{"product_id":"121-7639-steering-axle-seal-ring","title":"121-7639 Steering Axle Seal Ring For Caterpillar | Ruijueparts","description":"\u003ch2\u003eProduct Description\u003c\/h2\u003e\u003cp\u003e121-7639 is an aftermarket seal ring referenced for Caterpillar steering-axle applications on selected wheeled excavators. It should be ordered separately from backup ring 121-7637, even where both appear in the same axle repair. Match the exact assembly and sealing position before purchase. Ruijueparts can review a multi-part axle list and keep the ring references distinct, with neutral or customer-specified packaging that helps workshops organise parts before dismantling the machine.\u003c\/p\u003e\u003ch2\u003eItem specifics\u003c\/h2\u003e\u003cp\u003ePart Number \/ Ordering Reference: 121-7639\u003c\/p\u003e\u003cp\u003eCompatible Brand: Caterpillar\u003c\/p\u003e\u003cp\u003eType: Steering Axle Seal Ring\u003c\/p\u003e\u003cp\u003eCondition: New\u003c\/p\u003e\u003cp\u003eManufacturer Type: Aftermarket\u003c\/p\u003e\u003ch3\u003eApplication\u003c\/h3\u003e\u003cp\u003eWheeled Excavator: M312 \/ M313C \/ M313D \/ M314F \/ M315 \/ M315C \/ M315D2 reference applications. Verify the steering-axle group and seal position.\u003c\/p\u003e\u003cp\u003eFunction: Seals the specified steering-axle interface as the axle drives and steers the machine.\u003c\/p\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eQ1: Does this replace the backup ring as well?\u003c\/h3\u003e\u003cp\u003eNo. The backup ring has a separate reference and should be checked in the axle diagram.\u003c\/p\u003e\u003ch3\u003eQ2: Are all rings on an M313D the same size?\u003c\/h3\u003e\u003cp\u003eNo. Use the individual part number and groove position, rather than the machine model alone.\u003c\/p\u003e\u003ch3\u003eQ3: What should I include in an axle repair enquiry?\u003c\/h3\u003e\u003cp\u003eSend the axle identification, machine serial number and marked diagram showing each required ring.\u003c\/p\u003e\u003cp\u003eAftermarket replacement supplied by Ruijueparts. Referenced manufacturer names and numbers identify applications; this is not a genuine manufacturer product.\u003c\/p\u003e","brand":"RuiJueParts","offers":[{"title":"Default Title","offer_id":52932331274471,"sku":"121-7639","price":8.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5251\/9399\/files\/1217639.jpg?v=1793163493","url":"https:\/\/www.ruijueparts.com\/products\/121-7639-steering-axle-seal-ring","provider":"RuiJueParts","version":"1.0","type":"link"}