Gear pumps are the unglamorous end of a hydraulic fan circuit. They are simple, they are robust, and when a machine starts running hot most workshops look everywhere except at them. On SDLG heavy machines of the 500 and 600 class the fan drive is fed by a Casappa KP-group unit, and when its clearances open up the symptom is gradual enough that operators adapt before anyone measures anything.<\/p>\n
The pump photographed here carries the code KP30A8K9-LMB\/B-HSC<\/strong>, with housing castings HSX and XSH and a stamped batch marking. Decoding what that string does and does not tell you matters when ordering:<\/p>\n Because the displacement is not visible on this code, send a photograph of your old plate. Guessing the size from the machine model is how these orders go wrong.<\/p>\n Supplied for SDLG (Shandong Lingong Construction Machinery) 500 and 600 class machines where the fan drive is fed from a Casappa KP-group gear pump. If your parts book gives a different manufacturer or an aluminium-body Polaris-type unit instead, tell us before we pack: the mounting faces differ, and a cast iron pump does not always drop into an aluminium bracket without adapter work.<\/p>\n An external gear pump has one wear mechanism that matters here: internal leakage across the gear tip and side clearances grows as those surfaces are scoured by particles, and the pump’s delivered flow falls below what the fan motor needs at a given engine speed. Unlike a variable displacement axial piston pump, a gear pump gives you no control trick to hide it. The fan simply stops reaching speed when the machine is working hard at low idle, which is exactly the condition where cooling demand peaks.<\/p>\n Two things follow. First, measure rather than guess: run the flow and pressure tests in our hydraulic fan pump diagnosis guide<\/a> before ordering. Second, treat the oil, because a gear pump is the component most likely to be killed twice. Casappa’s own installation guidance for this class of pump calls for filtration sized to keep the circuit clean and for the suction strainer to be checked; as a working target for mobile equipment circuits of this type, hold ISO 4406 in the region of 18\/16\/13 for axial piston components in the same machine and change the return element at every fan circuit intervention.<\/p>\n If the machine still runs hot with a new pump fitted, the fan motor and the circuit’s check valves are the next items, and our check valve article<\/a> covers the diagnosis that finds it. Procurement teams comparing pump specifications across brands should read the pump buyer’s and specification guide<\/a> first.<\/p>\n Minimum order one piece, around 1,000 units a month available. New aftermarket units carry a three to six month warranty as stated on your proforma invoice. Each pump is inspected, photographed against your order and packed in a wooden case or to your specification, with delivery 5 to 8 working days from payment subject to stock. Payment by L\/C, T\/T, PayPal or Western Union; shipping by sea, air or express courier. Browse the rest of the fan drive range under hydraulischer Gebl\u00e4semotor<\/a>.<\/p>","protected":false},"excerpt":{"rendered":" Part:<\/strong> Casappa KP-group external gear pump, nameplate code KP30A8K9-LMB\/B-HSC, used in the fan drive circuit of SDLG 500 and 600 class machines.<\/p>\n Supplied as:<\/strong> new HTD-brand replacement, made in China, cast iron body with zinc plated mounting flange. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.<\/p>\n Wichtig:<\/strong> the model string on this unit does not state geometric displacement, so we match it against your old pump’s plate and port layout rather than by the SDLG model name alone.<\/p>","protected":false},"featured_media":4313,"template":"","meta":[],"product_brand":[],"product_cat":[37,572],"product_tag":[590,594,167,591,592,593],"class_list":["post-4326","product","type-product","status-publish","has-post-thumbnail","product_cat-hydraulic-fan-motor","product_cat-sdlg-fan-motor","product_tag-casappa","product_tag-fan-drive-pump","product_tag-gear-pump","product_tag-kp30","product_tag-kp30a8k9","product_tag-sdlg","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.hongtengdaparts.com\/de\/wp-json\/wp\/v2\/product\/4326","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hongtengdaparts.com\/de\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.hongtengdaparts.com\/de\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hongtengdaparts.com\/de\/wp-json\/wp\/v2\/media\/4313"}],"wp:attachment":[{"href":"https:\/\/www.hongtengdaparts.com\/de\/wp-json\/wp\/v2\/media?parent=4326"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.hongtengdaparts.com\/de\/wp-json\/wp\/v2\/product_brand?post=4326"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.hongtengdaparts.com\/de\/wp-json\/wp\/v2\/product_cat?post=4326"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.hongtengdaparts.com\/de\/wp-json\/wp\/v2\/product_tag?post=4326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n
Anwendung<\/h2>\n
Why a gear pump makes the machine hot<\/h2>\n
Fitting notes<\/h2>\n
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Terms<\/h2>\n