Product Specifications
| Parameter | Details |
|---|
| Part Name | Camshaft Gear |
| Part Number (OEM Reference) | 3946436, J946436, K3946436 |
| Brand Compatibility | Cummins, Hyundai |
| Machine Model Fitment | Cummins engines: 4B3.9, 6B5.9, G8.3, ISB, ISB CM2150, ISB CM550, QSB3.9 30 CM550, QSB4.5 30 CM550, QSB5.9 30 CM550
Hyundai machines: HL757-7, HL757TM-7, 100D-7, 120D-7, 135D-7, 160D-7 |
| Material | High-strength forged steel with precision gear tooth profile |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Packaging | Individual anti-rust packaging with foam cushioning in reinforced corrugated box |
Compatible Models
| Brand | Applicable Models |
|---|
| Cummins | 4B3.9, 6B5.9, G8.3, ISB, ISB CM2150, ISB CM550, QSB3.9 30 CM550, QSB4.5 30 CM550, QSB5.9 30 CM550 |
| Hyundai | HL757-7, HL757TM-7, 100D-7, 120D-7, 135D-7, 160D-7 |
Tired of Camshaft Gear Failures on Cummins QSB5.9 and Hyundai HL757-7 Engines?
Every unscheduled engine shutdown costs operators thousands in downtime — especially during critical mining or port loading cycles. Counterfeit 3946436 camshaft gears often wear prematurely, causing timing misalignment, power loss, and secondary damage to valves and pistons. OEM replacements take weeks to arrive, halting fleet operations across Africa, Southeast Asia, and Latin America.
OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse
This camshaft gear is manufactured in ISO 9001-certified facilities and undergoes full functional testing before shipment — including backlash measurement, tooth contact pattern verification, and rotational torque validation. With 10 years’ experience supplying replacement parts for Cummins and Hyundai loader engines, XUNPO delivers direct-fit performance for QSB5.9 and HL757-7 rebuilds without waiting for factory lead times. Our technical team verifies every part number match before quoting — no guesswork, no mismatched shipments.
Where This Part Works
This camshaft gear operates under high-torque, continuous-duty conditions in construction loaders, quarry articulated haulers, and port material handlers. In Hyundai HL757-7 loaders working 16+ hours daily at container terminals, precise valve timing ensures consistent hydraulic response and fuel efficiency. For Cummins QSB5.9-powered equipment in remote mining sites, gear durability directly affects engine service intervals and field repair reliability — making correct specification non-negotiable.
Engineering Details That Matter
Forged steel construction provides superior tensile strength over cast alternatives, resisting deformation under repeated load cycling. Tooth profile is ground to ±0.02 mm tolerance, ensuring accurate meshing with the crankshaft gear and preventing harmonic vibration. Surface hardness reaches HRC 58–62 after case hardening, extending life beyond 8,000 operating hours in typical loader applications. The hub bore is precision broached to match OEM shaft diameters, eliminating runout and reducing bearing stress. All surfaces receive phosphate coating for corrosion resistance during storage and installation.
The Real Cost of Wrong Parts
A $45 counterfeit camshaft gear may seem economical — until it fails at 3,200 hours, triggering a $2,800 engine teardown, $1,200 labor charge, and $15,000 in delayed project penalties. Genuine aftermarket parts like this 3946436 camshaft gear meet ISO 8573-1 air purity standards for clean assembly environments and conform to SAE J471 tooth geometry specifications. Total cost of ownership drops by 37% over three years when factoring in extended service life, reduced warranty claims, and avoided collateral damage — not just unit price.
Why Customers Trust XUNPO
Only ISO 9001-certified factories supply our camshaft gears — each batch inspected for dimensional compliance and metallurgical integrity. Every unit undergoes pre-shipment performance testing to verify rotational balance and gear engagement accuracy. We offer 3–12 month warranties covering manufacturing defects — no fine print, no exceptions. With 10 years exporting to 120+ countries, our data shows 92% repeat order rate among fleet maintenance managers. Our 20-person engineering support team confirms part compatibility within 2 hours using OEM service manuals and real-time cross-reference databases. Over 10,000 SKUs are held in stock at our Guangzhou warehouse — including this camshaft gear — enabling 2–5 working day dispatch for urgent repairs.
Packaging & Shipping
- Individually sealed in anti-rust VCI paper, cushioned with molded EPE foam, packed in double-walled corrugated cartons rated for 50 kg stacking load
- In-stock items ship within 2–5 working days after payment confirmation
- Flexible logistics: DHL/FedEx/UPS express (3–7 days), air freight (7–12 days), sea freight (25–40 days)
- Real-time tracking provided from Guangzhou warehouse to final destination
- MOQ is 1 piece — designed for emergency repairs and single-engine rebuilds
Get Your Camshaft Gear Now
Your excavator or loader isn’t generating revenue while idle. Send us your machine model, current part number (3946436 or equivalent), and required quantity — we’ll email a competitive quote within 24 hours. First-time buyers can request a sample for physical verification before placing bulk orders. Stock is confirmed daily; no backorders, no delays.
Frequently Asked Questions
Q: Is this an original Cummins or Hyundai part?
A: No — it is an OEM-equivalent aftermarket camshaft gear, produced in ISO 9001-certified factories to match original specifications for fit, form, and function.
Q: How do I confirm this fits my specific engine?
A: Provide your exact machine model (e.g., Hyundai HL757-7) and serial number if available — our technical team will verify compatibility within 2 hours.
Q: What is your warranty policy?
A: 3–12 months coverage against manufacturing defects. If failure occurs due to material or workmanship, we replace free of charge with proof of purchase.
Q: What is the minimum order quantity?
A: 1 piece — no exceptions. Ideal for urgent repairs, pilot testing, or small fleet operators.
Q: How soon can I receive the part after ordering?
A: In-stock items ship within 2–5 working days. Express courier delivery takes 3–7 days depending on destination.
Q: Can I request a sample before placing a bulk order?
A: Yes — first-time customers may request one sample unit for physical evaluation and fit-check prior to full order.
Ready to order or need a quote?
Send your part number, machine model, and quantity — we'll respond within 24 hours.
WhatsApp: +86 187 2205 7128 | Email: talos@xunpojx.com
