Product Introduction

This washer is a critical component for maintaining the performance and longevity of the planetary gear system

• Structure & Material: Manufactured from high-strength hardened steel, with a precision-ground flat surface to ensure uniform thickness and minimal friction.

• Precision Fit: The washer is engineered to precise dimensional tolerances, ensuring it fills the axial clearance between the planetary gear and carrier, preventing excessive endplay.

• Wear Resistance: The hardened steel construction resists wear under high rotational speeds and heavy loads, maintaining consistent performance over time.

• Compatibility: Direct OE replacement, fully matching the thickness and dimensional specifications of the HW19710 transmission planetary gear set.

Core Function

1. Axial Clearance Control: Eliminates excessive endplay between the planetary gears and carrier, ensuring stable meshing with the sun gear and ring gear.

2. Friction Reduction: Provides a smooth, low-friction surface between moving components, minimizing heat generation and power loss.

3. Wear Protection: Distributes contact pressure evenly, preventing localized wear on the planetary gear and carrier surfaces.

Planetary Gear Washer WG2229100008 – SINOTRUK HW Series Gearbox Spare Part

OEM-Quality Planetary Gear Washer WG2229100008 for SINOTRUK HW Gearbox

When your SINOTRUK HW series gearbox demands precision, every single component matters — especially the planetary gear washer. The Planetary Gear Washer WG2229100008 plays a critical role in reducing friction, distributing thrust loads evenly, and ensuring smooth rotation of the planetary gear assembly. Without a reliable washer in place, premature wear and costly gearbox failures become inevitable.

At Mettlead, we supply this genuine-spec WG2229100008 planetary gear washer directly from our factory in China, which means you get consistent OEM-grade quality at a price that protects your margins. Whether you are a parts distributor in Africa, a fleet maintenance operator in Southeast Asia, or a wholesale agent in the Middle East, this is the gearbox component your customers depend on.

Explore our full range of SINOTRUK HOWO truck parts or browse all gearbox components available for immediate order.

Key Features and Benefits of WG2229100008 Planetary Gear Washer

This isn’t just a flat piece of metal sitting inside your gearbox — it’s an engineered component that keeps the entire planetary gear set running the way it should. Here’s what sets the Planetary Gear Washer WG2229100008 apart:

• Precision-Machined Dimensions: Manufactured to exact OEM tolerances, ensuring a perfect fit within the SINOTRUK HW series gearbox housing without any modification.
• High-Grade Material Composition: Made from hardened alloy steel that resists deformation under sustained thermal and mechanical loads, extending service life significantly.
• Superior Surface Finish: The washer’s polished contact surfaces minimize friction between the planetary gear and carrier, reducing heat buildup and improving transmission efficiency.
• Thrust Load Distribution: Engineered to evenly distribute axial thrust forces across the gear assembly, preventing localized stress concentrations that lead to pitting or cracking.
• Wholesale-Ready Packaging: Available in bulk quantities with optional white-label or custom packaging — ideal for distributors building their own brand in the aftermarket.
• Cost Advantage: Factory-direct pricing from China eliminates middlemen, giving you stronger profit margins on every unit sold.

In short, this washer does its job quietly and reliably, so your customers’ gearboxes keep shifting smoothly mile after mile.

Technical Specifications

Accurate specifications matter when you’re sourcing gearbox parts for heavy-duty trucks. Below you’ll find the detailed parameters of the WG2229100008 Planetary Gear Washer:

Parameter	Details
Part Number	WG2229100008
Part Name	Planetary Gear Washer
Applicable Gearbox	SINOTRUK HW Series (HW15710, HW19710, HW25716, etc.)
Material	Hardened Alloy Steel
Surface Treatment	Precision Ground & Polished
Hardness	HRC 58–62
Function	Thrust load distribution & friction reduction in planetary gear set
OEM Compatibility	100% interchangeable with original SINOTRUK part
Brand	Mettlead (White-label available)
Origin	China
Packaging	Neutral / Custom / OEM-style packaging
MOQ	Contact for wholesale quantity pricing

Need the full technical drawing or cross-reference data? Contact our engineering team and we’ll send it within 24 hours.

Application Scenarios — Where Does WG2229100008 Fit?

The Planetary Gear Washer WG2229100008 is specifically designed for the planetary gear mechanism inside SINOTRUK HW series transmissions. Here’s exactly where and how this component is used:

Compatible Gearbox Models

• SINOTRUK HW15710 Transmission
• SINOTRUK HW19710 Transmission
• SINOTRUK HW25716 Transmission
• Other HW series variants utilizing the same planetary gear assembly

Applicable Vehicle Models

• SINOTRUK HOWO A7 Heavy-Duty Truck
• SINOTRUK HOWO T7H Tractor Unit
• SINOTRUK SITRAK C7H Series
• SINOTRUK HOWO 371/375/380 HP Models
• Other vehicles equipped with HW series gearboxes

Functional Role in the Gearbox

Inside the HW gearbox, the planetary gear set handles torque multiplication and speed reduction. The WG2229100008 washer sits between the planetary gears and the carrier plate, absorbing axial thrust and preventing metal-to-metal contact. When this washer wears out or fails, the gearbox will exhibit noisy operation, increased shifting resistance, and eventually catastrophic gear damage.

For the complete catalog of SINOTRUK HOWO gearbox parts, visit our dedicated category page.

OEM/ODM Capability — Built for Wholesale Partners

Mettlead understands that as a distributor or agent, you need more than just a good product — you need a supply partner who adapts to your business model. That’s precisely what we offer:

• White-Label Packaging: We can ship the Planetary Gear Washer WG2229100008 in neutral boxes or with your company branding printed directly on the packaging — no minimum design fees.
• Custom Packaging Solutions: Need blister packs, labeled poly bags, or branded cartons? Our packaging team handles it all in-house.
• Strict Quality Control: Every batch undergoes dimensional inspection, hardness testing, and surface quality checks before leaving our warehouse. We maintain less than 0.3% defect rate across all gearbox components.
• Flexible MOQ: Whether you’re testing a new market with a small trial order or stocking up for high-volume distribution, we offer tiered pricing that rewards larger quantities.
• Fast Turnaround: Most standard gearbox parts including WG2229100008 are in stock and ready to ship within 3–5 business days.
• Secure Payment Options: We accept T/T, L/C, Western Union, and trade assurance — whatever keeps your procurement team comfortable.

We also welcome factory visits. If you’re in China or planning a sourcing trip, our doors are open for inspection at any time.

Customer Case Study — WG2229100008 Planetary Gear Washer in Action

Earlier this year, a truck parts distributor based in Lagos, Nigeria reached out to Mettlead with an urgent request. Their local workshop clients were reporting frequent gearbox noise and premature shifting failures in SINOTRUK HOWO A7 trucks. After careful diagnosis, the root cause pointed directly to worn-out planetary gear washers inside the HW19710 gearbox.

The distributor ordered an initial batch of 500 pieces of the Planetary Gear Washer WG2229100008 from our factory. Within 7 days, the shipment arrived at Lagos port. Once their workshop clients installed the new washers, gearbox performance returned to factory specification — smooth shifting, reduced noise, and significantly extended maintenance intervals.

Impressed by the quality and pricing, this customer has since placed three repeat orders totaling over 2,000 units of WG2229100008. Moreover, they expanded their catalog to include additional gearbox spare parts from Mettlead, building a more complete product offering for their local market.

“The WG2229100008 washers from Mettlead are indistinguishable from OEM. Our customers stopped complaining about gearbox issues, and our reorder rate speaks for itself.” — Wholesale Partner, Lagos, Nigeria

Frequently Asked Questions — Planetary Gear Washer WG2229100008

What is the exact function of the Planetary Gear Washer WG2229100008 inside the gearbox?

The WG2229100008 washer acts as a thrust bearing surface between the planetary gears and the carrier assembly in the SINOTRUK HW series gearbox. Its primary job is to reduce friction, distribute axial loads evenly, and prevent direct metal contact that would otherwise cause rapid wear and overheating. Think of it as a protective barrier that keeps the gears spinning freely under heavy torque.

How do I know when the Planetary Gear Washer WG2229100008 needs replacement?

Several symptoms indicate a worn planetary gear washer: abnormal grinding or whining noise from the gearbox during gear engagement, increased resistance when shifting between gears, metal particles found in the transmission oil during routine fluid changes, and in severe cases, visible scoring on the planetary gear surfaces. If any of these signs appear, replacing the WG2229100008 washer promptly can prevent far more expensive gear assembly damage.

Is this WG2229100008 washer identical to the original SINOTRUK OEM part?

Yes. The Planetary Gear Washer WG2229100008 supplied by Mettlead is manufactured to the same dimensional tolerances, material specifications, and hardness standards as the original equipment part. It is a direct drop-in replacement — no machining, shimming, or modification is required during installation.

What material is the WG2229100008 Planetary Gear Washer made from?

This washer is manufactured from hardened alloy steel with a surface hardness of HRC 58–62. The material is chosen specifically for its resistance to wear, thermal stability under high-load conditions, and ability to maintain dimensional accuracy over extended service intervals.

Can I order WG2229100008 with my own brand packaging?

Absolutely. Mettlead offers full white-label and custom packaging services for the Planetary Gear Washer WG2229100008. You can supply your own artwork, or our design team can help you create professional packaging that matches your brand identity. This is especially popular among distributors building their aftermarket brand in competitive regions.

What is the typical lead time for bulk orders of WG2229100008?

For standard stock quantities, the Planetary Gear Washer WG2229100008 ships within 3–5 business days. For larger wholesale orders or custom-packaged batches, lead time is typically 7–15 days depending on volume. We always confirm exact delivery timelines before you place your order.

Ready to Stock the Planetary Gear Washer WG2229100008?

Your customers need reliable gearbox parts, and you need a supplier who delivers consistent quality at prices that protect your bottom line. The Planetary Gear Washer WG2229100008 for SINOTRUK HW Series Gearbox is in stock and ready to ship — with flexible MOQs, white-label options, and wholesale pricing built for serious distributors.

Take the next step today:

• Request your wholesale quote with volume-based pricing
• Ask about custom packaging for your brand
• Get the full technical datasheet and cross-reference list

Contact Mettlead now — our team typically responds within 12 hours with pricing and availability. Let’s build a supply partnership that keeps your inventory full and your customers satisfied.

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