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Caterpillar Bulldozer Idler D8N (620)

Bulldozer Parts

Caterpillar Bulldozer Idler D8N (620)

TACK is an engineering machinery factory with over 20 years of experience. Our main products are undercarriage parts for bulldozers, excavators, and agricultural harvesters etc. Our products, including track rollers , carrier rollers , idlers, sprockets, and track chains, have been highly praised overseas. We support machinery brands such as CATERPILLER, LIEBHERR, KOMATSU, JOHN DEERE, CASE, KOBELCO, SUMITOMO, VOLVO, HITACHI, HYUNDAI, etc. We are a direct manufacturing factory with quality assurance, fast delivery, a wide range of product types, and the convenience of one-stop shopping. We have dedicated designers who can provide precise and personalized services, quickly develop samples according to customer request , and our factory processes are organized and flexible to adjust production as customers required.

Acceptance: OEM/ODM, Trade, Wholesale, Regional Agency. 

Payment: T/T, L/C, X-transfer


    Track links wear on the excavator track idlers running surface.  Links and idlers wear as it were in line with each other.  A specified wear value defines when the idler is 100% worn out.  If the hardened section of the running surface is worn, then you should replace the idler.If the sides of the grousers show signs of wear, or the idler rubs against the side of the frame, then the track link is not in line with the idler.  This may be caused by an open frame, worn side shoes, a broken axle or a defective tension device.
    TACK idlers are available for the range of 0.8 to 100 ton. We produce the idlers using selected quality steel alloys and we apply induction hardening for optimal performance in extreme weather conditions. We assemble them using high quality seals .  Experience has taught us that it is very important to subject the idlers’ running surface to a specific process; for this, we apply a special molding method to prevent the formation of gas in the material. Moreover, a specific heat treatment on the surface ensures better depth hardening and therefore a longer service life. We use a higher molding temperature and take extra time to allow the molded material to cool down in a controlled way. This prevents fissures from forming during the process.



    Original Code



    Caterpillar Bulldozer Idler D8N (620)

    Model No.
    D8N (620mm)
    OEM  NO. 6Y0554
    Material 50Mn
    Technique Forging
    Weight 317KGS
    Surface Hardness


    Hardness Deepth 8-12mm

    Welding Operation

    by ARC CO² welding
    Machining Operation CNC machine
    Colors Yellow or Black