{"id":2542,"date":"2026-06-15T08:13:07","date_gmt":"2026-06-15T08:13:07","guid":{"rendered":"https:\/\/www.hongtengdaparts.com\/?post_type=product&#038;p=2542"},"modified":"2026-06-15T08:13:07","modified_gmt":"2026-06-15T08:13:07","slug":"hitachi-zax670-3-zax870-3-pump-transfer-case-assembly","status":"publish","type":"product","link":"https:\/\/www.hongtengdaparts.com\/nl\/product\/hitachi-zax670-3-zax870-3-pump-transfer-case-assembly\/","title":{"rendered":"Hitachi ZAX670-3 \/ ZAX870-3 Pump Transfer Case Assembly \u2013 China Remanufactured (9276421)"},"content":{"rendered":"<h3>Detail Informatie<\/h3>\n<table>\n<tbody>\n<tr>\n<td><b>Herkomst<\/b>: China Gereviseerd<\/td>\n<td><b>Garantie<\/b>: 3-6 maanden afhankelijk van productspecificaties; wij verlenen geen garantie op originele en gebruikte producten.<\/td>\n<td><b>Minimale bestelhoeveelheid<\/b>: 1 stuk<\/td>\n<\/tr>\n<tr>\n<td><b>Monthly Output<\/b>: 300 pieces<\/td>\n<td><b>Verpakkingsgegevens<\/b>: Houten kist of op verzoek aangepast<\/td>\n<td><b>Betalingsvoorwaarden<\/b>: T\/T, XT, PayPal, Western Union<\/td>\n<\/tr>\n<tr>\n<td><b>Levertijd<\/b>: 5-8 werkdagen (afhankelijk van de ordersituatie)<\/td>\n<td><b>Verzendmethode<\/b>: Zeevracht, luchtvracht, of via DHL\/FEDEX\/TNT\/EMS<\/td>\n<td><b>Garantie<\/b>: Wij inspecteren het product en sturen gedetailleerde foto's naar de koper ter bevestiging.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Between your engine and your main pumps sits a component that nobody thinks about \u2013 until the machine stops moving.<\/span><\/strong><\/p>\n<h3><span class=\"\">The Three Silent Killers of Your ZAX670-3 \/ ZAX870-3 Transfer Case<\/span><\/h3>\n<p class=\"ds-markdown-paragraph\"><span class=\"\">On a 70\u201380 ton excavator, the pump transfer case (OEM 9276421) is the mechanical hub that splits engine torque to drive both main hydraulic pumps. It runs in oil, sealed from the outside, and requires no daily attention. That is precisely why failures are always sudden \u2013 and always expensive.<\/span><\/p>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Killer #1 \u2013 Bearing fatigue<\/span><\/strong><\/p>\n<p class=\"ds-markdown-paragraph\"><span class=\"\">Transfer case bearings spin at engine speed for tens of thousands of hours. Every revolution adds a tiny stress cycle. After 10,000\u201312,000 hours, even the best bearings develop micro\u2011cracks. The machine runs fine one day. The next day, a bearing cage lets go. The transfer case locks up, the pumps stop turning, and your excavator becomes a 70\u2011ton paperweight.<\/span><\/p>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">What we do:<\/span><\/strong><span class=\"\">\u00a0Every bearing in our remanufactured transfer case is replaced. Not inspected. Not \u201ctested.\u201d New. Always.<\/span><\/p>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Killer #2 \u2013 Contaminated oil<\/span><\/strong><\/p>\n<p class=\"ds-markdown-paragraph\"><span class=\"\">The transfer case shares no oil with the hydraulic system, but it can still get contaminated. Moisture from condensation, dust past a failed vent, or debris from a worn gear will turn the oil into grinding paste. Once the oil loses its film strength, gears and bearings wear at ten times the normal rate.<\/span><\/p>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">What we do:<\/span><\/strong><span class=\"\">\u00a0The housing is hot\u2011tanked and flushed. Gears are inspected for pitting \u2013 any gear with spalling is replaced. You get a clean gearbox with fresh oil, not a cleaned\u2011up failure.<\/span><\/p>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Killer #3 \u2013 Misalignment after pump or engine work<\/span><\/strong><\/p>\n<p class=\"ds-markdown-paragraph\"><span class=\"\">This is the most frustrating failure. A transfer case that was perfectly healthy fails within 200 hours of a pump replacement. The cause is almost always misalignment between the transfer case, engine flywheel housing, and main pumps. Even 0.5mm of offset will destroy bearings in weeks.<\/span><\/p>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">What we do:<\/span><\/strong><span class=\"\">\u00a0We cannot fix your installation \u2013 but we warn you. Every remanufactured transfer case ships with a bold\u2011print alignment guide. Follow it, and your transfer case will outlast the undercarriage.<\/span><\/p>\n<h3><span class=\"\">What You Are Buying<\/span><\/h3>\n<p class=\"ds-markdown-paragraph\"><span class=\"\">A remanufactured 9276421 transfer case assembly, built to original Hitachi specifications for the ZAX670\u20113 and ZAX870\u20113.<\/span><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">New bearings<\/span><\/strong><span class=\"\">\u00a0\u2013 every single one. No reused bearings.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Nieuwe afdichtingen en O-ringen<\/span><\/strong><span class=\"\">\u00a0\u2013 high\u2011temperature fluororubber (FKM).<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Gears inspected and reconditioned<\/span><\/strong><span class=\"\">\u00a0\u2013 pitted gears replaced.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Housing cleaned, crack\u2011inspected, and painted<\/span><\/strong><span class=\"\">\u00a0\u2013 like new.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Foto's voor verzending<\/span><\/strong><span class=\"\">\u00a0\u2013 you see the actual unit before packing.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Zware houten kist<\/span><\/strong><span class=\"\">\u00a0\u2013 fumigation\u2011free, export ready.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Levering binnen 5\u20138 werkdagen<\/span><\/strong><span class=\"\">\u00a0\u2013 from our Guangzhou warehouse.<\/span><\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"\">Who Needs This Transfer Case<\/span><\/h3>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Mijnbouwaannemers<\/span><\/strong><span class=\"\">\u00a0\u2013 You cannot afford a bearing seizure on the face. A reman transfer case with new bearings eliminates the gamble.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Fleet owners with multiple ZAX670\u20113 \/ ZAX870\u20113<\/span><\/strong><span class=\"\">\u00a0\u2013 Standardize on reman units. Predictable cost, predictable life, predictable scheduling.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Owners after a main pump failure<\/span><\/strong><span class=\"\">\u00a0\u2013 If your pump failed with debris, that debris went through the transfer case too. Do not skip it. Clean the transfer case or replace it.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Anyone who has just replaced main pumps<\/span><\/strong><span class=\"\">\u00a0\u2013 Alignment is critical. A reman transfer case gives you a fresh start.<\/span><\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"\">Installation \u2013 The One Page That Saves Your Machine<\/span><\/h3>\n<p class=\"ds-markdown-paragraph\"><span class=\"\">We include a printed alignment guide with every transfer case. Here is what it says:<\/span><\/p>\n<ol start=\"1\">\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Bolt the transfer case to the engine flywheel housing<\/span><\/strong><span class=\"\">\u00a0\u2013 do not force it. If the bolts do not slide in by hand, something is misaligned.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Check concentricity<\/span><\/strong><span class=\"\">\u00a0\u2013 use a dial indicator on the pump drive flange. Runout must be within 0.2mm. If it exceeds, shim or adjust.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Mount the main pumps<\/span><\/strong><span class=\"\">\u00a0\u2013 grease the splines lightly. Tighten bolts in a star pattern. Do not hammer the pump onto the spline.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Fill with correct oil<\/span><\/strong><span class=\"\">\u00a0\u2013 refer to your Hitachi service manual (typically heavy\u2011duty gear oil, API GL\u20115, viscosity as specified). Do not overfill.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Run without load first<\/span><\/strong><span class=\"\">\u00a0\u2013 idle for 5 minutes, listen for unusual noise. If it sounds wrong, stop and recheck alignment.<\/span><\/p>\n<\/li>\n<\/ol>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">The most common mistake:<\/span><\/strong><span class=\"\">\u00a0Assuming the old transfer case was aligned, so the new one will be too. Alignment changes when you remove and replace components. Check it every time.<\/span><\/p>\n<h3><span class=\"\">Waarom Hongtengda-onderdelen<\/span><\/h3>\n<p class=\"ds-markdown-paragraph\"><span class=\"\">We have been remanufacturing Hitachi drivetrain components since 2001. The ZAX670\u20113 and ZAX870\u20113 are proven machines, but their transfer cases are now reaching the end of their natural life. New OEM units are expensive and often have long lead times. Used units are a gamble \u2013 you have no idea how many hours remain.<\/span><\/p>\n<p class=\"ds-markdown-paragraph\"><span class=\"\">A remanufactured transfer case from HTD gives you new bearings, new seals, reconditioned gears, and a clean housing. You get the confidence of a fresh start without the new\u2011OEM price.<\/span><\/p>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Garantienota:<\/span><\/strong><span class=\"\">\u00a03\u20116 months depending on product details.\u00a0<\/span><strong><span class=\"\">We do not provide warranty for original used or remanufactured parts.<\/span><\/strong><span class=\"\">\u00a0Our promise is in the work: new bearings, proper assembly, and pre\u2011shipment photos. For warranty\u2011covered options, ask about new aftermarket units.<\/span><\/p>\n<h3><span class=\"\">Before You Order<\/span><\/h3>\n<p class=\"ds-markdown-paragraph\"><span class=\"\">Stuur ons:<\/span><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Your ZAX670\u20113 or ZAX870\u20113 machine serial number<\/span><\/strong><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">A photo of the old transfer case<\/span><\/strong><span class=\"\">\u00a0(or its nameplate)<\/span><\/p>\n<\/li>\n<\/ul>\n<p class=\"ds-markdown-paragraph\"><span class=\"\">We will confirm fitment and provide a quote within 24 hours.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<table>\n<tbody>\n<tr>\n<td><b>Toepasselijk model<\/b><\/td>\n<td>ZAX670-3, ZAX870-3 Transfer Case<\/td>\n<\/tr>\n<tr>\n<td><b>Naam<\/b><\/td>\n<td>Hitachi Hydraulic Pump Transfer Case Assembly<\/td>\n<\/tr>\n<tr>\n<td><b>Onderdeelnummer<\/b><\/td>\n<td>9276421<\/td>\n<\/tr>\n<tr>\n<td><b>Product Type<\/b><\/td>\n<td>Hydraulic Series<\/td>\n<\/tr>\n<tr>\n<td><b>Categorie<\/b><\/td>\n<td>Hydraulisch Systeem<\/td>\n<\/tr>\n<tr>\n<td><b>Merk<\/b><\/td>\n<td>HTD<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"featured_media":2543,"template":"","meta":[],"product_brand":[],"product_cat":[68],"product_tag":[],"class_list":["post-2542","product","type-product","status-publish","has-post-thumbnail","product_cat-hitachi-hydraulic-pump","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.hongtengdaparts.com\/nl\/wp-json\/wp\/v2\/product\/2542","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hongtengdaparts.com\/nl\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.hongtengdaparts.com\/nl\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hongtengdaparts.com\/nl\/wp-json\/wp\/v2\/media\/2543"}],"wp:attachment":[{"href":"https:\/\/www.hongtengdaparts.com\/nl\/wp-json\/wp\/v2\/media?parent=2542"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.hongtengdaparts.com\/nl\/wp-json\/wp\/v2\/product_brand?post=2542"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.hongtengdaparts.com\/nl\/wp-json\/wp\/v2\/product_cat?post=2542"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.hongtengdaparts.com\/nl\/wp-json\/wp\/v2\/product_tag?post=2542"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}