6138-31-1110 crankshaft for Komatsu 6D110 engine

6138-31-1110 Replacement Crankshaft for Komatsu S6D110 / 6D110 Engine

Name: 6138-31-1110 Replacement Crankshaft for Komatsu S6D110 / 6D110 Engine
Brand: Topvelsun
SKU: 6138-31-1110
Availability: InStock

Part Number: 6138-31-1110 / 6138-31-1010

Ref Cross:6138-31-1110

MOQ: 1 Piece

Warranty: 6 Months

Lead Time: 7 - 15 Days

Product Type: Engine Crankshaft

Application: Komatsu 6D110 / S6D110 Engine

Compatible: WA300-2, WA500-3, D155A-2

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Product Description

6138-31-1110 / 6138-31-1010 Crankshaft Identification for Komatsu 6D110 Engine

This page has been refined around the 6138-31-1110 / 6138-31-1010 crankshaft and the Komatsu 6D110 engine reference. The previous product title included several machine references across different equipment types, including loader, dozer and excavator models. Because those applications may come from different parts books or supplier listings, they should be treated as references that require verification, not as confirmed universal fitment.

For a crankshaft, the engine family alone is not enough. The correct part must match the original crankshaft marking, journal dimensions, gear-end structure, flywheel-end structure and engine serial range. This is especially important when a part number is associated with multiple equipment categories.

Why Model Verification Matters for This Crankshaft

Different machine types: WA-series loaders, D-series dozers and PC-series excavators can use different engine arrangements even when similar engine families are referenced.

Serial range differences: the same machine model name may have different engine or crankshaft configurations by production year and serial number.

Parts-book confirmation: if the old parts book, engine plate or crankshaft marking does not confirm 6138-31-1110 / 6138-31-1010, do not confirm fitment by model name alone.

Dimension check: main journal, rod journal, gear end and flywheel end must be compared with the original crankshaft before shipment.

Information Needed Before Quotation

Old crankshaft marking: send a clear photo of any stamped or cast marking on the old crankshaft.

Engine plate: provide the engine model and engine serial number if available.

Machine plate: provide machine model and serial number, especially if the machine is a loader, dozer or excavator version.

Journal measurements: measure the main journal and rod journal to confirm whether the crankshaft is standard or has been reground.

End-structure photos: send both gear-end and flywheel-end photos to reduce mismatch risk.

Crankshaft Failure Conditions to Check

Journal scoring or blue heat marks: these usually indicate lubrication failure, bearing failure or severe overheating.

Metal particles in engine oil: inspect the oil filter, oil pan and oil pump before installing a replacement crankshaft.

Abnormal knocking noise: bearing clearance, connecting rod condition and crankshaft journal surface should be checked together.

Overhaul inspection: replace or inspect main bearings, connecting rod bearings and thrust bearings during crankshaft service.

Replacement Notes

Clean oil passages, bearing seats and the engine block before assembly.

Check bearing clearance and crankshaft end play according to the machine-specific service manual.

Inspect the oil pump and oil pickup tube if the old crankshaft failed because of low oil pressure.

Confirm oil pressure and abnormal noise during initial start-up before returning the machine to heavy-duty operation.

FAQ

Can this crankshaft be confirmed by machine model only?

No. This page previously included loader, dozer and excavator references. Final confirmation should be based on the original part number, engine model, engine serial number, journal size, gear end and flywheel end.

Why is the machine list treated as a reference instead of confirmed fitment?

The machine list includes different equipment categories. Without a matching parts book, engine plate or old crankshaft marking, model names alone are not enough to confirm crankshaft compatibility.

What should I send before ordering?

Please send the old crankshaft marking, engine plate, machine plate, main journal measurement, rod journal measurement, gear-end photo and flywheel-end photo.

Should bearings and oil pump be checked during replacement?

Yes. Bearing wear, oil contamination and poor oil pressure can damage a new crankshaft quickly. Main bearings, rod bearings, thrust bearings, oil pump and oil pickup should be checked during overhaul.