Product Introduction

• Structure: A precision-machined spur gear made from high-strength alloy steel, with a hardened tooth surface for wear resistance. It features a splined center bore for secure mounting, two locating holes for precise alignment, and a balanced design to minimize vibration.

• Performance: Transmits rotational torque smoothly and efficiently, ensuring the oil pump maintains consistent pressure across all engine operating conditions. The hardened teeth and robust construction withstand high loads and provide long service life even in harsh environments.

Core Function

1. Power Transmission: Transfers mechanical power from the engine’s crankshaft to the high-pressure oil pump, driving its internal gears to generate oil pressure.

2. Precision Timing: Maintains accurate gear meshing to ensure the oil pump operates in perfect synchronization with the engine, providing a continuous and stable oil supply.

High Pressure Oil Pump Transmission Gear 6105Q-3509011 Yuchai – OEM-Grade Replacement for Peak Engine Performance

When your high pressure oil pump loses timing precision, the entire lubrication circuit suffers — and engine failure follows fast. The High Pressure Oil Pump Transmission Gear 6105Q-3509011 Yuchai is purpose-built to maintain flawless power transfer between the crankshaft and oil pump assembly, ensuring consistent oil pressure across all operating conditions. Manufactured to OEM dimensional tolerances and surface hardness standards, this gear keeps your Yuchai-powered fleet moving without unscheduled downtime.

METTLEAD Truck Parts supplies this component direct from quality-controlled production lines in China, delivering factory pricing without sacrificing the material integrity your engines demand.

Key Functions and Benefits of the 6105Q-3509011 Transmission Gear

Precision Power Transfer

This transmission gear sits at the heart of the high pressure oil pump drive train. Its helical tooth profile ensures smooth, low-vibration engagement with the crankshaft timing gear, translating rotational energy into consistent pump actuation. Every tooth is cut to exact involute geometry, minimizing backlash and preventing oil pressure fluctuations that accelerate bearing wear.

Superior Material Durability

Forged from 20CrMnTi alloy steel and carburized to achieve a surface hardness of HRC 58-62, this gear resists pitting, spalling, and abrasive wear under sustained high-load conditions. The hardened case depth of 0.8–1.2 mm protects against fatigue cracking while the tough core absorbs shock loads during cold starts and sudden throttle changes.

Direct Replacement, Zero Modification

The 6105Q-3509011 drops directly into the existing pump housing without machining, shimming, or adapter plates. Bolt patterns, shaft bore tolerances, and gear width match OEM assembly drawings precisely — reducing your workshop turnaround from hours to minutes.

Fleet Uptime Protection

• Eliminates oil pressure loss caused by worn gear teeth
• Prevents cascading damage to camshaft bearings and piston cooling jets
• Reduces maintenance intervals by delivering consistent pump speed ratios
• Supports continuous operation across temperature ranges from -30°C to +120°C

Technical Specifications

Application Scenario: Yuchai-Powered Heavy-Duty Trucks

The High Pressure Oil Pump Transmission Gear 6105Q-3509011 serves as the critical mechanical link between the engine’s timing gear train and the high pressure oil pump rotor assembly. It converts crankshaft rotational motion into precise pump drive speed, maintaining the oil pressure gradient that protects every friction surface inside the engine block.

This gear is engineered specifically for the Yuchai YC6105Q and YC6108 series diesel engines — workhorses found across Chinese domestic and export-market commercial vehicles. These powertrains are commonly fitted in:

• Dongfeng medium and heavy-duty logistics trucks
• Foton Auman regional distribution vehicles
• JAC construction-site dump trucks
• Yutong and King Long bus platforms with Yuchai diesel power
• Various agricultural and industrial machinery applications

In fleet operations across Southeast Asia, Africa, and the Middle East, these Yuchai engines routinely clock 300,000+ km before major overhaul. The oil pump transmission gear must survive that entire interval without measurable tooth degradation — and the 6105Q-3509011 is heat-treated and finished to do exactly that.

OEM/ODM Capabilities

White-Label and Custom Packaging

METTLEAD offers full white-label packaging services for distributors and aftermarket brands building their own product lines. Your company logo, part numbering system, and brand identity go on every box — our factory stays invisible to your end customers.

Strict Quality Control Process

1. Raw Material Inspection — Spectrographic analysis verifies alloy composition before forging
2. Dimensional Verification — CMM (Coordinate Measuring Machine) checks on bore diameter, tooth pitch, and gear width
3. Hardness Testing — Rockwell and Vickers testing at multiple points per batch
4. Magnetic Particle Inspection — Detects sub-surface cracks before packaging
5. Final Assembly Fit Test — Random samples matched against OEM pump housings

Flexible Order Terms

• Competitive MOQ structure for first-time buyers
• Mixed container orders across the full Yuchai engine parts catalog
• Secure payment via T/T, L/C, and trade assurance platforms
• Factory visit and on-site inspection welcomed

Customer Case Study: Fleet Overhaul for East African Logistics Company

A Kenyan fleet operator managing 120+ Dongfeng trucks powered by Yuchai YC6108 engines experienced recurring oil pressure warnings across multiple units between 180,000 and 220,000 km. Root cause analysis traced the failures to worn high pressure oil pump transmission gears with visible pitting on the drive flanks.

After sourcing the 6105Q-3509011 High Pressure Oil Pump Transmission Gear through METTLEAD, the operator replaced gears across 45 trucks during scheduled maintenance windows. Post-replacement monitoring over 8 months showed:

• Zero oil pressure fault codes across all 45 units
• 12% reduction in unplanned maintenance events fleet-wide
• Consistent oil pressure readings of 0.35–0.45 MPa at idle across ambient temperature ranges of 15°C–42°C
• Cost savings of approximately 35% versus sourcing through regional OEM dealers

The operator has since expanded procurement to include timing gears, oil pump assemblies, and piston ring sets from the METTLEAD Yuchai engine components range.

Frequently Asked Questions About the 6105Q-3509011 High Pressure Oil Pump Transmission Gear

What symptoms indicate the oil pump transmission gear needs replacement?

Low oil pressure warnings at idle, metallic debris in the oil filter, and audible gear whine from the front cover area all point toward transmission gear wear. If oil pressure drops below 0.25 MPa at operating temperature, the gear’s tooth profile has likely degraded beyond acceptable limits and the 6105Q-3509011 high pressure oil pump transmission gear should be inspected immediately.

Is this gear compatible with both YC6105Q and YC6108 engine variants?

Yes. The 6105Q-3509011 is the factory-specified oil pump drive gear for both the YC6105Q and YC6108 series engines. Dimensional and spline specifications remain identical across these variants, ensuring direct interchangeability without modification.

What is the expected service life of this transmission gear?

Under normal operating conditions with proper oil quality maintenance (oil changes per Yuchai-recommended intervals), the carburized 20CrMnTi construction supports service life matching the engine’s major overhaul interval — typically 250,000 to 350,000 km in heavy-duty commercial applications.

Does the gear require break-in procedures after installation?

No special break-in is necessary. However, best practice recommends running the engine at low idle for 3–5 minutes after installation to allow the lubrication circuit to fully prime and coat the new gear mesh surfaces before applying load.

Can I order this high pressure oil pump transmission gear with my own brand packaging?

Absolutely. METTLEAD supports full white-label packaging including custom part numbers, brand logos, QR-coded traceability labels, and multilingual installation guides. Minimum quantities for custom packaging apply — reach out for specific thresholds.

How is quality verified before shipment?

Every production batch of the 6105Q-3509011 gear undergoes five-stage quality control: material composition testing, CNC dimensional verification, hardness profiling, magnetic particle inspection for sub-surface defects, and random-sample fitment testing in OEM pump housings.

Ready to Secure Your Supply of 6105Q-3509011 Transmission Gears?

Your engines deserve components that perform identically to factory originals — at pricing that protects your margins. The High Pressure Oil Pump Transmission Gear 6105Q-3509011 Yuchai delivers exactly that: OEM-grade metallurgy, precision finishing, and batch-tested reliability shipped direct from our quality-controlled production facility.

Get your competitive quote today. Share your required quantity, preferred packaging, and delivery destination — our team typically responds within 12 business hours with full pricing and lead time confirmation.

👉 Contact METTLEAD Truck Parts Now to request pricing and availability for the 6105Q-3509011 High Pressure Oil Pump Transmission Gear.

Browse our complete inventory of Yuchai engine replacement parts — from oil pumps and timing components to piston assemblies and gasket kits — in the Yuchai Engine Parts Category.