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Bulldozer Parts


TACK idlers for bulldozers are produced in compliance with OEM standards. TACK has selected high-quality steel, for example, because this alloy hardens well and is tough. Because bulldozers do a lot of mobile work, there is a lot of contact between the front idler wheel and the track link. 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.


    TACK manufactures and supplies a wide range of undercarriage carrier rollers for most makes and models of dozers, excavators and harvesters ranging in size from 0.8 to 100 tonnes. Our rollers offer an excellent replacement for OEM brands like Caterpillar, Komatsu, Kobelco and many others operating in industries from small civil works to mining.
    Our range offers an extensive range of single flange, double flange and heavy-duty rollers that are designed, engineered and produced in-house in our 100% owned facilities under rigid quality control measures to ensure product performance and reliability.
    *Our extensive range covers machines ranging from 0.8 to 100 tonnes, making TACK the go-to supplier for undercarriage solutions across a wide spectrum of industries.
    Specifically, our KOMATSU Bulldozer Carrier Roller D155A-1/2 is a standout product in our lineup. Crafted to the highest standards, this carrier roller is a perfect replacement for OEM brands like Caterpillar, Komatsu, Kobelco, and more. It is engineered to deliver exceptional performance and durability, ensuring smooth operation and longevity for your machinery.
    At TACK, we understand the importance of reliable undercarriage components in the day-to-day operations of heavy equipment. That's why our carrier rollers are meticulously manufactured to withstand the rigors of various applications, from small civil works to demanding mining environments. With TACK's carrier rollers, you can trust that your machinery will maintain optimal performance, even in the most challenging conditions.
    Our commitment to quality and precision means that TACK's undercarriage carrier rollers are trusted by industry professionals worldwide. Whether you are in construction, mining, or any other heavy-duty sector, our products are designed to meet and exceed your expectations.
    In addition to the KOMATSU Bulldozer Carrier Roller D155A-1/2, TACK offers a comprehensive range of undercarriage solutions, ensuring that you can find the perfect fit for your specific machinery requirements. With TACK, you can count on superior products, exceptional customer service, and a dedication to keeping your heavy equipment running at its best.


    KOMATSU: D135A-1, D135A-2, D150A-1, D155A-1, D155A-2, D155A-3, D155AX-3, D155A-5, D155A-6, D155AX-5, D155AX-6, D155AX-7, D155S-1, D155C-1, D155W-1

    Original Code

    175-30-00470, 175-30-00471, 175-30-00472, 175-30-00510, 175-30-00511, 175-30-00512, 175-30-00513, 175-30-00514, 175-30-00515, 175-30-00516, 175-30-00517, 175-30-00532, 17A-30-00720, 17A-30-00721, 17A-30-00730, 17A-30-00790, C40151G0M00, KM1438, KM2279


    Komatsu Bulldozer Carrier Roller D155A-1/2

    Model No. D155A-1/2
    OEM  NO. 175-30-00517
    Material 50Mn
    Technique Forging
    Weight 55KGS
    Surface Hardness


    Hardness Deepth 8-12mm

    Welding Operation

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