4W-2448 Oil Pump Assembly for Caterpillar CAT 330B Excavator D6R Dozer

4W-2448 Engine Oil Pump for CAT 330B and D6R

The 4W-2448 engine oil pump is supplied for Caterpillar 3304 and 3306 diesel engine lubrication system repair. It is commonly searched as 4W-2448, 4W2448, engine oil pump, oil pump assembly or lubrication oil pump for CAT 330B excavator, D6R dozer and other Caterpillar equipment using 3304 or 3306 engine references.

This page focuses on 4W-2448 as the main part number. 4W2448 is the no-hyphen search format, while 8N-8635, 6I-1346 and 0R-0920 may appear as cross reference or replacement checking numbers in public parts references. Final fitment should be confirmed by the old oil pump number, engine model, pump body shape, gear design, mounting face and machine information before ordering.

Engine Application: Caterpillar 3304 and 3306

For engine-part SEO clarity, this product should be strongly connected with Caterpillar 3304 and 3306 engines. Buyers may search by engine model when the machine model is unclear, when the engine has been rebuilt, or when the old oil pump has already been removed from the equipment.

The 3304 / 3306 engine direction is more stable than a long list of machine models. For this reason, the H1 should focus on 4W-2448 and Caterpillar 3304 / 3306 engine, while the SEO Title can cover CAT 330B and D6R model search intent.

If the customer only provides an engine model, ask for the engine nameplate and old oil pump photos. If the customer only provides a machine model, confirm whether the machine is still using the original Caterpillar 3304 or 3306 engine before quotation.

Machine Model Reference for CAT 330B and D6R

The main application references for this oil pump page are CAT 330B excavator and D6R dozer. Market references may also connect 4W-2448 with other Caterpillar machines using 3304 or 3306 engines, such as D6C, D6D, D7G, 930, 950B, 966C and 966D model references.

These machine names should be treated as application references, not as the only fitment proof. Older Caterpillar equipment may have engine replacement, previous overhaul history or non-original oil pump changes.

For accurate ordering, compare the removed oil pump before shipment. Photos of the old pump number, gear side, mounting face, oil passage, pump body and engine nameplate are useful for confirmation.

Part Number and Cross Reference Notes

4W-2448 is the main part number of this page. The compact format 4W2448 can be included for search coverage, but it should not replace the original hyphenated part number as the main page signal.

8N-8635 and 6I-1346 are commonly used in aftermarket oil pump references for Caterpillar 3304 and 3306 engine applications. 0R-0920 appears as a Cat Reman engine oil pump direction in official Cat parts references. These numbers are useful for checking, but the old pump and engine information should still be verified before ordering.

Some references may also mention 116-7589 or 4P-4020 as related Caterpillar oil pump numbers. They can be useful for parts checking, but the top of this page should not list too many numbers, because the main SEO signal should remain 4W-2448 for Caterpillar 3304 / 3306 engine oil pump.

How to Confirm the Correct 4W-2448 Engine Oil Pump

Engine oil pumps can look similar from the outside, but small differences in gear design, mounting face or oil passage layout may cause installation problems. Before ordering, check the removed oil pump carefully.

• Confirm whether the old oil pump number is 4W-2448, 4W2448 or a listed checking reference.

• Check whether the engine model is Caterpillar 3304 or 3306.

• Compare the pump body shape, gear side and mounting face.

• Check oil inlet, oil outlet and oil passage positions.

• Confirm gasket surface, bolt hole pattern and drive gear arrangement.

• Send machine model, engine nameplate and old oil pump photos before quotation if you are not sure.

Common Oil Pump Failure Symptoms

An engine oil pump may need replacement when the engine shows low oil pressure, oil pressure warning, abnormal bearing noise, poor lubrication, engine overheating, metal particles in engine oil or serious wear after long-term operation.

These symptoms are not always caused by the oil pump itself. Blocked oil passages, dirty engine oil, worn bearings, damaged oil pickup tube, clogged oil strainer, pressure relief valve problems or incorrect engine oil viscosity can create similar symptoms.

Before replacing the oil pump, inspect the lubrication system and confirm the root cause of low oil pressure. Installing a new pump without cleaning the oil circuit may lead to repeated engine damage.

Troubleshooting Before Replacement

Before ordering a 4W-2448 replacement oil pump, check the related engine lubrication parts. This helps repair shops and equipment owners avoid unnecessary replacement or repeated failure after installation.

• Check engine oil level, oil grade and oil contamination.

• Inspect oil filter, oil strainer and oil pickup tube condition.

• Check whether the pressure relief valve is stuck, worn or contaminated.

• Inspect crankshaft bearings, camshaft bearings and related lubrication surfaces.

• Confirm whether metal debris or sludge is present in the oil pan.

• Clean the oil circuit if the old pump failed due to contamination or engine wear.

Installation and Maintenance Notes

Before installation, clean the mounting surface and oil passages. Compare the replacement oil pump with the removed unit, including gear position, pump body shape, bolt holes and gasket surface.

Use a proper gasket or sealing method according to the engine repair requirement. After installation, check oil pressure during startup and confirm that oil circulates normally before putting the engine under load.

For longer service life, use clean engine oil, replace filters on time and avoid running the engine with low oil pressure. If the previous failure was caused by sludge, bearing wear or contamination, those causes should be corrected during repair.

Buying Notes for Repair Shops and Parts Distributors

For repair shops, this 4W-2448 engine oil pump is suitable for Caterpillar 3304 and 3306 engine lubrication repair when the old pump is worn, damaged or unable to maintain stable oil pressure. For distributors, it can be supplied as a replacement oil pump reference for CAT 330B, D6R and related Caterpillar engine service demand.

Topvelsun supports small repair orders and bulk inquiries. To improve quotation accuracy, please send the required quantity, old pump number, engine model, machine model and photos of the old oil pump from multiple angles.

FAQ

What is the main product on this page?

This page is for the 4W-2448 engine oil pump used for Caterpillar 3304 and 3306 diesel engine lubrication system repair.

Is 4W2448 the same search reference as 4W-2448?

4W2448 is the no-hyphen writing format of 4W-2448. The main part number of this page should remain 4W-2448, and the removed oil pump should still be checked before ordering.

What cross references can be checked?

Common checking references include 8N-8635, 6I-1346 and 0R-0920. These numbers should be used for verification, and final fitment should be confirmed by old oil pump number, engine model and physical pump configuration.

Which engine models are the main references?

The main engine references are Caterpillar 3304 and 3306. Final confirmation should be based on the old oil pump, engine nameplate and pump physical configuration.

Which machine models can be used as references?

Common machine references include CAT 330B excavator and D6R dozer. Other Caterpillar machines using 3304 or 3306 engines may also appear in market references, but the old pump and engine information should be checked before shipment.

What should I check before ordering?

Please check the old oil pump number, engine model, pump body shape, gear design, mounting face, bolt hole pattern and oil passage position. Clear photos of the removed pump are recommended.

What can cause repeated oil pump or low oil pressure problems?

Repeated problems may be caused by dirty engine oil, clogged oil strainer, blocked oil passages, worn bearings, pressure relief valve faults, sludge in the oil pan or installing a new pump without cleaning the lubrication system.