Camshaft Gear 3946436 for Cummins Engine 4B3.9 6B5.9 G8.3 ISB QSB3.9 QSB4.5 QSB5.9 Hyundai Loader HL757-7 HL757TM-7

Product Specifications

Compatible Models

Tired of Timing Gear Failures on Cummins 4B3.9 & Hyundai HL757-7? Get the Right 3946436 Camshaft Gear

A single camshaft gear failure can halt a loader for 3–5 days — costing $2,800+ in lost productivity per day. Many operators report premature wear or misalignment after installing non-certified 3946436 camshaft gears, especially under high-load quarry or port operations. OEM lead times stretch to 22 days, while counterfeit parts lack proper heat treatment and cause secondary damage to timing cases and oil pumps.

OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse

This 3946436 camshaft gear is manufactured in ISO 9001-certified facilities and undergoes full dimensional inspection and tooth-profile verification before shipment. Built for Cummins QSB5.9 camshaft gear applications and Hyundai HL757-7 timing gear replacement, it ensures precise valve timing during continuous digging, lifting, and grading cycles. With 10 years’ experience supplying engine components globally, XUNPO delivers verified aftermarket parts that match OEM performance — no compromises on fit, function, or fatigue resistance.

Where This Part Works

This camshaft gear operates reliably in high-duty-cycle environments: mining haulage loaders, port material handlers, demolition site excavators, and municipal public works fleets. In Hyundai 100D-7 forklifts handling steel coils or Cummins-powered HL757-7 loaders moving crushed aggregate, accurate gear meshing prevents timing drift under sustained 1,800–2,200 RPM operation. Selecting the correct camshaft gear for Hyundai 100D-7 forklift ensures consistent compression timing and avoids catastrophic valve-to-piston contact.

Engineering Details That Matter

Forged 40Cr alloy steel provides superior tensile strength (≥980 MPa) and fatigue resistance over cast alternatives. Full tooth surface hardening (HRC 58–62) maintains precise pitch line engagement across 10,000+ operating hours. Tolerance control at ±0.02 mm ensures zero backlash deviation versus original equipment. Micro-polished gear flank surfaces reduce friction coefficient by 23% compared to standard ground finishes, lowering oil temperature rise during extended shifts. Zinc-nickel plating offers 720-hour salt-spray corrosion resistance — critical for coastal port and offshore marine applications.

The Real Cost of Wrong Parts

A $42 counterfeit camshaft gear may save $18 upfront but often fails within 1,200 hours — triggering $1,450 in labor, $890 in damaged timing case repairs, and $3,200+ in downtime penalties on contracted infrastructure projects. Genuine OEM parts cost 47% more and require 18–26 days lead time. Our 3946436 camshaft gear meets SAE J429 Grade 8.8 mechanical specs and ISO 1328-1 gear accuracy class 6 — delivering optimal total cost of ownership (TCO) over 3+ years. Every unit is tested for runout (<0.03 mm), tooth contact pattern, and dynamic balance before release.

Why Customers Trust XUNPO

Packaging & Shipping

• Individually sealed in anti-rust VCI film, cushioned in custom-molded EPE foam, and packed in double-walled corrugated cartons
• 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
• Minimum order quantity: 1 piece — no bulk requirement for emergency maintenance

Get Your 3946436 Camshaft Gear Now

Your machine isn’t generating revenue while waiting. Send us your part number (3946436), machine model (e.g., Hyundai HL757-7 or Cummins QSB5.9), and required quantity — we’ll email a competitive quote within 24 hours. First-time buyers may request a sample for physical verification before placing bulk orders. Stock is available now; delay means longer downtime.

Frequently Asked Questions