CAT 225 120G 950 Turbocharger 4N6859

4N6859 / 4N-6859 Turbocharger for Caterpillar 3304 Engine

The 4N6859 / 4N-6859 turbocharger is supplied for Caterpillar 3304 and 3304T diesel engine repair. It is used to restore engine boost pressure, air intake performance and stable combustion when the original turbocharger is worn, leaking oil, damaged or no longer providing normal boost response.

This page should focus on the 4N6859 turbocharger application for Caterpillar 3304 engine equipment. The old product page only kept a general VLS turbocharger list and mixed many unrelated turbo part numbers into the description. Those old elements should be removed to keep the 4N6859, 4N-6859, 0R-5799 and CAT 3304 product signals clear.

Part Number and Engine Application

The main part number for this page is 4N6859 / 4N-6859. The number 0R-5799 can be used as a matching reference for the related Cat reman turbocharger. Additional old numbers such as 4N6858, 4N9714 and 1W5210 may appear in repair records or buyer inquiries, but final matching should still be confirmed by turbocharger nameplate, engine model and removed sample photos before shipment.

Part Number: 4N6859 / 4N-6859

Ref Cross: 0R-5799 / 4N6858 / 4N9714 / 1W5210

Turbo Model: T04B91 / TO4B91 series turbocharger, verify by old nameplate

Engine Model: Caterpillar 3304 / 3304T

Machine Application: CAT 225 excavator, 120G / 130G motor grader, D4D / D4E tractor, 518 skidder, 920 / 930 / 950 wheel loader

Product Type: Engine Turbocharger

Application Notes for CAT 3304 Engine

This turbocharger should be checked for Caterpillar machines using 3304 or 3304T engine references. Common inquiry applications include CAT 225 excavator, 120G and 130G motor grader, D4D and D4E tractor, 518 skidder, and 920, 930 or 950 wheel loader. The correct turbocharger must still be confirmed by the old turbo nameplate and engine model.

Main Search Signal: 4N6859 / 4N-6859 turbocharger

Matching Number: 0R-5799

Engine Signal: Caterpillar 3304 / 3304T

Machine Signal: CAT 225 / 120G / 130G / D4D / D4E / 518 / 920 / 930 / 950 applications

Confirmation Method: Turbo nameplate, old part number, engine model and removed turbo photos

Key Checking Points Before Order

Turbochargers should not be confirmed only by machine model. The same machine model may use different engine versions or turbocharger specifications, so the old turbocharger plate number and engine model should be checked before quotation.

Part Number Check: Confirm 4N6859 or 4N-6859 from the old turbocharger plate, supplier record or removed sample.

Cross Number Check: If the buyer provides 0R-5799, 4N6858, 4N9714 or 1W5210, confirm it together with engine model and turbo photos.

Engine Check: Confirm whether the engine is Caterpillar 3304 or 3304T.

Machine Check: Confirm CAT 225, 120G, 130G, D4D, D4E, 518, 920, 930 or 950 application if the turbo is ordered by machine model.

Sample Check: Provide photos of the old turbocharger from the compressor side, turbine side, actuator side and nameplate side.

Turbocharger Replacement Notes

Before replacing the 4N6859 turbocharger, the engine air intake system, exhaust manifold, oil feed line, oil return line and air filter condition should be checked. Turbocharger failure can be caused by oil starvation, dirty oil, air restriction, exhaust leakage or foreign object damage.

After installation, the lubrication system should be primed before engine start. The oil line should be clean, the air intake pipe should be free from debris, and the engine should be checked for abnormal smoke, oil leakage, boost pressure loss or unusual noise during testing.

Recommended Information for Quotation

Part Number: 4N6859 / 4N-6859

Matching Number: 0R-5799 / 4N6858 / 4N9714 / 1W5210 if available

Engine Model: Caterpillar 3304 / 3304T

Machine Model: CAT 225, 120G, 130G, D4D, D4E, 518, 920, 930, 950

Old Sample: Turbocharger photos from multiple angles

Nameplate: Clear photo of the turbocharger tag or stamped number

Order Details: Required quantity and destination country

FAQ

Is 4N6859 the same as 4N-6859?

Yes. 4N6859 and 4N-6859 are the same main part number format for this turbocharger page.

Can 0R-5799 be used as a matching number?

Yes. 0R-5799 can be used as a matching reference for this turbocharger page. Final confirmation should still be based on old turbo photos, nameplate and engine model.

Is this turbocharger for Caterpillar 3304 engine?

Yes. This page is focused on 4N6859 / 4N-6859 turbocharger replacement for Caterpillar 3304 and 3304T engine applications.

What should I provide before ordering?

Please provide the old turbocharger part number, turbo nameplate photo, engine model, machine model and clear photos of the removed turbocharger.

Do I need to check oil lines before replacing the turbo?

Yes. Oil feed and oil return lines should be checked and cleaned before installation. Poor lubrication can damage a replacement turbocharger quickly.