{"product_id":"bartell-21815-gearbox-assembly-oem-replacement-walk-behind-trowel-part","title":"Bartell 21815 Gearbox Assembly OEM Replacement - Walk Behind Trowel Part","description":"\u003cp\u003eThis gearbox assembly transfers engine power to the trowel blades, making it the mechanical heart of the walk behind trowel's drive system, when it fails, the machine loses blade rotation entirely and requires immediate replacement to return to service.\u003c\/p\u003e\u003cp\u003ePart 21815 is the complete gearbox assembly for the BC436 walk behind power trowel. As a full assembly replacement, this unit is the correct solution when internal gear wear, bearing failure, or housing damage has progressed beyond individual component repair. Gearbox assemblies on walk behind trowels are subject to significant radial and axial loading during operation, and units working in abrasive concrete slurry environments are particularly prone to accelerated wear. When replacing, ensure the mating surfaces are clean and free of debris before installation, and verify that all fasteners are torqued to Bartell Global specifications for the BC436 drivetrain. Inspect the input and output shafts for wear or scoring during the swap. A failing gearbox will typically present as unusual noise during blade rotation, excessive vibration, blade speed inconsistency, or visible oil leakage from the housing.\u003c\/p\u003e\u003cp\u003eCompatible models:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBC436\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":43412763967536,"sku":"21815","price":1765.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6574\/7248\/files\/21815.jpg?v=1784314330","url":"https:\/\/cce-industries.com\/products\/bartell-21815-gearbox-assembly-oem-replacement-walk-behind-trowel-part","provider":"CCE Industries","version":"1.0","type":"link"}