{"product_id":"k949721-standard-piston","title":"K949721  Standard Piston fits David Brown Tractor 770 1290 990","description":"\u003ch3\u003eOne New Aftermarket Replacement Standard Piston for David Brown (Fits Case) Tractors\u003c\/h3\u003e\u003cp\u003eThis standard-size replacement piston fits the David Brown AD3\/49 and AD4\/49 diesel engines used in the 770, 990, and 1290 tractor models. It is a piston-only part -- rings are not included. The dish-top crown and F3 chamber type are correct for the original engine design. Note: for the David Brown 1290, this piston applies up to serial number 11052360.\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e  \u003cli\u003eSize: Standard\u003c\/li\u003e  \u003cli\u003eCrown Type: Dish Top\u003c\/li\u003e  \u003cli\u003eChamber Type: F3\u003c\/li\u003e  \u003cli\u003eChamber: 2.31 in (58.72 mm)\u003c\/li\u003e  \u003cli\u003eCompression Height: 2.62 in (66.67 mm)\u003c\/li\u003e  \u003cli\u003ePiston Length \/ Height: 4.40 in (111.80 mm \/ 111.93 mm)\u003c\/li\u003e  \u003cli\u003eNumber of Rings: 4 (rings not included)\u003c\/li\u003e  \u003cli\u003eBore: 99.54 mm (standard)\u003c\/li\u003e  \u003cli\u003ePin Diameter: 31.75 mm\u003c\/li\u003e  \u003cli\u003ePiston Only - Rings Not Included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatible Models\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eDavid Brown Tractors:\u003c\/strong\u003e 770, 990, 1290 (up to S\/N 11052360)\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDavid Brown Engines:\u003c\/strong\u003e AD3\/49, AD4\/49\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFits Case Tractors (IH):\u003c\/strong\u003e 990, 1290\u003c\/p\u003e\u003ch4\u003eReplaces Part Number(s):\u003c\/h4\u003e\u003cp\u003eK949721, K261707, PA769, S.57505, S.57505-A, 32-80, 32-80-A\u003c\/p\u003e\u003cp\u003eNew aftermarket replacement part - not remanufactured, not used.\u003c\/p\u003e","brand":"Reliable Aftermarket Parts, Inc®","offers":[{"title":"Default Title","offer_id":17723010187315,"sku":"K949721","price":69.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0079\/4060\/3955\/files\/K949721_01.jpg?v=1774535695","url":"https:\/\/www.reliableaftermarketparts.co.uk\/products\/k949721-standard-piston","provider":"Reliable Aftermarket Parts, Inc®","version":"1.0","type":"link"}