Product Introduction

This precision-machined splined gasket is a critical component for fine-tuning the position of internal transmission parts.

• Structure & Material: Made from high-strength alloy steel, it features an internal spline profile that matches the transmission’s splined shafts, with a flat, uniform thickness. The surface is precision-ground for accuracy and corrosion resistance.

• Performance: The precisely controlled thickness allows for accurate axial adjustment, ensuring proper gear meshing and preventing excessive endplay or preload. The splined inner diameter ensures it locks securely onto the shaft without slipping.

• Durability: The hardened steel construction withstands high torque loads and friction, maintaining its shape and precision over time.

Core Function

1. Precision Adjustment: Fine-tunes the axial position of splined components to ensure optimal gear meshing and bearing preload.

2. Endplay Control: Prevents excessive movement of gears and shafts, which can cause noise, vibration, and premature wear.

3. Secure Fit: The internal splines lock the gasket onto the shaft, ensuring it stays in place under high torque loads.

Spline Adjustment Gasket WG2210040021 – SINOTRUK HW Series Gearbox Parts

When your SINOTRUK HW series gearbox demands precision, the Spline Adjustment Gasket WG2210040021 delivers exactly that. This critical transmission component ensures proper spline clearance and smooth gear engagement, helping heavy-duty trucks maintain peak drivetrain performance over hundreds of thousands of kilometers. As a factory-direct supplier, Mettlead offers wholesale distributors genuine-quality gaskets at competitive pricing — so you can protect your margins while keeping your customers on the road.

Whether you are restocking your warehouse or fulfilling a bulk order for fleet operators, this SINOTRUK HW gearbox spline adjustment gasket is engineered to meet OEM dimensional tolerances and material specifications. Read on to discover why distributors across Africa, Southeast Asia, and the Middle East trust Mettlead as their go-to source for SINOTRUK HOWO truck parts.

Key Features and Benefits of Spline Adjustment Gasket WG2210040021

This gasket does far more than simply fill a gap. It actively regulates axial play within the spline assembly, preventing premature wear on mating gears and shafts. Here is what makes it stand out:

• Precision-Machined Thickness: Manufactured to tight dimensional tolerances, ensuring accurate spline clearance adjustment in the HW series gearbox.
• High-Grade Material: Made from wear-resistant alloy steel that withstands continuous torque loads and thermal cycling inside the transmission housing.
• OEM-Equivalent Fitment: Direct replacement for SINOTRUK original part number WG2210040021 — no modification required during installation.
• Extended Service Life: Surface-hardened finish reduces friction and resists pitting, helping fleets avoid costly unscheduled downtime.
• Wholesale-Ready Packaging: Available in bulk quantities with white-label or custom packaging options to suit your brand identity.

In other words, when you stock this spline adjustment gasket, you are offering your end customers a reliable, cost-effective solution that keeps SINOTRUK heavy trucks shifting smoothly under the toughest conditions.

Technical Specifications

Application Scenarios

The Spline Adjustment Gasket WG2210040021 is specifically designed for the SINOTRUK HW series manual transmission. It sits within the spline assembly to regulate axial clearance between gears and the output shaft. Over time, normal wear increases this clearance, leading to gear noise, imprecise shifting, and accelerated component degradation.

This gasket is commonly needed during:

• Scheduled gearbox overhauls on HOWO A7, HOWO T7H, and SITRAK C7H trucks.
• Fleet maintenance programs where HW19710 or HW20716 transmissions reach mid-life service intervals.
• Post-failure rebuilds where excessive spline play has caused secondary damage to synchronizer rings or shift forks.

Compatible vehicle models include SINOTRUK HOWO 6×4 tractor heads, 8×4 dump trucks, and SITRAK heavy-haul models equipped with HW series gearboxes. For a complete range of transmission components, explore our dedicated gearbox parts category and our SINOTRUK HOWO gearbox parts page.

OEM/ODM Capability

Mettlead understands that wholesale distributors need more than just parts — they need a supply partner who adapts to their business model. That is exactly what we offer:

• White-Label Packaging: We ship Spline Adjustment Gasket WG2210040021 under your own brand, complete with your logo, part labels, and barcode requirements.
• Custom Packaging Solutions: From individual poly bags to branded cartons, we configure packaging to match your market’s expectations.
• Strict Quality Control: Every batch undergoes dimensional inspection, hardness testing, and surface finish checks before dispatch.
• Flexible MOQ: Whether you need a trial order or container-load quantities, we structure pricing tiers that protect your profit margins.
• Factory Visit Welcome: We invite potential partners to inspect our production facilities, warehousing, and QC processes firsthand.

In short, we handle the manufacturing complexity so you can focus on growing your distribution network.

Customer Case Study

A truck parts distributor based in East Africa was struggling to source consistent-quality Spline Adjustment Gasket WG2210040021 for their fleet maintenance clients. Previously, inconsistent thickness tolerances from other suppliers had led to repeated gearbox noise complaints and warranty returns.

After switching to Mettlead as their primary supplier of SINOTRUK HW series gearbox spline adjustment gaskets, they reported a significant drop in return rates within the first six months. The precision-machined WG2210040021 gaskets met OEM specs consistently, which meant fewer callbacks from workshop customers and stronger repeat orders.

Moreover, by leveraging our white-label packaging service, this distributor was able to build brand recognition in their local market — all while enjoying factory-direct pricing on every shipment of Spline Adjustment Gasket WG2210040021 and related SINOTRUK HOWO truck spare parts.

Frequently Asked Questions

What is the function of Spline Adjustment Gasket WG2210040021 in the HW gearbox?

This gasket regulates the axial clearance within the spline assembly of the SINOTRUK HW series gearbox. By maintaining precise clearance, it prevents excessive play between gears and the transmission shaft, which in turn reduces gear noise and protects synchronizer components from premature wear.

Which gearbox models does WG2210040021 fit?

The Spline Adjustment Gasket WG2210040021 is designed for SINOTRUK HW series transmissions, including HW19710, HW15710, HW20716, and related variants commonly found in HOWO and SITRAK heavy trucks.

How do I know when this spline adjustment gasket needs replacing?

Typical signs include increased gear noise during shifting, a noticeable clunk when engaging gears, or play detected during a gearbox inspection. Technicians usually measure spline axial clearance with a feeler gauge during overhauls — if it exceeds the factory-specified tolerance, gasket replacement is necessary.

Is this gasket sold in different thickness options?

SINOTRUK HW gearboxes often use a range of adjustment gasket thicknesses to achieve the correct spline clearance. Please provide your required specifications when you inquire, and our team will confirm availability across different thickness grades for part number WG2210040021.

What quality controls does Mettlead apply to this part?

Each production batch of Spline Adjustment Gasket WG2210040021 undergoes dimensional measurement, Rockwell hardness testing, and visual surface inspection. We maintain traceability records so that any batch can be verified against its inspection data.

Get Your Wholesale Quote Today

Ready to secure factory-direct pricing on Spline Adjustment Gasket WG2210040021 for your SINOTRUK HW gearbox parts inventory? Mettlead makes it simple: competitive unit costs, flexible order quantities, reliable delivery timelines, and the quality your customers expect.

Take the next step — contact us now with your required quantity and packaging preferences. Our team typically responds within 24 hours with a detailed quotation tailored to your market.