600-635-7870 Excavator Fan Blade for Komatsu PC300-7 PC400-7

600-635-7870 Cooling Fan Blade for Komatsu PC300-7 PC400-7

The 600-635-7870 / 6006357870 cooling fan blade is used for Komatsu excavator engine cooling system applications. It helps maintain airflow through the radiator and cooling area, supporting stable engine temperature during heavy-duty operation.

This page focuses on 600-635-7870 as the main part number. It is mainly referenced for Komatsu PC300-7 and PC400-7 excavator applications. Final fitment should be verified by the old fan blade number, physical dimensions, rotation direction, mounting hole layout and machine serial number.

600-635-7870 Part Number Focus

The main part number for this product page is 600-635-7870. The non-hyphen search format 6006357870 may also appear in supplier listings, parts searches and maintenance records.

To keep product selection accurate, this page should not be mixed with other Komatsu fan blade numbers. Similar fan blades may differ in diameter, blade count, hub size, offset, blade angle, rotation direction or bolt hole pattern.

Reference Information for 600-635-7870

Why Physical Matching Is Important

The 600-635-7870 fan blade should be selected by part number and physical configuration. A fan blade with the wrong diameter, offset or rotation direction may reduce airflow, cause vibration, or interfere with the shroud and radiator area.

Before replacement, compare the old fan blade with the new part by blade angle, mounting hole pattern, center bore, overall diameter and installation clearance. Model name alone is not enough for final confirmation.

Common Failure Symptoms

• Engine overheating: weak airflow, damaged fan blades or radiator blockage may cause high coolant temperature.

• Cracked fan blade: aging, vibration or impact may cause cracks near the blade root or mounting area.

• Abnormal vibration: fan blade damage, imbalance or incorrect mounting may cause vibration during operation.

• Contact marks: check the fan shroud, radiator clearance, pulley alignment and engine mount condition.

• Unusual fan noise: loose bolts, damaged blade edges or incorrect installation clearance should be inspected.

Troubleshooting Before Replacement

• Confirm whether the old fan blade number matches 600-635-7870 or the search format 6006357870.

• Check fan diameter, blade count, center bore, bolt hole count and mounting hole spacing.

• Confirm the rotation direction and blade angle before ordering.

• Inspect the radiator, fan shroud, pulley, belt, fan hub and mounting bolts for related faults.

• Check whether overheating is caused by the fan blade, radiator blockage, belt slip, water pump, thermostat or coolant system issue.

Installation and Maintenance Notes

• Stop the machine and allow the engine area to cool before replacing the fan blade.

• Clean the fan hub and mounting surface before installation.

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

• Tighten mounting bolts evenly according to the service procedure.

• Check clearance between the fan blade, radiator, shroud and nearby hoses.

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

FAQ

Q: What is 600-635-7870?

600-635-7870 is a cooling fan blade, also searched as an engine fan blade or radiator fan blade, for Komatsu excavator engine cooling system applications.

Q: Is 6006357870 the same search number as 600-635-7870?

Yes. 6006357870 is the non-hyphen search format of 600-635-7870. Both formats may appear in parts searches and supplier listings.

Q: Which Komatsu models are mainly referenced?

This fan blade is mainly referenced for Komatsu PC300-7 and PC400-7. Other model references should be verified by the old fan blade number, physical dimensions and machine serial number.

Q: Can 600-635-7850 replace 600-635-7870?

Not automatically. 600-635-7850 and 600-635-7870 are different Komatsu fan blade references and should not be treated as interchangeable unless confirmed by the old fan blade and parts reference.

Q: What should be checked before ordering?

Check the old fan blade number, diameter, blade count, center bore, mounting hole layout, offset, rotation direction and machine serial number. Clear photos and measurements are recommended.