6207-31-1100 crankshaft for S6D125 engine

For Komatsu S6D125 Diesel Engine Crankshaft 6207-31-1100 6207-31-1110

Name: For Komatsu S6D125 Diesel Engine Crankshaft 6207-31-1100 6207-31-1110
Brand: Topvelsun
SKU: 6207-31-1100
Availability: InStock

Part Number: 6207-31-1100 / 6207311100

MOQ: 1 Piece

Warranty: 6 Months

Lead Time: 7 - 15 Days

Engine Reference: Komatsu S6D95L-1 / SA6D95L-1 / SAA6D95LE-1

Model References: PC200-5, PC200LC-5, PC220LC-5, PC200-6L, PC210LC-6L, PC220LC-6L, PC250LC-6L, GD511A-1

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Product Description

6207-31-1100 / 6207311100 Crankshaft Fitment and Inspection Notes

This crankshaft page has been corrected from an earlier PC200-8 reference. Current supplier reference data points more strongly toward older Komatsu S6D95L-series applications, so PC200-8 should not be used as the main fitment unless it is confirmed by the original parts book, engine plate, old crankshaft marking or machine serial number.

For crankshaft replacement, the machine model alone is not enough. The most reliable confirmation method is to compare the original part number, engine model, main journal size, rod journal size, gear-end structure and flywheel-end structure before ordering.

Fitment Verification Before Ordering

Original part number: Check the old crankshaft marking, parts book reference or supplier label before confirming the order.

Engine plate: Confirm the actual engine model on the machine instead of relying only on the excavator model.

Journal measurement: Measure the main journal and rod journal diameter, and check whether the crankshaft is standard size or has been reground.

Gear-end structure: Compare the timing gear side, keyway, oil passage and mounting structure with the old crankshaft.

Flywheel-end structure: Check the bolt pattern, flange shape and flywheel-side dimensions before shipment.

When Should the Crankshaft Be Replaced?

Journal scoring: Deep scratches, heat marks or uneven wear on the main journal or rod journal may indicate that the crankshaft is no longer suitable for reuse.

Bearing failure: Damaged main bearings or connecting rod bearings can quickly damage the crankshaft surface and affect engine stability.

Low oil pressure: Poor lubrication can damage the crankshaft, bearings, oil pump and other rotating engine parts.

Abnormal engine noise: Heavy knocking, metallic noise or vibration should be checked before the machine returns to work.

Engine overhaul: During an engine rebuild, the crankshaft should be measured and inspected together with the bearing set and lubrication system.

Replacement and Inspection Notes

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

Use the machine-specific service manual for torque values, bearing clearance and assembly sequence.

Check main bearings, connecting rod bearings and thrust bearings before final assembly.

Inspect the oil pump, oil pickup tube and oil filter if the previous failure was related to low oil pressure or oil contamination.

After installation, confirm oil pressure, engine noise and initial running condition before returning the machine to heavy-duty operation.

Ordering Information

For faster confirmation, please send the engine plate photo, machine model, machine serial number, old crankshaft photos, visible part marking, main journal measurement, rod journal measurement, gear-end photo and flywheel-end photo. These details help confirm whether the crankshaft matches the actual engine configuration.

FAQ

Is this crankshaft suitable for PC200-8?

PC200-8 should not be used as the main fitment unless the original parts book, engine plate, old crankshaft marking or machine serial number confirms it. The previous PC200-8 reference is not recommended as the primary application for this page.

How do I confirm whether this crankshaft fits my engine?

Confirm the original part number, engine model, main journal size, rod journal size, gear-end structure, flywheel-end structure and machine serial number. Photos of the old crankshaft and engine plate are recommended before ordering.

Should bearings be checked when replacing this crankshaft?

Yes. Main bearings, connecting rod bearings and thrust bearings should be checked during crankshaft replacement. Bearing wear, oil contamination or low oil pressure can damage a new crankshaft quickly.

What photos should I send for confirmation?

Please send photos of the old crankshaft, visible part marking, main journals, rod journals, gear end, flywheel end, engine plate and machine model plate.