{"id":54275,"date":"2026-02-24T12:03:35","date_gmt":"2026-02-24T17:03:35","guid":{"rendered":"https:\/\/allparts.expert\/parts\/uncategorized\/cat-777c-engine-ar-1215777-caterpillar-121-5777-mining\/"},"modified":"2026-02-24T12:03:38","modified_gmt":"2026-02-24T17:03:38","slug":"cat-777c-engine-ar-1215777-caterpillar-121-5777-mining","status":"publish","type":"product","link":"https:\/\/allparts.expert\/es\/parts\/mining\/cat-777c-engine-ar-1215777-caterpillar-121-5777-mining\/","title":{"rendered":"CAT 777C ENGINE AR 1215777 | Caterpillar 121-5777 | Mining"},"content":{"rendered":"<p>Title<br \/>\nCaterpillar 121-5777 Engine Ar 1215777 | Fits 777C, 776C Excavators<\/p>\n<p>\u2e3b<\/p>\n<p>Opening Paragraph<br \/>\nThe Caterpillar 121-5777 Engine Ar 1215777 is a precision-engineered OEM replacement component designed for 777C and 776C excavators operating in mining and heavy construction environments. Built for structural durability and exact fitment, this engine ar 1215777 supports critical assemblies to ensure reliable performance and reduced downtime.<\/p>\n<p>\u2e3b<\/p>\n<p>Common Applications<br \/>\nThis Caterpillar 121-5777 engine ar 1215777 is essential for:<br \/>\n&#8211; Professional maintenance of CAT excavators.<br \/>\n&#8211; Direct replacement of worn structural and pivot components.<br \/>\n&#8211; Heavy-duty mining and earthmoving operations.<br \/>\n&#8211; Maintaining proper alignment in equipment linkage systems.<\/p>\n<p>\u2e3b<\/p>\n<p>Fits The Following Models<br \/>\n&#8211; CAT 777C Excavator<br \/>\n&#8211; CAT 776C Excavator<br \/>\n(Verify fitment with your specific serial number.)<\/p>\n<p>\u2e3b<\/p>\n<p>OEM Reference<br \/>\nPart Number: 121-5777<br \/>\nBrand: Caterpillar<br \/>\nCategory: Mining<br \/>\nMachine Type: Hydraulic Excavator<br \/>\nCondition: OEM \/ Genuine-Style Replacement<\/p>\n<p>\u2e3b<\/p>\n<p>Product Details and Availability<br \/>\nIn Stock (if confirmed).<br \/>\nGlobal Shipping Available.<br \/>\nSerial Number Verification Support.<br \/>\nRequest Fast Quote for Current Market Pricing.<\/p>\n<p>Access full technical specifications and availability here:<br \/>\n<a href=\"https:\/\/allparts.expert\/es\/parts\/mining\/cat-777c-engine-ar-1215777-caterpillar-121-5777-mining\/\">https:\/\/allparts.expert\/parts\/mining\/cat-777c-engine-ar-1215777-caterpillar-121-5777-mining\/<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Direct OEM Genuine<br \/>\nMulti-Model Compatibility<br \/>\nHeavy-Duty Mining Grade<br \/>\nSerial Verification Available<br \/>\nWorldwide Shipping<\/p>","protected":false},"featured_media":54222,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_joinchat":[]},"product_brand":[36],"machine-type":[27696],"model_no":[2541,2542],"product_cat":[144],"product_tag":[361617,361622,361614,56766,49115,64889,246364,361613,361624,361616,361621,361615,361619,361618,361612,303894,361623,303900,361620],"class_list":{"0":"post-54275","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-caterpillar","7":"machine-type-off-highway-truck","8":"model_no-776c","9":"model_no-777c","10":"product_cat-mining","11":"product_tag-121-5777-caterpillar-engine-replacement","12":"product_tag-121-5777-engine-replacement-parts","13":"product_tag-1215777-caterpillar-engine-ar","14":"product_tag-2tk-776c-caterpillar-parts","15":"product_tag-2tk-776c-off-highway-truck-parts","16":"product_tag-4xj-777c-off-highway-truck-parts","17":"product_tag-4xj-777c-spare-parts","18":"product_tag-cat-121-5777-replacement","19":"product_tag-cat-1215777-engine-ar-parts","20":"product_tag-cat-2tk-776c-components","21":"product_tag-cat-2tk-776c-spare-parts","22":"product_tag-cat-4xj-777c-components","23":"product_tag-cat-engine-121-5777","24":"product_tag-caterpillar-121-5777-ar-parts","25":"product_tag-caterpillar-121-5777-engine-parts","26":"product_tag-caterpillar-2tk-776c-truck-parts","27":"product_tag-caterpillar-4xj-777c-engine-components","28":"product_tag-caterpillar-4xj-777c-truck-parts","29":"product_tag-caterpillar-truck-4xj-777c","31":"first","32":"instock","33":"shipping-taxable","34":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/allparts.expert\/es\/wp-json\/wp\/v2\/product\/54275","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/allparts.expert\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/allparts.expert\/es\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/allparts.expert\/es\/wp-json\/wp\/v2\/comments?post=54275"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/allparts.expert\/es\/wp-json\/wp\/v2\/media\/54222"}],"wp:attachment":[{"href":"https:\/\/allparts.expert\/es\/wp-json\/wp\/v2\/media?parent=54275"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/allparts.expert\/es\/wp-json\/wp\/v2\/product_brand?post=54275"},{"taxonomy":"machine-type","embeddable":true,"href":"https:\/\/allparts.expert\/es\/wp-json\/wp\/v2\/machine-type?post=54275"},{"taxonomy":"model_no","embeddable":true,"href":"https:\/\/allparts.expert\/es\/wp-json\/wp\/v2\/model_no?post=54275"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/allparts.expert\/es\/wp-json\/wp\/v2\/product_cat?post=54275"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/allparts.expert\/es\/wp-json\/wp\/v2\/product_tag?post=54275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}