2107-6004B A/C Idler Pulley 4PK Belt Tensioner for Doosan Solar 250LC-V Solar 290LC-V Solar 300LC-7A

2107-6004B 4PK A/C Idler Pulley

2107-6004B is a 4PK idler pulley assembly used in the air-conditioning belt drive on selected Doosan and Daewoo excavators. In the Doosan parts catalog, this component is identified as a 4PK idle pulley within the air-conditioner system rather than as a hydraulic or rubber component.

The pulley supports and guides the A/C compressor belt while allowing belt position and tension to be adjusted through the mounting arrangement. Confirm the OEM part number, 4PK groove configuration and original installation before replacement.

Pulley and Belt Inspection

Check the pulley grooves for uneven wear, corrosion or damage and rotate the bearing by hand to check for roughness, looseness or abnormal noise. A worn idler bearing can cause belt vibration, misalignment and premature A/C belt wear.

Inspect the 4PK belt at the same time for cracking, glazing and edge damage. Belt alignment should be checked after installation so the belt runs correctly across the compressor and idler pulley.

Doosan / Daewoo A/C System Fitment

2107-6004B is confirmed in the Solar 300LC-V air-conditioning parts catalog as a 4PK idler pulley assembly. Because similar Doosan and Daewoo excavators can use different pulley and belt arrangements, fitment should be checked using the original part number and machine configuration.

For parts confirmation, provide the excavator model, machine serial number and clear photos of the original pulley. Groove count, pulley diameter and mounting hardware can also help distinguish similar A/C belt components.

Topvelsun Supply Support

Topvelsun supplies excavator belt tensioners, idler pulleys and related A/C drive components with 1-piece MOQ and a 6-month warranty. Send the OEM number and original part information for fitment confirmation before ordering.