4N0733 Engine Oil Pump for Caterpillar 3126, 3406, 3406B, 3406C, 3406E Engines

High-Volume Lubrication Engineered for Severe-Duty Industrial Operations

High-displacement heavy machinery engines like the Caterpillar 3406 and 3406B series are subject to immense mechanical loads and prolonged operating hours. Optimal oil circulation is vital to dissipate friction heat and prevent metal-on-metal wear on crankshaft journals and cam lobes.

Our Premium Aftermarket 4N0733 Oil Pump is engineered using premium high-density cast iron housing and precision-ground gears. It guarantees stable volumetric flow rates even under maximum operating temperatures, eliminating dangerous low-pressure warnings and minimizing costly downtime for your heavy commercial fleet.

Key Benefits & Technical Advantages

• Optimized Flow Rates: Matches original factory displacement curves to ensure continuous lubrication to the turbocharger and piston cooling nozzles.

• Anti-Wear Performance: Hardened gear teeth reduce backlash and maintain precise tolerances throughout the pump’s service life.

• Leak-Proof Casting: High-integrity housing prevents internal fluid bypass, maintaining high efficiency at both idle and peak RPM.

Q1: What causes a Caterpillar 3406/3406B engine to suffer from low oil pressure, and will replacing the oil pump fix it?

A: Low oil pressure in CAT 3406 series engines can stem from multiple factors, including worn oil pump gears, a sticking pressure relief valve, excessive main bearing clearances, or an oil cooler restriction. Replacing your worn unit with our heavy-duty 4N0733 oil pump ensures the source of oil delivery meets or exceeds factory pressure specifications, establishing a solid baseline for engine system troubleshooting.

Q2: Is the 4N0733 oil pump a direct drop-in replacement for a CAT 3406E engine?

A: Yes. The 4N0733 part number is engineered to standard OEM dimensions and bolt configurations across the specified CAT 3406, 3406B, 3406C, 3406E, and 3126 engine families. However, given the vast layout variations across trucks, marine units, and industrial gensets, we recommend verifying your specific engine serial number (ESN) with our team before dispatch to guarantee perfect oil pan clearance.

Q3: How do you protect this heavy item during international transit, and what is the typical delivery timeframe?

A: Because heavy oil pumps are sensitive to impact damage on their mounting flanges and internal gear shafts, we wrap every unit in industrial anti-corrosion VCI packaging and encase it within a heavy-duty, impact-resistant box with custom structural foam padding. We ship globally via premier expresses including DHL, FedEx, and UPS, with delivery typical within 3-7 business days directly to your workshop or job site.

Q4: Does this 4N0733 oil pump package come with the required mounting gaskets and seals?

A: Yes, this assembly is supplied with the primary installation mounting gaskets and O-rings needed to secure a leak-free seal onto the engine block. If your complete engine overhaul requires a full overhaul gasket kit or replacement main bearings, please browse our engine parts category or request a consolidated package quote via the enquiry form.