{"product_id":"hpu-da004-ram®-hydraulic-power-unit-4-quart-double-acting-12v","title":"HPU-DA004 | RAM® Hydraulic Power Unit 4 Quart Double Acting 12V","description":"\u003cp\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e Hydraulic Power Unit 4 Quart Double Acting 12V\u003cbr\u003e\u003cstrong\u003eCondition:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eNew\u003cbr\u003e\u003cstrong\u003eBrand:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eRAM® \u003cbr\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e HPU-DA004\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDump Trailers \u0026amp; Trucks:\u003c\/b\u003e Utility dump trailers, small-to-medium dump beds, and flatbed dump conversions (BTI, Big Tex, PJ Trailers, Load Trail, Midsota, etc.).\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eHydraulic Lifts \u0026amp; Hoists:\u003c\/b\u003e Vehicle tailgates\/liftgates, car haulers, hydraulic tilt trailers, and boat lifts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSnow \u0026amp; Ice Control Equipment:\u003c\/b\u003e Snowplow angle\/lift hydraulics and spreader systems (Boss, Western, Meyer, Fisher).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eIndustrial \u0026amp; Agricultural Machinery:\u003c\/b\u003e Scissor lifts, hydraulic presses, log splitters, farm implements, and hydraulic levelling jacks.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eHydraulic Power Unit 4 Quart Double Acting 12V\u003c\/strong\u003e is an all-in-one electro-hydraulic pump system designed to generate hydraulic pressure for double-acting hydraulic cylinders.\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e\u003cb\u003e1. What is it?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003ePart is a self-contained 12V DC power pack that combines a high-torque electric motor, gear pump, dual-solenoid directional control valve, relief valves, and a 4-quart fluid reservoir. It supplies pressurized hydraulic fluid to extend AND retract a cylinder under power, rather than relying on gravity to lower the load.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e2. Core Functions \u0026amp; Features\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003ePower Up \/ Power Down Operation:\u003c\/b\u003e Uses a 2-button hand-held remote to power the hydraulic cylinder in both directions (extending and retracting), ensuring smooth and controlled movement regardless of load weight.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eIntegrated Solenoid Valves:\u003c\/b\u003e Dual 12V solenoids change fluid direction instantly based on operator input from the remote control.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eInternal Pressure Relief Valves:\u003c\/b\u003e Built-in factory-set relief valves protect the hydraulic system and hoses from over-pressurization during heavy lift cycles.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCompact Self-Contained Design:\u003c\/b\u003e Mounts directly to trailers, equipment frames, or truck beds with simple battery cable connections and hydraulic hose hookups.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSigns of Faulty\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e\u003cb\u003e1. Motor Clicks But Won't Run (Low Voltage or Bad Solenoid)\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e Pressing the remote button produces a loud clicking sound from the starter relay\/solenoid, but the electric motor fails to spin.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Low battery voltage (\u0026lt;12V), loose or corroded battery cables, a bad start solenoid, or a seized motor armature.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e2. Motor Runs, But Pump Fails to Lift the Load\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e The 12V motor whirs loudly when you press \"Power Up,\" but the dump bed, lift, or trailer will not rise, or it stalls immediately under weight.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Low hydraulic fluid level in the 4-quart reservoir, a stuck-open pressure relief valve, a worn gear pump, or internal hydraulic fluid bypass inside the cylinder.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e3. Cylinder Refuses to Power Down (Retract)\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e The cylinder extends fine, but when you press \"Power Down,\" nothing happens or it fails to retract under power.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e A faulty lower solenoid valve, burnt-out lowering coil, stuck directional spool, or a disconnected wiring connection in the remote switch.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e4. Sluggish, Jerky, or Foamy Hydraulic Movement\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e The mechanism stutters, moves slowly, or the fluid in the clear reservoir looks milky, bubbly, or aerated.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Air trapped in the hydraulic lines\/pump (cavitation), contaminated or incorrect hydraulic oil (moisture\/water mixing with oil), or a blocked suction filter screen.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e5. Continuous Fluid Leaks Around the Unit\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e Pools of hydraulic oil forming under the power unit housing, cracked poly reservoir tank, or weeping fittings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Overtightened or loose SAE fittings, cracked reservoir body from impact or freezing, or worn shaft seals on the hydraulic pump face.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003cbr\u003eFirst Truck Parts offers a \u003cstrong\u003e365-days warranty\u003c\/strong\u003e for all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website. \u003c\/span\u003e\u003c\/p\u003e","brand":"RAM®","offers":[{"title":"Default Title","offer_id":49192701264116,"sku":"HPU-DA004","price":970.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/1479\/5764\/files\/photo_2026-08-17_19-08-09.jpg?v=1786989677","url":"https:\/\/firsttruckparts.com\/products\/hpu-da004-ram%c2%ae-hydraulic-power-unit-4-quart-double-acting-12v","provider":"First Truck Parts","version":"1.0","type":"link"}