Rocker Arm Assembly 3052170/3047479 for Cummins NT855 N14 & John Deere 6810/6910 Engines

Product Specifications

Compatible Models

Tired of Engine Misfires and Unexpected Downtime? Get the Right Rocker Arm Assembly 3052170 for Your Cummins NT855 N14 or John Deere 6810/6910

Every hour your engine sits idle due to a failed rocker arm costs hundreds — even thousands — in lost productivity. Counterfeit or low-tolerance rocker arms cause valve train noise, poor combustion, and premature camshaft wear. OEM replacements take weeks to arrive, while generic parts often fail within 500 operating hours. You need reliability you can count on — today.

OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse

This rocker arm assembly is manufactured in ISO 9001-certified facilities under strict dimensional and metallurgical controls. Each unit undergoes pre-shipment functional testing for pivot rotation resistance, surface hardness, and load-bearing integrity. Designed specifically for high-duty-cycle applications like continuous excavation, agricultural harvesting, and quarrying, it delivers consistent valve timing and pressure control across full RPM range. With 10 years’ experience supplying replacement engine components to repair centers in North America, Africa, and Southeast Asia, XUNPO ensures compatibility and performance — not just part numbers.

Where This Part Works

This rocker arm assembly operates under extreme thermal cycling and mechanical stress in Tier 2 and Tier 3 off-highway engines. It’s routinely installed in construction equipment working 12+ hours daily on job sites in desert climates, humid tropical ports, and freezing northern mines. In John Deere 6810 tractors and Cummins N14-powered excavators, precise rocker geometry maintains critical valve lash clearance — preventing burnt valves, dropped seats, and cylinder head damage. That’s why selecting a certified replacement rocker arm for 6810 6910 or Cummins NT855 N14 is non-negotiable for uptime-critical operations.

Engineering Details That Matter

Forged 42CrMo alloy steel provides superior fatigue resistance over cast alternatives — essential for engines running at sustained 2,100 RPM. Surface hardness is maintained at HRC 52–56 after quench-and-temper treatment, ensuring long service life under repeated impact loading. The roller tip features precision-ground radius and hardened bearing surface (HRC 60+) to minimize friction and wear against the valve stem. All dimensions conform to Cummins Engineering Drawing 3052170 Rev. C — including bore tolerance (±0.005 mm), pivot centerline alignment (≤0.02 mm deviation), and overall length (178.2 ±0.1 mm). Zinc-nickel plating (15 µm thick) meets ASTM B633 SC4 corrosion resistance requirements for marine and coastal environments.

The Real Cost of Wrong Parts

A $42 counterfeit rocker arm may save $18 upfront — but causes misfire-induced piston scoring within 200 hours, triggering a $3,200 cylinder head rebuild. Incorrect geometry leads to excessive valve guide wear, requiring replacement every 800 hours instead of 4,000+. OEM-equivalent parts like this 3052170 rocker arm assembly reduce total cost of ownership (TCO) by extending overhaul intervals, cutting unplanned downtime by up to 65%, and avoiding secondary damage. Per ISO 8573-1 and Cummins TSB 0037-15, incorrect valve train components directly compromise emissions compliance and torque delivery — making specification accuracy a regulatory and operational priority.

Why Customers Trust XUNPO

Packaging & Shipping

• Individually sealed in anti-static polybag with molded EPE foam cradle inside reinforced corrugated carton
• In-stock items ship within 2–5 working days after order confirmation
• Flexible logistics: Express (DHL/FedEx/UPS), air freight, or sea freight — all with real-time tracking
• Full shipment visibility from Guangzhou warehouse to your dock or workshop
• MOQ is 1 piece — ideal for urgent field repairs or diagnostic validation

Get Your Rocker Arm Assembly Now

Your engine shouldn’t wait. Send us your part number (3052170 or 3047479), machine model (e.g., John Deere 6810 or Cummins N14), and required quantity — we’ll email a competitive quote within 24 hours. First-time buyers may request a sample for physical verification before bulk ordering. Every day delayed means more downtime. Let’s get your engine back online — fast.

Frequently Asked Questions