4071418013 against your vehicle’s original parts catalog or VIN-based parts lookup system. If you are uncertain, send us your truck model, year, and chassis number — our technical team will verify compatibility within 24 hours.

Is this steering knuckle sold individually or as a pair?

The AZ4071418013 is a left-side (L) steering knuckle sold individually. If you also require the right-side counterpart, please mention it in your inquiry and we will provide both part numbers with combined pricing.

What is the typical lead time for bulk orders?

For stocked items, we usually ship within 3–7 business days after payment confirmation. For larger custom orders or white-label packaging requests, production typically takes 15–25 days depending on quantity. We always confirm delivery timelines before you commit.

Can I inspect the product quality before placing a large order?

Absolutely. Mettlead welcomes factory visits and on-site inspections. You are also welcome to request sample units for your own quality testing before scaling up your order volume.

Ready to Secure Your Supply?

Getting the right steering knuckle at the right price should not be complicated. Whether you need a single sample or a container load of AZ4071418013 left steering knuckles for your Sitrak fleet, our team is ready to provide a fast, transparent quotation.

Take the next step: Contact Us now with your quantity, destination, and any packaging preferences. We typically respond within 12 hours with pricing, lead time, and shipping options tailored to your needs.