{"product_id":"bar-adjustment-gear","title":"Husqvarna Bar Adjustment Worm Screw 537397001 | Chain Tensioner Gear | New","description":"\u003ch2\u003eHusqvarna Bar Adjustment Worm Screw | Part #537397001 | Chain Tensioner Gear | New\u003c\/h2\u003e\u003cp\u003eThis is the genuine Husqvarna worm screw, the threaded gear that drives the bar adjustment pin when you turn the chain tensioner. It is a small part that strips or seizes and then leaves you unable to tension the chain at all. Husqvarna lists it across a wide run of gas and battery chainsaws, so it is a good one to keep on the shelf.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 537397001\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Husqvarna\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHusqvarna Description:\u003c\/strong\u003e Worm Screw (bar adjustment gear)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Drives the bar adjustment pin in the chain tensioning mechanism\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlso Known As:\u003c\/strong\u003e Cataloged under Jonsered, RedMax, Poulan, and Electrolux\/AYP using the same number, 537397001\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRestores chain tensioning\u003c\/strong\u003e When the tensioner spins freely or refuses to turn, this gear is usually the culprit. Swapping it brings the adjuster back to life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Husqvarna tolerances\u003c\/strong\u003e The thread pitch and gear engagement have to match the adjuster pin exactly or the new part strips within a tank of fuel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide model coverage\u003c\/strong\u003e Husqvarna lists this same worm screw across gas saws from the 135 up through the 450 Rancher family and across the battery 500 series and T540 top handle saws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheap insurance\u003c\/strong\u003e Small enough to keep two in the truck box, important enough that the saw is unusable without it.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eHusqvarna's parts data lists part 537397001 as used in the following machines:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHusqvarna 135\u003c\/li\u003e\n\u003cli\u003eHusqvarna 435\u003c\/li\u003e\n\u003cli\u003eHusqvarna 435i\u003c\/li\u003e\n\u003cli\u003eHusqvarna 440 II e-series\u003c\/li\u003e\n\u003cli\u003eHusqvarna 445\u003c\/li\u003e\n\u003cli\u003eHusqvarna 445S\u003c\/li\u003e\n\u003cli\u003eHusqvarna 450\u003c\/li\u003e\n\u003cli\u003eHusqvarna 450S Rancher\u003c\/li\u003e\n\u003cli\u003eHusqvarna 450X Rancher\u003c\/li\u003e\n\u003cli\u003eHusqvarna 535i XP\u003c\/li\u003e\n\u003cli\u003eHusqvarna 536Li XP\u003c\/li\u003e\n\u003cli\u003eHusqvarna 540 XP Mark III\u003c\/li\u003e\n\u003cli\u003eHusqvarna 540i XP\u003c\/li\u003e\n\u003cli\u003eHusqvarna 542i XP and 542i XP G\u003c\/li\u003e\n\u003cli\u003eHusqvarna T535i XP\u003c\/li\u003e\n\u003cli\u003eHusqvarna T536Li XP\u003c\/li\u003e\n\u003cli\u003eHusqvarna T540 XP\u003c\/li\u003e\n\u003cli\u003eHusqvarna T540 XP II\u003c\/li\u003e\n\u003cli\u003eHusqvarna T540 XP Mark III\u003c\/li\u003e\n\u003cli\u003eHusqvarna T540i XP\u003c\/li\u003e\n\u003cli\u003eHusqvarna T542i XP and T542i XP G\u003c\/li\u003e\n\u003cli\u003eHusqvarna 225i Power Axe\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBattery model listings above cover the tool only, battery and charger included, and G variants of the same saw. Please confirm your model and serial number against your parts diagram before ordering, since Husqvarna revises tensioner hardware between production runs.\u003c\/p\u003e\u003ch3\u003eWhy Buy OEM?\u003c\/h3\u003e\u003cp\u003eA tensioner worm screw is a wear part machined to work against a specific adjuster pin. Factory tolerances keep the gear teeth fully engaged so the load spreads across the thread instead of concentrating on one flank. An aftermarket screw that is a few thousandths off will round over and leave you unable to tension the chain in the middle of a job.\u003c\/p\u003e\u003ch3\u003eWhy Buy From SWI Outlet Store?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e✔ Genuine Husqvarna OEM worm screw for the bar adjustment mechanism\u003c\/li\u003e\n\u003cli\u003e✔ Confirmed fitment across the Husqvarna chainsaw models listed above\u003c\/li\u003e\n\u003cli\u003e✔ Same part number used across Jonsered, RedMax, Poulan, and Electrolux\/AYP catalogs\u003c\/li\u003e\n\u003cli\u003e✔ Brand new, never installed\u003c\/li\u003e\n\u003cli\u003e✔ Small part, big consequence: worth keeping a spare\u003c\/li\u003e\n\u003cli\u003e✔ Fast Shipping - Ships Quickly from the USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eKeywords:\u003c\/strong\u003e 537397001, Husqvarna worm screw, Husqvarna bar adjustment gear, chain tensioner screw, Husqvarna 450 tensioner, Husqvarna 435 chain adjuster, T540 XP parts, Husqvarna 135 tensioner, chainsaw bar adjuster, Husqvarna OEM chainsaw parts\u003c\/p\u003e\u003cp\u003e\u003cem\u003ePlease verify compatibility with your model and serial number before purchasing. Confirm part number 537397001 appears on your saw's parts diagram before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Husqvarna","offers":[{"title":"Default Title","offer_id":53294874919219,"sku":"537397001","price":7.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/3996\/1139\/files\/2FB17515-8715-42D6-B854-A7DCD429AB53.jpg?v=1786379211","url":"https:\/\/swioutletstore.com\/products\/bar-adjustment-gear","provider":"SWI Outlet Store","version":"1.0","type":"link"}