{"product_id":"ar-rka4g40hn-pressure-washer-pump-4-0-gpm-4000-psi-24mm-short-shaft-1-inlet","title":"AR RKA4G40HN Pressure Washer Pump – 4.0 GPM 4000 PSI 24mm Short Shaft 1\" Inlet","description":"\u003cdiv class=\"\" data-turn-id-container=\"d0741d68-9173-417a-8a77-5796d5b5d3bb\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-(--sticky-padding-top)\" dir=\"auto\" data-turn-id=\"d0741d68-9173-417a-8a77-5796d5b5d3bb\" data-turn-id-container=\"d0741d68-9173-417a-8a77-5796d5b5d3bb\" data-testid=\"conversation-turn-99\" data-turn=\"user\"\u003e\u003c\/section\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a41e0a9-6a1c-83ea-8a2f-44e0120c15c3-89\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6a41e0a9-6a1c-83ea-8a2f-44e0120c15c3-89\" data-turn-id-container=\"request-6a41e0a9-6a1c-83ea-8a2f-44e0120c15c3-89\" data-testid=\"conversation-turn-100\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"9878286a-f5e1-4b8a-b988-5cf488bee685\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp data-start=\"0\" data-end=\"206\"\u003e\u003cstrong data-start=\"0\" data-end=\"16\"\u003ePart Number:\u003c\/strong\u003e RKA4G40HN\u003cbr data-start=\"26\" data-end=\"29\"\u003e\u003cstrong data-start=\"29\" data-end=\"42\"\u003eCategory:\u003c\/strong\u003e Pressure Washer Pumps → Triplex Pumps → Belt Drive Pressure Washer Pumps\u003cbr data-start=\"115\" data-end=\"118\"\u003e\u003cstrong data-start=\"118\" data-end=\"127\"\u003eType:\u003c\/strong\u003e AR RKA4G40HN Pressure Washer Pump – 4.0 GPM 4000 PSI 24mm Short Shaft 1\" Inlet\u003c\/p\u003e\n\u003chr data-start=\"208\" data-end=\"211\"\u003e\n\u003cp data-start=\"295\" data-end=\"736\"\u003eThe \u003cstrong data-start=\"299\" data-end=\"354\"\u003eAR RKA4G40HN Pressure Washer Pump (Part #RKA4G40HN)\u003c\/strong\u003e is a genuine OEM triplex plunger pump engineered for demanding commercial and industrial pressure washing applications. Built by \u003cstrong data-start=\"484\" data-end=\"509\"\u003eAnnovi Reverberi (AR)\u003c\/strong\u003e, this heavy-duty pump delivers \u003cstrong data-start=\"541\" data-end=\"565\"\u003e4.0 GPM at 4,000 PSI\u003c\/strong\u003e, providing exceptional cleaning performance for fleet washing, construction equipment, agriculture, manufacturing facilities, and other high-pressure cleaning operations.\u003c\/p\u003e\n\u003chr data-start=\"1372\" data-end=\"1375\"\u003e\n\u003ch1 data-section-id=\"1oef6j8\" data-start=\"1377\" data-end=\"1402\"\u003eKey Features \u0026amp; Benefits\u003c\/h1\u003e\n\u003cul data-start=\"1404\" data-end=\"1952\"\u003e\n\u003cli data-section-id=\"xeztqs\" data-start=\"1404\" data-end=\"1468\"\u003eGenuine AR (Annovi Reverberi) OEM triplex pressure washer pump\u003c\/li\u003e\n\u003cli data-section-id=\"1qwfotr\" data-start=\"1469\" data-end=\"1493\"\u003ePart Number: RKA4G40HN\u003c\/li\u003e\n\u003cli data-section-id=\"19tw6a9\" data-start=\"1494\" data-end=\"1529\"\u003eHeavy-duty triplex plunger design\u003c\/li\u003e\n\u003cli data-section-id=\"2eg04n\" data-start=\"1530\" data-end=\"1567\"\u003eDelivers up to 4.0 GPM at 4,000 PSI\u003c\/li\u003e\n\u003cli data-section-id=\"s0yvus\" data-start=\"1568\" data-end=\"1625\"\u003eLow-speed 1,750 RPM operation for extended service life\u003c\/li\u003e\n\u003cli data-section-id=\"edjah0\" data-start=\"1626\" data-end=\"1659\"\u003e24 mm short shaft configuration\u003c\/li\u003e\n\u003cli data-section-id=\"1omgxdj\" data-start=\"1660\" data-end=\"1680\"\u003e1-inch water inlet\u003c\/li\u003e\n\u003cli data-section-id=\"q8vjgf\" data-start=\"1681\" data-end=\"1732\"\u003eCompatible with belt-drive and gear-drive systems\u003c\/li\u003e\n\u003cli data-section-id=\"17wrkuh\" data-start=\"1733\" data-end=\"1764\"\u003eRequires approximately 11 BHP\u003c\/li\u003e\n\u003cli data-section-id=\"d3o0qo\" data-start=\"1765\" data-end=\"1802\"\u003eSuitable for engines up to 14.5 GHP\u003c\/li\u003e\n\u003cli data-section-id=\"n3cabi\" data-start=\"1803\" data-end=\"1855\"\u003eSmooth, efficient operation with reduced vibration\u003c\/li\u003e\n\u003cli data-section-id=\"dyoa7y\" data-start=\"1856\" data-end=\"1911\"\u003eDesigned for continuous commercial and industrial use\u003c\/li\u003e\n\u003cli data-section-id=\"1cnwj99\" data-start=\"1912\" data-end=\"1952\"\u003eOEM-quality durability and performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1954\" data-end=\"1957\"\u003e\n\u003ch1 data-section-id=\"zjxypn\" data-start=\"1959\" data-end=\"1985\"\u003eTechnical Specifications\u003c\/h1\u003e\n\u003cp data-start=\"1987\" data-end=\"2013\"\u003e\u003cstrong data-start=\"1987\" data-end=\"2003\"\u003ePart Number:\u003c\/strong\u003e RKA4G40HN\u003c\/p\u003e\n\u003cp data-start=\"2015\" data-end=\"2040\"\u003e\u003cstrong data-start=\"2015\" data-end=\"2030\"\u003ePump Model:\u003c\/strong\u003e RKA4G40HN\u003c\/p\u003e\n\u003cp data-start=\"2042\" data-end=\"2081\"\u003e\u003cstrong data-start=\"2042\" data-end=\"2059\"\u003eManufacturer:\u003c\/strong\u003e AR (Annovi Reverberi)\u003c\/p\u003e\n\u003cp data-start=\"2083\" data-end=\"2129\"\u003e\u003cstrong data-start=\"2083\" data-end=\"2100\"\u003eProduct Type:\u003c\/strong\u003e Triplex Pressure Washer Pump\u003c\/p\u003e\n\u003cp data-start=\"2131\" data-end=\"2161\"\u003e\u003cstrong data-start=\"2131\" data-end=\"2153\"\u003eMaximum Flow Rate:\u003c\/strong\u003e 4.0 GPM\u003c\/p\u003e\n\u003cp data-start=\"2163\" data-end=\"2194\"\u003e\u003cstrong data-start=\"2163\" data-end=\"2184\"\u003eMaximum Pressure:\u003c\/strong\u003e 4,000 PSI\u003c\/p\u003e\n\u003cp data-start=\"2196\" data-end=\"2229\"\u003e\u003cstrong data-start=\"2196\" data-end=\"2219\"\u003eMaximum Pump Speed:\u003c\/strong\u003e 1,750 RPM\u003c\/p\u003e\n\u003cp data-start=\"2231\" data-end=\"2261\"\u003e\u003cstrong data-start=\"2231\" data-end=\"2258\"\u003eBrake Horsepower (BHP):\u003c\/strong\u003e 11\u003c\/p\u003e\n\u003cp data-start=\"2263\" data-end=\"2293\"\u003e\u003cstrong data-start=\"2263\" data-end=\"2288\"\u003eGas Horsepower (GHP):\u003c\/strong\u003e 14.5\u003c\/p\u003e\n\u003cp data-start=\"2295\" data-end=\"2328\"\u003e\u003cstrong data-start=\"2295\" data-end=\"2310\"\u003eShaft Size:\u003c\/strong\u003e 24 mm Short Shaft\u003c\/p\u003e\n\u003cp data-start=\"2330\" data-end=\"2349\"\u003e\u003cstrong data-start=\"2330\" data-end=\"2346\"\u003eWater Inlet:\u003c\/strong\u003e 1\"\u003c\/p\u003e\n\u003cp data-start=\"2351\" data-end=\"2369\"\u003e\u003cstrong data-start=\"2351\" data-end=\"2362\"\u003eWeight:\u003c\/strong\u003e 19 lbs\u003c\/p\u003e\n\u003cp data-start=\"2371\" data-end=\"2395\"\u003e\u003cstrong data-start=\"2371\" data-end=\"2391\"\u003eOEM Replacement:\u003c\/strong\u003e Yes\u003c\/p\u003e\n\u003chr data-start=\"2397\" data-end=\"2400\"\u003e\n\u003ch1 data-section-id=\"1w7a361\" data-start=\"2402\" data-end=\"2427\"\u003eCompatible Applications\u003c\/h1\u003e\n\u003cp data-start=\"2429\" data-end=\"2496\"\u003eDesigned for use with compatible pressure washer systems featuring:\u003c\/p\u003e\n\u003cul data-start=\"2498\" data-end=\"2785\"\u003e\n\u003cli data-section-id=\"unkef0\" data-start=\"2498\" data-end=\"2525\"\u003e24 mm shaft drive systems\u003c\/li\u003e\n\u003cli data-section-id=\"e1w54q\" data-start=\"2526\" data-end=\"2555\"\u003eBelt-drive pressure washers\u003c\/li\u003e\n\u003cli data-section-id=\"xch5v8\" data-start=\"2556\" data-end=\"2585\"\u003eGear-drive pressure washers\u003c\/li\u003e\n\u003cli data-section-id=\"1ftw8hk\" data-start=\"2586\" data-end=\"2615\"\u003eCommercial pressure washers\u003c\/li\u003e\n\u003cli data-section-id=\"1wpc0sg\" data-start=\"2616\" data-end=\"2647\"\u003eIndustrial cleaning equipment\u003c\/li\u003e\n\u003cli data-section-id=\"1hb3h7x\" data-start=\"2648\" data-end=\"2671\"\u003eFleet washing systems\u003c\/li\u003e\n\u003cli data-section-id=\"1jcdcam\" data-start=\"2672\" data-end=\"2705\"\u003eAgricultural cleaning equipment\u003c\/li\u003e\n\u003cli data-section-id=\"1embcwq\" data-start=\"2706\" data-end=\"2739\"\u003eConstruction equipment cleaning\u003c\/li\u003e\n\u003cli data-section-id=\"noov52\" data-start=\"2740\" data-end=\"2785\"\u003eOEM equipment replacement and custom builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2787\" data-end=\"2917\"\u003eAlways verify shaft dimensions, mounting configuration, horsepower requirements, and pressure\/flow specifications before ordering.\u003c\/p\u003e\n\u003chr data-start=\"2919\" data-end=\"2922\"\u003e\n\u003ch1 data-section-id=\"1ebu7jn\" data-start=\"2924\" data-end=\"2962\"\u003eFunction of the Pressure Washer Pump\u003c\/h1\u003e\n\u003cp data-start=\"2964\" data-end=\"2989\"\u003eThe RKA4G40HN pump helps:\u003c\/p\u003e\n\u003cul data-start=\"2991\" data-end=\"3280\"\u003e\n\u003cli data-section-id=\"1f0pk6l\" data-start=\"2991\" data-end=\"3032\"\u003eDeliver up to \u003cstrong data-start=\"3007\" data-end=\"3018\"\u003e4.0 GPM\u003c\/strong\u003e of water flow\u003c\/li\u003e\n\u003cli data-section-id=\"z8nl78\" data-start=\"3033\" data-end=\"3083\"\u003eGenerate operating pressures up to \u003cstrong data-start=\"3070\" data-end=\"3083\"\u003e4,000 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"ob8uf6\" data-start=\"3084\" data-end=\"3139\"\u003eProvide reliable continuous-duty cleaning performance\u003c\/li\u003e\n\u003cli data-section-id=\"qz9eti\" data-start=\"3140\" data-end=\"3182\"\u003eOperate efficiently at lower pump speeds\u003c\/li\u003e\n\u003cli data-section-id=\"63inim\" data-start=\"3183\" data-end=\"3222\"\u003eReduce heat buildup and internal wear\u003c\/li\u003e\n\u003cli data-section-id=\"1rf54za\" data-start=\"3223\" data-end=\"3280\"\u003eExtend equipment service life in demanding applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3282\" data-end=\"3428\"\u003eIts low-speed triplex plunger design provides superior durability, smoother operation, and longer service life than high-speed direct-drive pumps.\u003c\/p\u003e\n\u003chr data-start=\"3430\" data-end=\"3433\"\u003e\n\u003ch1 data-section-id=\"mqxmo4\" data-start=\"3435\" data-end=\"3471\"\u003eCommon Signs Replacement Is Needed\u003c\/h1\u003e\n\u003cp data-start=\"3473\" data-end=\"3504\"\u003eReplace the pump if you notice:\u003c\/p\u003e\n\u003cul data-start=\"3506\" data-end=\"3729\"\u003e\n\u003cli data-section-id=\"zu24k4\" data-start=\"3506\" data-end=\"3534\"\u003eReduced operating pressure\u003c\/li\u003e\n\u003cli data-section-id=\"1f1izt\" data-start=\"3535\" data-end=\"3557\"\u003eDecreased water flow\u003c\/li\u003e\n\u003cli data-section-id=\"10eqapm\" data-start=\"3558\" data-end=\"3578\"\u003eWater or oil leaks\u003c\/li\u003e\n\u003cli data-section-id=\"rs3f56\" data-start=\"3579\" data-end=\"3606\"\u003eExcessive operating noise\u003c\/li\u003e\n\u003cli data-section-id=\"1g2txwa\" data-start=\"3607\" data-end=\"3640\"\u003eCracked or damaged pump housing\u003c\/li\u003e\n\u003cli data-section-id=\"16xn7rj\" data-start=\"3641\" data-end=\"3666\"\u003eExcessive internal wear\u003c\/li\u003e\n\u003cli data-section-id=\"1alt067\" data-start=\"3667\" data-end=\"3697\"\u003eLoss of cleaning performance\u003c\/li\u003e\n\u003cli data-section-id=\"1s772py\" data-start=\"3698\" data-end=\"3729\"\u003ePump failure during operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3731\" data-end=\"3826\"\u003eReplacing a worn pump restores pressure washer performance while minimizing equipment downtime.\u003c\/p\u003e\n\u003chr data-start=\"3828\" data-end=\"3831\"\u003e\n\u003ch1 data-section-id=\"1547z5u\" data-start=\"3833\" data-end=\"3863\"\u003eInstallation \u0026amp; Service Notes\u003c\/h1\u003e\n\u003cul data-start=\"3865\" data-end=\"4419\"\u003e\n\u003cli data-section-id=\"iv93qe\" data-start=\"3865\" data-end=\"3929\"\u003eShut down the pressure washer and relieve all system pressure.\u003c\/li\u003e\n\u003cli data-section-id=\"1me0y3q\" data-start=\"3930\" data-end=\"3980\"\u003eDisconnect the engine or motor before servicing.\u003c\/li\u003e\n\u003cli data-section-id=\"1wi9wqt\" data-start=\"3981\" data-end=\"4095\"\u003eVerify compatibility with the shaft size, mounting configuration, pulley alignment, and horsepower requirements.\u003c\/li\u003e\n\u003cli data-section-id=\"rdentd\" data-start=\"4096\" data-end=\"4162\"\u003eInstall the pump according to the manufacturer's specifications.\u003c\/li\u003e\n\u003cli data-section-id=\"n0r99j\" data-start=\"4163\" data-end=\"4243\"\u003eFill the crankcase with the recommended pump oil before operation if required.\u003c\/li\u003e\n\u003cli data-section-id=\"tt60ox\" data-start=\"4244\" data-end=\"4307\"\u003eConnect the water inlet and high-pressure discharge plumbing.\u003c\/li\u003e\n\u003cli data-section-id=\"z9jstr\" data-start=\"4308\" data-end=\"4351\"\u003ePrime the pump with water before startup.\u003c\/li\u003e\n\u003cli data-section-id=\"2i5ge8\" data-start=\"4352\" data-end=\"4419\"\u003eVerify proper operation and inspect for leaks after installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4421\" data-end=\"4607\"\u003e\u003cstrong data-start=\"4421\" data-end=\"4435\"\u003eImportant:\u003c\/strong\u003e Never operate the pump without an adequate water supply. Running the pump dry can quickly damage the plungers, seals, and valves, significantly reducing pump service life.\u003c\/p\u003e\n\u003chr data-start=\"4609\" data-end=\"4612\"\u003e\n\u003ch1 data-section-id=\"16tfrdt\" data-start=\"4614\" data-end=\"4643\"\u003eMaintenance Recommendations\u003c\/h1\u003e\n\u003cul data-start=\"4645\" data-end=\"5085\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"1vweevh\" data-start=\"4645\" data-end=\"4739\"\u003eCheck the pump oil level regularly and change the oil according to AR maintenance intervals.\u003c\/li\u003e\n\u003cli data-section-id=\"1hpvhte\" data-start=\"4740\" data-end=\"4811\"\u003eInspect packings, seals, valves, and fittings during routine service.\u003c\/li\u003e\n\u003cli data-section-id=\"102oikd\" data-start=\"4812\" data-end=\"4877\"\u003eMaintain clean, filtered inlet water to minimize internal wear.\u003c\/li\u003e\n\u003cli data-section-id=\"fwxuhd\" data-start=\"4878\" data-end=\"4948\"\u003eCheck belt alignment and tension periodically on belt-drive systems.\u003c\/li\u003e\n\u003cli data-section-id=\"11kk9ns\" data-start=\"4949\" data-end=\"5085\" data-is-last-node=\"\"\u003eUse only genuine OEM AR replacement parts and approved lubricants to maintain optimum performance, reliability, and long service life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"GeneralSprayers","offers":[{"title":"Default Title","offer_id":53443787293035,"sku":null,"price":599.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/9201\/5723\/files\/AnnoviReverberi-logo_8ce5d3a5-4031-4d03-98b5-1a7d39ab80a4.png?v=1782878444","url":"https:\/\/generalsprayers.com\/products\/ar-rka4g40hn-pressure-washer-pump-4-0-gpm-4000-psi-24mm-short-shaft-1-inlet","provider":"GeneralSprayers","version":"1.0","type":"link"}