Product Features

• Structure: A precision-machined hollow cylindrical pin made from high-strength alloy steel, featuring a hardened and polished surface for exceptional wear resistance and fatigue strength.

• Performance: Transfers the combustion forces from the piston to the connecting rod with high precision. Its hollow design reduces weight while maintaining structural integrity, ensuring smooth operation under high loads and temperatures.

• Design: Directly interchangeable with the original equipment pin, ensuring a precise interference fit with the piston and connecting rod small end.

Core Function

1. Force Transfer: Transmits the high combustion pressure from the piston to the connecting rod, converting linear piston motion into rotational crankshaft motion.

2. Precision Guidance: Maintains the piston’s alignment within the cylinder, reducing friction and wear between the piston and cylinder wall.

3. Durability: The hardened alloy steel construction resists fatigue and wear, ensuring long service life even in harsh operating conditions.

Piston Pin 7N9805 SHANGCHAI – Premium Engine Component for Heavy-Duty Performance

When your fleet depends on SHANGCHAI-powered trucks running at full capacity, every engine component must deliver precision and durability without compromise. The Piston Pin 7N9805 SHANGCHAI from METTLEAD Truck Parts is engineered to meet exact OEM specifications, ensuring seamless fitment, reduced wear, and extended service life in demanding operating conditions. This factory-direct piston pin eliminates the guesswork from your procurement process — delivering consistent quality at a competitive price point that protects your bottom line.

Why the Piston Pin 7N9805 Stands Out in Heavy-Duty Applications

A piston pin may be small in size, but it shoulders enormous responsibility inside the combustion chamber. It serves as the critical link between the piston and the connecting rod, transmitting combustion forces while enduring extreme thermal cycling and mechanical stress. The 7N9805 is purpose-built for SHANGCHAI diesel engines, where reliability is non-negotiable.

Key Features and Benefits

• OEM-Grade Precision: Manufactured to match original SHANGCHAI dimensional tolerances (typically within ±0.005mm), ensuring a perfect interference or clearance fit without additional machining.
• High-Carbon Alloy Steel Construction: Case-hardened surface (HRC 58-62) provides exceptional wear resistance while maintaining a tough, ductile core that absorbs shock loads during combustion cycles.
• Superior Surface Finish: Mirror-polished outer diameter (Ra ≤ 0.4μm) minimizes friction against the piston boss and small-end bearing, reducing heat generation and extending component life.
• Thermal Stability: Engineered to maintain dimensional integrity across operating temperatures ranging from cold start (-30°C) to peak combustion exposure (300°C+).
• Extended Service Intervals: Designed to match or exceed OEM durability benchmarks, reducing unplanned downtime and lowering total cost of ownership for fleet operators.
• Direct Replacement: Drop-in fitment for SHANGCHAI engines — no modifications required, minimizing workshop labor time during overhaul or repair.

Technical Specifications – Piston Pin 7N9805 SHANGCHAI

Application Scenarios – Where the 7N9805 Piston Pin Performs

The Piston Pin 7N9805 SHANGCHAI finds its home in a wide range of heavy-duty vehicles and industrial equipment powered by SHANGCHAI diesel engines. These engines are widely deployed across Chinese truck platforms and exported machinery worldwide.

Typical Vehicle and Equipment Applications

• SHACMAN F3000 / X3000 Series: Long-haul logistics trucks equipped with SHANGCHAI SC11CB engines rely on this piston pin for sustained high-load highway operation.
• XCMG / SDLG / LIUGONG Wheel Loaders: Construction equipment running SHANGCHAI D6114 powerplants demands components that withstand constant torque cycling and dust-heavy environments.
• SANY / ZOOMLION Concrete Mixers: Transit mixer trucks operating in urban construction zones need engine internals that tolerate frequent stop-start thermal stress.
• Marine and Generator Sets: Stationary and marine SHANGCHAI engines running at constant RPM for extended periods benefit from the pin’s fatigue resistance and thermal stability.
• Mining Haul Trucks: Off-road vehicles operating under extreme payload conditions where engine component failure means costly production shutdowns.

Whether your customer operates a fleet of highway tractors or a fleet of construction loaders, the 7N9805 piston pin delivers the reliability that keeps machines earning revenue instead of sitting in the workshop.

OEM/ODM Capability – Tailored to Your Market

METTLEAD Truck Parts understands that different markets have different requirements. Our manufacturing partners maintain flexible production lines that accommodate your specific needs:

• White-Label Packaging: Receive the Piston Pin 7N9805 in neutral packaging, ready for your own brand identity — ideal for distributors building regional brand equity.
• Custom Packaging and Labeling: Full custom box design, hologram stickers, QR code traceability, and multilingual documentation available for volume orders.
• Strict Quality Control: Every batch undergoes dimensional inspection, hardness testing, and surface finish verification before shipment. Inspection reports available upon request.
• Flexible Order Quantities: Whether you need 50 pieces for a trial order or 5,000 pieces for quarterly stock replenishment, we scale to match your procurement cycle.
• Factory Visit Welcome: We invite procurement teams to inspect production facilities, audit quality processes, and build long-term supply chain confidence in person.

Explore our full range of SHANGCHAI engine parts to consolidate your sourcing and reduce logistics costs.

Frequently Asked Questions – Piston Pin 7N9805 SHANGCHAI

What engines does the Piston Pin 7N9805 fit?

The 7N9805 piston pin is designed for SHANGCHAI diesel engine series including the C6121, SC11CB, and D6114 platforms. These engines power a variety of trucks, loaders, and industrial equipment. Always cross-reference your engine serial number to confirm compatibility before ordering.

How does this piston pin compare to the original SHANGCHAI part?

This piston pin is manufactured to OEM-equivalent specifications — same material grade, same heat treatment process, same dimensional tolerances. It functions as a direct drop-in replacement. The difference is our factory-direct pricing, which typically offers 20–40% savings compared to original branded parts without sacrificing performance.

What causes piston pin failure, and how does the 7N9805 prevent it?

Common failure modes include surface wear from inadequate lubrication, fatigue cracking from thermal cycling, and seizure from incorrect clearance. The 7N9805 combats these through deep case-hardening for wear resistance, a ductile core for fatigue absorption, and precision grinding that ensures proper oil film formation at the pin-boss interface.

Can I order a sample of the Piston Pin 7N9805 before committing to volume?

Yes. We encourage sample orders so your engineering team can verify fitment, finish quality, and dimensional accuracy before scaling up. Sample lead times are typically 3–5 business days from stock.

What is the recommended replacement interval for this piston pin?

Under normal operating conditions with proper lubrication and cooling system maintenance, the 7N9805 piston pin is designed to last through a full engine overhaul cycle — typically 300,000–500,000 km for highway trucks or 8,000–12,000 operating hours for construction equipment. Replace during major overhaul or if inspection reveals measurable wear beyond service limits.

How should I store piston pins before installation?

Store in a dry, temperature-stable environment in their original protective packaging. Avoid stacking heavy items on top of the pins. Apply a light film of anti-corrosion oil if long-term storage (6+ months) is anticipated. The precision-ground surface is vulnerable to corrosion pitting if exposed to moisture.

Ready to Secure Your Supply of Piston Pin 7N9805 SHANGCHAI?

Your engines deserve components that work as hard as your business does. The Piston Pin 7N9805 SHANGCHAI delivers OEM-level precision at factory-direct pricing — backed by strict quality control and flexible logistics that respect your timeline.

Take the next step: Contact our parts specialists today with your required quantity, destination port, and any packaging preferences. We typically respond within 12 hours with a detailed quotation including FOB/CIF pricing, lead time, and available payment terms.

METTLEAD Truck Parts — Your factory-direct source for SHANGCHAI engine components, delivered worldwide with the quality and speed your fleet demands.