{"product_id":"otis-contact-brush-long-blade-os-2","title":"Otis contact brush, long blade SEES OS-2","description":"\u003ch3 data-path-to-node=\"0\"\u003eCore Specifications\u003c\/h3\u003e\n\u003cul data-path-to-node=\"1\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"1,0,0\"\u003e\u003cb data-path-to-node=\"1,0,0\" data-index-in-node=\"0\"\u003eManufacturer\/Vendor:\u003c\/b\u003e S.E.E.S. (Elevator Supplies \u0026amp; Equipment)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"1,1,0\"\u003e\u003cb data-path-to-node=\"1,1,0\" data-index-in-node=\"0\"\u003ePart Number:\u003c\/b\u003e OS-2\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"1,2,0\"\u003e\u003cb data-path-to-node=\"1,2,0\" data-index-in-node=\"0\"\u003eOEM Cross-Reference (Otis):\u003c\/b\u003e 6839D2 \/ 6839D4 (Contact Brush Assembly with 154AD4 Contact)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"1,3,0\"\u003e\u003cb data-path-to-node=\"1,3,0\" data-index-in-node=\"0\"\u003eBlade Geometry:\u003c\/b\u003e Extended \/ Long Blade (\u003cspan class=\"math-inline\" data-math=\"2.50\\text{ in.}\" data-index-in-node=\"39\"\u003e$2.50\\text{ in.}$\u003c\/span\u003e \/ \u003cspan class=\"math-inline\" data-math=\"63.5\\text{ mm}\" data-index-in-node=\"57\"\u003e$63.5\\text{ mm}$\u003c\/span\u003e)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"1,4,0\"\u003e\u003cb data-path-to-node=\"1,4,0\" data-index-in-node=\"0\"\u003eComponent Type:\u003c\/b\u003e Flexible copper\/brass leaf spring contact brush with silver-alloy wiper contact tip\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"1,5,0\"\u003e\u003cb data-path-to-node=\"1,5,0\" data-index-in-node=\"0\"\u003eApplication Alignment:\u003c\/b\u003e Otis 6851 series leveling switches, mechanical floor selectors, and advancer panels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"1,6,0\"\u003e\u003cb data-path-to-node=\"1,6,0\" data-index-in-node=\"0\"\u003eMounting Type:\u003c\/b\u003e Screws onto 306CH1 base insulator (OS-3A) using Hillside washers (OS-3B)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"3\"\u003eElevator Logic\u003c\/h3\u003e\n\u003cp data-path-to-node=\"4\"\u003eThe \u003cb data-path-to-node=\"4\" data-index-in-node=\"4\"\u003eSEES OS-2\u003c\/b\u003e is an aftermarket direct-replacement contact brush designed to replicate the fit, form, and electrical conductivity of the original Otis \u003cb data-path-to-node=\"4\" data-index-in-node=\"151\"\u003e6839D2 \/ 6839D4\u003c\/b\u003e long-blade selector contact. It operates on legacy mechanical floor controllers and leveling switches to establish transient electrical feedback as the elevator moves.\u003c\/p\u003e\n\u003cul data-path-to-node=\"5\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,0,0\"\u003e\u003cb data-path-to-node=\"5,0,0\" data-index-in-node=\"0\"\u003ePosition \u0026amp; Leveling Feedback:\u003c\/b\u003e Completes low-voltage electrical paths across stationary commutator bars or leveling switch cams to relay exact car position to the controller.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,1,0\"\u003e\u003cb data-path-to-node=\"5,1,0\" data-index-in-node=\"0\"\u003eDirectional Slowdown \u0026amp; Call Cancellation:\u003c\/b\u003e Triggers slowdown circuits and clears registered floor calls as the selector crosshead advances past landing contacts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,2,0\"\u003e\u003cb data-path-to-node=\"5,2,0\" data-index-in-node=\"0\"\u003eConstant Contact Pressure:\u003c\/b\u003e The long leaf-spring geometry delivers an optimized flexing force against stationary studs without over-stressing the wiper assembly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,3,0\"\u003e\u003cb data-path-to-node=\"5,3,0\" data-index-in-node=\"0\"\u003eSelf-Cleaning Wiping Action:\u003c\/b\u003e High-grade metal alloy contacts maintain low electrical resistance and rub off minor oxidation buildup during mechanical cycling.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"7\"\u003eAccessories\u003c\/h3\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003eSEES OS-1 (OEM 6839D1 \/ 6839D3):\u003c\/b\u003e Companion short-blade contact brush (\u003cspan class=\"math-inline\" data-math=\"2.00\\text{ in.}\" data-index-in-node=\"70\"\u003e$2.00\\text{ in.}$\u003c\/span\u003e blade) used on adjacent selector contact channels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eSEES OS-36 (OEM 154AD4):\u003c\/b\u003e Replacement silver-alloy contact tip specifically designed for the OS-2 brush assembly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eSEES OS-3A (OEM 306CH1):\u003c\/b\u003e Mounting base insulator for mounting OS-1 and OS-2 brushes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,0\"\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eSEES OS-3B (OEM 131BA1):\u003c\/b\u003e Hillside alignment washer for securing OS-1 and OS-2 brushes to the base insulator\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"10\"\u003eMaintenance \u0026amp; Code Details\u003c\/h3\u003e\n\u003ch4 data-path-to-node=\"11\"\u003eMaintenance Guidelines\u003c\/h4\u003e\n\u003cul data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,0,0\"\u003e\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003eTension \u0026amp; Air Gap Adjustment:\u003c\/b\u003e During routine selector inspection, verify that blade tension delivers sufficient wiping pressure without binding or permanently bending out of shape.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,1,0\"\u003e\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003eContact Tip Inspection:\u003c\/b\u003e Check the 154AD4 alloy tip (OS-36) for heavy pitting, grooving, or severe arcing damage. Replace worn tips or the complete brush assembly to ensure clean signal transmission.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,2,0\"\u003e\u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003eInsulator Base Integrity:\u003c\/b\u003e Inspect the 306CH1 mounting base (OS-3A) and Hillside washers (OS-3B) for cracks, oil contamination, or carbon tracking.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,3,0\"\u003e\u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"0\"\u003eTerminal Tightness:\u003c\/b\u003e Ensure all mounting screws are properly torqued to prevent loose electrical connections caused by machine room vibration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003ekeyword: O320B\u003c\/p\u003e","brand":"Parts4REM","offers":[{"title":"Default Title","offer_id":49547236835480,"sku":null,"price":0.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/4369\/5000\/files\/rn-image_picker_lib_temp_e9b558ae-27fa-485a-9777-fc8d0d13f6ed.jpg?v=1784924220","url":"https:\/\/parts4rem.ca\/products\/otis-contact-brush-long-blade-os-2","provider":"Parts4REM","version":"1.0","type":"link"}