Cummins 4B3.9-Compatible Camshaft Gear 3946436 – MOQ 1pc

Ready to Ship — Camshaft Gear 3946436 sitting in our Guangzhou warehouse, one piece minimum, dispatched the day your machine model or part number is verified.

Technical Specifications

Application Suitability

What Happens When a Camshaft Gear 3946436 Replacement in Stock Is Not Available

Your loader sits idle while a three-week OEM lead time ticks by.

A wheel loader down on a quarry face or port terminal loses productive hours every single day. The camshaft gear is buried behind the timing cover, which means the engine is already partially stripped before you even confirm the part number. When the confirmed replacement is weeks away, the machine occupies a bay, the mechanic moves to other jobs, and the site runs short one loader. I have watched contractors lose entire shift cycles because a single gear identification took too long. [NEED_CITE: unplanned equipment downtime cost per hour for wheel loaders in aggregate operations]

How We Confirm Your Gear Before Dispatch

Getting the right Camshaft Gear 3946436 replacement in stock to your site starts with fast identification. Send us the part number stamped on the old gear, a photo of the engine nameplate, or even a shot of the machine data tag when the gear itself is too worn to read. Our Guangzhou team cross-checks the number against Cummins 4B3.9, 6B5.9, and QSB5.9 engine serial ranges and Hyundai HL757-7 through HL757TM-7 applications. Confirmation typically comes back within two hours during business hours, so you know whether the gear fits before you commit. One piece ships — no minimum order threshold blocking an emergency single-unit purchase.

Arrival Timeline and What Controls It

Once the Camshaft Gear 3946436 replacement in stock is confirmed and your order is placed, the clock shifts to logistics. The gear leaves our Guangzhou warehouse packed in VCI anti-corrosion film, custom-cut EPE foam, and a double-wall carton rated for courier handling. Express air services reach most major global hubs within a week, while standard air freight typically adds a few days. Sea freight remains an option for non-critical restocking. Tracking numbers go out the same day the parcel is handed to the carrier, and we follow up to confirm delivery at your workshop door. [NEED_CITE: international express freight transit benchmarks for automotive and heavy equipment parts]

Reading the Specs That Matter on the Shop Floor

The 40Cr alloy steel body gives this camshaft gear the core hardness and fatigue strength needed to transmit timing loads across thousands of operating hours without tooth root cracking. Zinc-nickel plating provides corrosion resistance during storage and in humid operating environments, protecting the tooth flanks before the engine oil film takes over. ISO 1328-1 class 6 gear accuracy keeps the involute profile tight enough to maintain correct valve timing on the 4B3.9 and 6B5.9 platforms, preventing the slight timing drift that causes rough combustion and elevated exhaust temperatures. SAE J429 Grade 8.8 fastener compatibility means the retaining hardware torques to the same specification the engine builder expects. [NEED_CITE: gear accuracy class influence on valve timing stability in medium-duty diesel engines]

The Cost of Getting the Wrong Gear Shipped

Shipping an incorrect camshaft gear means the timing cover comes off twice. The mechanic discovers the mismatch only when the gear refuses to seat on the camshaft journal or the tooth count throws the valve events out of phase. The machine stays down while the return ships back and the correct unit travels out. In the worst cases, a gear that physically fits but carries the wrong tooth profile or module causes accelerated wear on the mating idler, turning a single-gear replacement into a full timing gear train overhaul. That second teardown doubles labor cost and extends the outage by days. [NEED_CITE: consequences of incorrect timing gear installation in diesel engine rebuilds]

Why Buyers Source This Gear Here

Our Guangzhou warehouse keeps the Camshaft Gear 3946436 on the shelf so a single unit can ship the same day it is ordered. Part identification works from a stamped number, a machine model, or a nameplate photograph — whichever is readable on your end. Every gear carries the same warranty terms whether it comes from our own production line or a qualified ISO 9001 manufacturing partner, so you deal with one account and one set of terms. Cross-reference numbers including superseded references are verified before dispatch, reducing the chance of a fitment surprise. The MOQ of one piece means a workshop replacing a single failed gear does not have to absorb unwanted stock.

Documentation & Verification

• Commercial invoice and packing list referencing part number 3946436 and destination details
• Compatibility sheet confirming fitment for your specific Cummins or Hyundai engine serial range
• Dimensional inspection record covering bore diameter, tooth count, and face width
• Warranty certificate stating the 3–12 month coverage scope for manufacturing defects
• Packing photographs showing VCI wrap, foam cushioning, and carton condition before seal
• HS code and export documentation support for customs clearance at destination

Stock, Shipping & Arrival

• Camshaft Gear 3946436 held in Guangzhou warehouse stock for same-day dispatch on confirmed orders
• Express courier delivery reaches major international hubs within days, tracking provided on handover
• Single-piece VCI and foam packaging designed to survive courier sortation without tooth damage
• Air and sea freight options quoted at order stage with estimated arrival windows stated upfront
• Dispatch confirmation with tracking number sent the same day the parcel leaves the warehouse

Send Us What You Have — We Will Confirm the Rest

If the old gear is still readable, photograph the stamped number and send it over. If the nameplate is gone or painted over, a shot of the machine data plate or the engine serial number is enough for us to verify whether 3946436 fits your HL757-7 or 4B3.9 application. Include your location and the machine downtime status so we can quote the fastest shipping option available. No need for a full purchase order just to start the identification conversation.

Frequently Asked Questions

Q: Is Camshaft Gear 3946436 currently in stock and ready to ship? A: Yes. This gear is held in our Guangzhou warehouse as a stocked item. Once your machine model or engine serial number is verified against our fitment records, the unit can be packed and handed to the courier the same business day. Stock status is confirmed at the time of inquiry.

Q: Can I order just one camshaft gear, or is there a batch minimum? A: One piece is the minimum. We understand that a single loader or excavator engine rarely needs more than one camshaft gear at a time. The order threshold does not block a single-unit emergency purchase, and the same warranty terms apply regardless of quantity.

Q: How quickly will the gear arrive if I choose express shipping? A: Express courier services typically deliver to major international destinations within a matter of days from dispatch. Exact transit time depends on your location and the carrier schedule. We provide an estimated arrival window when the shipping method is confirmed at order stage.

Q: The engine nameplate is worn off — can you still identify the correct gear? A: Yes. Send a clear photograph of whatever identification remains on the machine: the chassis data plate, the engine block casting number, or even the old gear itself if the stamping is partially visible. Our team cross-references these against Cummins and Hyundai serial ranges to confirm fitment before anything ships.

Q: What happens if the gear arrives and does not fit my engine? A: Contact us immediately with photos of the gear and your engine mating surface. We will verify the discrepancy against our fitment records and arrange a replacement or return. This is why we recommend confirming the engine serial number at inquiry stage, to prevent a mismatch before dispatch.