{"product_id":"bartell-21781-main-gear-oem-replacement-part","title":"Bartell 21781 Main Gear - OEM Replacement Part","description":"\u003cp\u003eTransmitting rotational force from the drive system to the trowel blades, the main gear is a critical power transfer component in walk behind trowel machines, when it wears or fails, blade rotation becomes inconsistent or stops entirely, making replacement essential to restore proper finishing performance.\u003c\/p\u003e\u003cp\u003eAs part of the core drivetrain assembly, the main gear endures continuous mechanical stress during concrete finishing operations. Signs of wear typically include unusual grinding noise from the gearbox, loss of blade speed or torque, and visible chipping or degradation of the gear teeth. Replacing the main gear at the first sign of these symptoms prevents further damage to surrounding drivetrain components and avoids costly downtime on the job site.\u003c\/p\u003e\u003cp\u003eThis OEM part is manufactured to Bartell Global's original specifications, ensuring correct tooth profile, material hardness, and dimensional fit for a reliable, long-lasting repair. Aftermarket substitutes may not meet these tolerances and can lead to premature failure or damage to mating components.\u003c\/p\u003e\u003cp\u003eCompatible models:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBartell BC436\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eGenuine Bartell Global OEM part, sold by an authorized dealer.\u003c\/p\u003e","brand":"Bartell","offers":[{"title":"Default Title","offer_id":43412763148336,"sku":"21781","price":389.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6574\/7248\/files\/21781.jpg?v=1784314260","url":"https:\/\/cce-industries.com\/products\/bartell-21781-main-gear-oem-replacement-part","provider":"CCE Industries","version":"1.0","type":"link"}