600-635-7850 Fan Blade for Komatsu PC300-6 PC400-6

600-635-7850 Fan Blade for Komatsu PC300-6 PC400-6

The 600-635-7850 / 6006357850 fan blade is used in Komatsu excavator engine cooling system applications. It is commonly referenced as a cooling fan blade or engine fan blade for Komatsu PC300 and PC400 series excavators.

This fan blade should be selected by the original part number and physical configuration, not by model name alone. Komatsu machines may vary by engine arrangement, fan hub, blade diameter, mounting hole pattern and rotation direction. Final fitment should be verified before ordering.

Cross Reference Numbers

Common reference numbers may include 600-635-7850 and 6006357850. These two formats are commonly used in supplier listings, parts searches and maintenance records.

Other Komatsu fan blade numbers such as 600-635-7870, 600-633-7850, 600-625-0520 or 600-625-7620 should not be treated as cross references for this product unless the old fan blade and parts reference confirm the same specification.

Application and Fitment Reference

This Komatsu 600-635-7850 cooling fan blade is mainly referenced for PC300-6 and PC400-6. Public supplier references may also list related models such as PC350-6, PC450-6, PC400-7 and PC340NLC-6K.

Engine references may include 6D108, 6D125, SAA6D108E, SA6D125E and SAA6D125E. These should be used as fitment references only. Before purchase, compare the old fan blade part number, diameter, blade count, hole count, hub size, offset and rotation direction.

Common Failure Symptoms

• Engine overheating: reduced airflow through the radiator may cause high coolant temperature.

• Cracked or broken blade: damaged blades can reduce cooling performance and create imbalance.

• Abnormal vibration: worn mounting points, cracked fan blade or incorrect blade balance may cause vibration.

• Radiator contact marks: incorrect installation, loose mounting or wrong fan specification may cause interference.

• Unusual fan noise: damaged blade edges, loose bolts or shroud interference should be checked.

Troubleshooting Before Replacement

• Check coolant level, radiator cleanliness and fan belt condition before replacing the fan blade.

• Inspect the old fan blade for cracks, deformation, missing sections or worn mounting holes.

• Check the fan hub, pulley, shroud and mounting bolts for damage or looseness.

• Confirm whether overheating is caused by the fan blade, radiator blockage, thermostat, water pump or belt tension.

• Compare the old blade size, hole count and rotation direction before ordering a replacement.

Installation and Maintenance Notes

• Stop the engine and allow the cooling system to cool before removal.

• Inspect the fan hub and mounting surface before installing the replacement blade.

• Do not install a fan blade with a different hole pattern, offset or rotation direction.

• Tighten mounting bolts evenly according to the machine service procedure.

• Check clearance between the fan blade, shroud and radiator before starting the engine.

• After installation, run the engine at low speed first and check for vibration, abnormal noise and airflow direction.

Fitment Check Before Ordering

To reduce wrong orders, please send the machine model, machine serial number, old fan blade part number, full fan blade photo, hub photo, mounting hole photo, blade diameter and rotation direction before quotation.

FAQ

What is the relationship between 600-635-7850 and 6006357850?

6006357850 is the non-hyphen writing format of 600-635-7850. Both formats may appear in parts searches, supplier listings and maintenance records.

Which Komatsu models are commonly listed for this fan blade?

Common model references include Komatsu PC300-6 and PC400-6. Some public supplier references also list PC350-6, PC450-6, PC400-7 and PC340NLC-6K. Final fitment should be verified by the old fan blade and machine serial number.

Which engine references are associated with 600-635-7850?

Public references may associate this fan blade with Komatsu engine references such as 6D108, 6D125, SAA6D108E, SA6D125E and SAA6D125E. The old fan blade specification should still be compared before ordering.

Can 600-635-7870 or 600-633-7850 replace 600-635-7850?

Not automatically. These are different Komatsu fan blade references and may have different dimensions, hole patterns or applications. They should not be treated as direct replacements unless confirmed by the old fan blade and parts reference.

What should be checked before ordering?

Please check the old fan blade part number, blade diameter, blade count, mounting hole count, hub size, offset, rotation direction and machine serial number. Clear photos of the old fan blade are recommended.