{"id":4273,"date":"2026-10-26T03:01:59","date_gmt":"2026-10-26T03:01:59","guid":{"rendered":"https:\/\/www.hongtengdaparts.com\/product\/hydraulic-fan-motor-doosan-dx520-cooling-fan\/"},"modified":"2026-10-26T03:19:05","modified_gmt":"2026-10-26T03:19:05","slug":"hydraulic-fan-motor-doosan-dx520-cooling-fan","status":"publish","type":"product","link":"https:\/\/www.hongtengdaparts.com\/pt\/product\/hydraulic-fan-motor-doosan-dx520-cooling-fan\/","title":{"rendered":"Hydraulic Fan Motor for Doosan DX520 DX520LC Excavator Cooling Fan"},"content":{"rendered":"<p>The DX520 is the awkward one in the Doosan range. Depending on build year, market and where the machine came from, you will find at least two different fan motors fitted to the same cooling fan, and both get ordered under the search term DX520 fan motor. Getting the wrong one is the most common complaint we see from workshops that ordered from a photograph alone.<\/p>\n<h2>Which DX520 motor this listing covers<\/h2>\n<p>This is the domed-housing unit. You can identify it on the machine without removing anything:<\/p>\n<ul>\n<li><strong>Housing shape.<\/strong> A rounded bell or beehive cast cover sits on top of a cylindrical mid-section. The alternative units in this class have a flatter, more angular cover.<\/li>\n<li><strong>Ports.<\/strong> Two large capped hydraulic connections at the base, one left and one right, which is the inlet and outlet pair for a reversible motor.<\/li>\n<li><strong>Mounting.<\/strong> A wide flat flange with four bolt holes sits between the upper dome and the lower port section.<\/li>\n<li><strong>No external regulator.<\/strong> The top is smooth and sealed. There is no proportional solenoid, no adjustment screw and no servo piston on the housing, because this is the motor half of the circuit, not the pump.<\/li>\n<\/ul>\n<h2>Telling a fan motor from a fan pump when the sticker is gone<\/h2>\n<p>Doosan factory labels normally carry the part name in Chinese characters, together with the machine model and the part number. That is no help once the label has faded, been torn off, or been replaced by a previous owner, so identify the unit by its hardware instead. A fan pump has a drive shaft with a pilot flange on the input side plus some form of control assembly on the body: a regulator block, a solenoid, an adjustment screw, or a pressure and flow valve. A fan motor has no control hardware at all, has two work ports of similar size, and usually carries a case drain line that runs back to the tank. If you find a third small line or a banjo fitting on the housing, you are looking at a pump or at a motor with an internal brake, and this listing is not the part you need.<\/p>\n<h2>Fitment and the numbers you may already have<\/h2>\n<p>Supplied for the Doosan DX520 and DX520LC crawler excavators. Buyers arriving here often hold one of the following numbers, and they are not interchangeable:<\/p>\n<ul>\n<li><strong>K1057295<\/strong>, listed mainly for DX380, DX420 and DX500 and fitted to a square-flange motor with an aluminium side housing. We stock that under our <a href=\"https:\/\/www.hongtengdaparts.com\/pt\/produto\/k1057295-hydraulic-fan-motor-doosan-dx380-dx420-dx500\/\">K1057295 hydraulic fan motor<\/a> listing.<\/li>\n<li><strong>K1006254<\/strong>, which trade catalogues attach to DX420LC, DX480LC and DX520LC machines. Treat this as a lead, not a certainty: cross-references in the Doosan aftermarket are frequently wrong by one generation.<\/li>\n<li>No number at all, which is normal on a machine that has already had one replacement.<\/li>\n<\/ul>\n<p>Because of that overlap we do not ship this part on the strength of a model name. We ship it against your photographs and measurements.<\/p>\n<h2>Before you condemn the motor<\/h2>\n<p>Fan motors are blamed for heat faults they did not cause more often than almost any other part in the cooling circuit. Run the tests in our <a href=\"https:\/\/www.hongtengdaparts.com\/pt\/diagnostico-do-motor-hidraulico-do-ventilador-de-escavadeira\/\">hydraulic fan motor diagnosis guide<\/a> first: check the radiator core for dust lock between the fins, confirm the fan belt and hub are not slipping, prove the coolant temperature sensor is reporting truth by testing it (<a href=\"https:\/\/www.hongtengdaparts.com\/pt\/teste-do-sensor-de-temperatura-do-liquido-de-arrefecimento-da-escavadeira\/\">sensor testing procedure here<\/a>), and only then move on to the motor and the pump feeding it. If the fan turns but stalls under thermal load, the pump or its regulator is the more likely culprit.<\/p>\n<h2>What to send so we quote the right unit<\/h2>\n<p>Six items, and a quotation normally comes back the same working day:<\/p>\n<ol>\n<li>Machine model and full serial number from the data plate, including the prefix. Doosan changed part numbering between generations, and the serial tells us which book to read.<\/li>\n<li>Photographs of the old motor from at least four sides, plus one straight-on shot of the mounting flange face.<\/li>\n<li>Any number that is legible on the housing, cast into the aluminium or stamped on a plate. Cast marks are as useful as sticker numbers.<\/li>\n<li>Bolt count and bolt circle diameter of the mounting flange, measured in millimetres.<\/li>\n<li>Spline count and shaft diameter, or a photo of a straight edge across the shaft end.<\/li>\n<li>Thread size or flange specification of the two work ports and the case drain line.<\/li>\n<\/ol>\n<p>We photograph your matched unit against those details before packing, and we hold the shipment until you confirm the pictures. Other Doosan wear items are listed in our <a href=\"https:\/\/www.hongtengdaparts.com\/pt\/categoria-produto\/valvula-de-controle-principal-da-escavadeira\/doosan\/\">Doosan parts section<\/a>, e o completo <a href=\"https:\/\/www.hongtengdaparts.com\/pt\/categoria-produto\/motor-do-ventilador-hidraulico\/\">hydraulic fan motor range<\/a> covers the CAT, Komatsu, Hitachi and Volvo equivalents.<\/p>\n<p><em>Photography note:<\/em> this variant is currently represented by a single studio image of the actual unit we ship. Additional angles are added to the listing as soon as the next production batch is photographed, so ask if you want a fresh shot of the exact unit being packed for you.<\/p>","protected":false},"excerpt":{"rendered":"<p><strong>Aplica\u00e7\u00e3o:<\/strong> cooling fan drive motor for Doosan \/ Develon DX520 and DX520LC excavators, domed cast housing with twin base ports.<\/p>\n<p><strong>Supplied as:<\/strong> new aftermarket unit, HTD brand, made in China. MOQ 1 piece, wooden case, dispatch in 5 to 8 working days.<\/p>\n<p><strong>Note on part numbers:<\/strong> DX520 machines in the field carry more than one fan motor variant. This listing is the domed-housing unit, matched from photographs and measurements rather than from a stamped number.<\/p>","protected":false},"featured_media":4256,"template":"","meta":[],"product_brand":[],"product_cat":[547,37],"product_tag":[553,245,551,558,552,183],"class_list":["post-4273","product","type-product","status-publish","has-post-thumbnail","product_cat-doosan-fan-motor","product_cat-hydraulic-fan-motor","product_tag-cooling-fan-motor","product_tag-doosan","product_tag-dx520","product_tag-dx520lc","product_tag-fan-motor","product_tag-hydraulic-fan-motor","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.hongtengdaparts.com\/pt\/wp-json\/wp\/v2\/product\/4273","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hongtengdaparts.com\/pt\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.hongtengdaparts.com\/pt\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hongtengdaparts.com\/pt\/wp-json\/wp\/v2\/media\/4256"}],"wp:attachment":[{"href":"https:\/\/www.hongtengdaparts.com\/pt\/wp-json\/wp\/v2\/media?parent=4273"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.hongtengdaparts.com\/pt\/wp-json\/wp\/v2\/product_brand?post=4273"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.hongtengdaparts.com\/pt\/wp-json\/wp\/v2\/product_cat?post=4273"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.hongtengdaparts.com\/pt\/wp-json\/wp\/v2\/product_tag?post=4273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}