{"product_id":"ef-07-090-telescopic-dump-trailer-kit","title":"Primary Mover EF-07-090 Telescopic Dump Trailer Kit – 90-Inch Stroke","description":"\u003ch2\u003eEF-07-090: 90-Inch Telescopic Dump Trailer Kit\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003ePrimary Mover EF-07-090\u003c\/strong\u003e is a \u003cstrong\u003ethree-stage, single-acting telescopic hoist\u003c\/strong\u003e with a \u003cstrong\u003e90-inch stroke\u003c\/strong\u003e, intended for suitable \u003cstrong\u003e8–12 ft dump trailer and truck bodies\u003c\/strong\u003e. Choose Hoist Only, the Standard 12V Kit or the Extreme Series 24V twin-motor package.\u003c\/p\u003e\n\n\u003cp\u003eThis is the shortest-stroke model in the current lineup and the remaining three-stage design. Its \u003cstrong\u003e20-ton model-family designation\u003c\/strong\u003e is an application category, not a guaranteed material payload. Final selection depends on the complete installation and the model-specific dump chart.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca style=\"color: #002dff; text-decoration: underline;\" href=\"\/pages\/help-me-choose-a-telescopic-hoist\"\u003eUse the telescopic hoist selector\u003c\/a\u003e with your moving body length, rear hinge overhang, material weight, moving body weight and desired dump angle. The recommendation is preliminary and requires confirmation against the current installation documentation.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications and Selection\u003c\/h3\u003e\n\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n  \u003ctable\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003cth scope=\"row\"\u003eModel\u003c\/th\u003e\n        \u003ctd\u003eEF-07-090\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth scope=\"row\"\u003eCylinder stroke\u003c\/th\u003e\n        \u003ctd\u003e90 inches\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth scope=\"row\"\u003eCylinder stages\u003c\/th\u003e\n        \u003ctd\u003eThree\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth scope=\"row\"\u003eHydraulic operation\u003c\/th\u003e\n        \u003ctd\u003eSingle-acting: power-up \/ gravity-down\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth scope=\"row\"\u003eIntended body-length range\u003c\/th\u003e\n        \u003ctd\u003e8–12 ft, subject to installation and chart verification\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth scope=\"row\"\u003eModel family\u003c\/th\u003e\n        \u003ctd\u003e20-ton application class; not a guaranteed payload rating\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth scope=\"row\"\u003ePower-package choices\u003c\/th\u003e\n        \u003ctd\u003eCustomer-supplied compatible hydraulics, Standard 12V or Extreme Series 24V twin motor\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth scope=\"row\"\u003eDump angle and lifting capability\u003c\/th\u003e\n        \u003ctd\u003eDepend on body length, hinge overhang, mounting geometry, load distribution and approved hydraulic pressure\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eChoose Your Kit\u003c\/h3\u003e\n\n\u003ch4\u003eEF-07-090-H — Hoist Only\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e90-inch-stroke, three-stage telescopic cylinder\u003c\/li\u003e\n  \u003cli\u003eH-frame lower mounting bracket\u003c\/li\u003e\n  \u003cli\u003eTwo upper mounting brackets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor a build using a compatible customer-supplied hydraulic system. A power unit, hydraulic hoses, fittings and the other components supplied with the powered kits are not included in this option.\u003c\/p\u003e\n\n\u003ch4\u003eEF-07-090-SK — Standard 12V Kit\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAll Hoist Only components\u003c\/li\u003e\n  \u003cli\u003ePrimary Mover 12V single-motor, single-acting hydraulic power unit with SAE #8 connection\u003c\/li\u003e\n  \u003cli\u003eHydraulic hose assembly and fittings\u003c\/li\u003e\n  \u003cli\u003eBridon load-control valve\u003c\/li\u003e\n  \u003cli\u003eSafety arm and cup\u003c\/li\u003e\n  \u003cli\u003eHeavy-duty hinges\u003c\/li\u003e\n  \u003cli\u003eBattery cables\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe matched hydraulic package combines powered lifting with gravity lowering. Its SAE #8 connection and internal return-flow design address restrictions in the oil's path back to the reservoir.\u003c\/p\u003e\n\n\u003ch4\u003eEF-07-090-SK-U — Extreme Series 24V Twin-Motor Kit\u003c\/h4\u003e\n\n\u003cp\u003eIncludes the Standard Kit's mechanical and hydraulic installation components, with a \u003cstrong\u003e24V twin-motor, single-acting power unit replacing the Standard Kit's 12V unit\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe twin-motor package provides increased lifting flow for users who prioritize cycle speed. It requires a properly configured 24V battery and charging system. Additional flow does not increase the cylinder's approved pressure, the kit's charted capacity or the trailer's weight ratings.\u003c\/p\u003e\n\n\u003cp\u003eRead \u003ca style=\"color: #002dff; text-decoration: underline;\" href=\"\/pages\/when-should-you-upgrade-to-a-24v-twin-motor-hydraulic-power-unit\"\u003ewhen to upgrade to a 24V twin-motor hydraulic power unit\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eCapacity, Load Position and Dump Angle\u003c\/h3\u003e\n\n\u003cp\u003eThe hoist lifts the material \u003cstrong\u003eplus the complete moving body\u003c\/strong\u003e, including its tailgate, liner and attached equipment. Use the model-specific chart for the actual installation; do not treat the 20-ton category as an allowance for 20 tons of material.\u003c\/p\u003e\n\n\u003cp\u003eSpread material evenly along and across the body, following the vehicle manufacturer's loading requirements. A heavy pile near the front increases its leverage about the rear hinge and can make the initial lift more demanding. Do not shift material behind the hinge to try to increase dumping capability.\u003c\/p\u003e\n\n\u003cp\u003eStay within the trailer's GVWR, each axle's GAWR, tire and wheel ratings, hitch limits and the tow vehicle's applicable ratings. A hoist upgrade does not increase the trailer's permitted payload.\u003c\/p\u003e\n\n\u003cp\u003eStroke and mounting geometry determine the achievable dump angle. Read \u003ca style=\"color: #002dff; text-decoration: underline;\" href=\"\/pages\/can-a-20-ton-or-30-ton-telescopic-hoist-really-lift-that-much\"\u003ewhat 20-ton and 30-ton telescopic hoist labels actually mean\u003c\/a\u003e before selecting your kit.\u003c\/p\u003e\n\n\u003ch3\u003eThree-Stage or Four-Stage?\u003c\/h3\u003e\n\n\u003cp\u003eThe EF-07-090 remains a three-stage cylinder. Primary Mover's longer-stroke current models use four-stage designs for a more compact retracted package. Stage count alone does not determine lifting capacity, operating speed or dump angle.\u003c\/p\u003e\n\n\u003cp\u003eSee \u003ca style=\"color: #002dff; text-decoration: underline;\" href=\"\/pages\/three-stage-vs-four-stage-telescopic-dump-cylinders\"\u003ethree-stage vs. four-stage telescopic cylinders\u003c\/a\u003e for the design comparison and retracted-length examples.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation and Operating Requirements\u003c\/h3\u003e\n\n\u003cp\u003eInstallation requires qualified assessment of the trailer structure, welding, mounting alignment and reinforcement. Confirm the upper bracket support and gusset requirements in the current instructions. Match hydraulic pressure, flow, reservoir capacity and load-control components to this exact model.\u003c\/p\u003e\n\n\u003cp\u003eDump on firm, level ground with personnel clear. Follow the safety arm's stated limitations. Before anyone works beneath a raised body, use the independent supports or restraints required by the installation instructions; do not rely on hydraulic pressure or the supplied safety arm alone.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca style=\"color: #002dff; text-decoration: underline;\" href=\"\/pages\/documents\"\u003eFind installation manuals and product documentation\u003c\/a\u003e. The correct model-specific instructions and dump chart govern final selection and installation.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n  \u003csummary style=\"cursor: pointer; padding: 10px 0;\"\u003e\n    \u003cstrong\u003eCan the EF-07-090 really dump 20 tons?\u003c\/strong\u003e\n  \u003c\/summary\u003e\n  \u003cp\u003eThe 20-ton label identifies its model family, not a guaranteed payload for an 8–12 ft trailer. Actual capability comes from the installation-specific chart, including body weight, load distribution, geometry and approved operating pressure. The trailer and vehicle ratings may permit substantially less material.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n  \u003csummary style=\"cursor: pointer; padding: 10px 0;\"\u003e\n    \u003cstrong\u003eWill this kit fit every 8–12 ft dump body?\u003c\/strong\u003e\n  \u003c\/summary\u003e\n  \u003cp\u003eNo. Body length is a starting point. Verify mounting space, cylinder alignment, rear hinge overhang, structural support, gross lifted weight and desired dump angle. Use the \u003ca style=\"color: #002dff; text-decoration: underline;\" href=\"\/pages\/help-me-choose-a-telescopic-hoist\"\u003etelescopic selector\u003c\/a\u003e for preliminary guidance.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n  \u003csummary style=\"cursor: pointer; padding: 10px 0;\"\u003e\n    \u003cstrong\u003eWhat dump angle will I get from the 90-inch stroke?\u003c\/strong\u003e\n  \u003c\/summary\u003e\n  \u003cp\u003eThere is no single angle for every installation. The same stroke produces different angles as body length, cylinder mounting points and hinge position change. Check the model-specific dump-angle chart before purchasing or welding mounts.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n  \u003csummary style=\"cursor: pointer; padding: 10px 0;\"\u003e\n    \u003cstrong\u003eCan I use my existing pump with the Hoist Only option?\u003c\/strong\u003e\n  \u003c\/summary\u003e\n  \u003cp\u003eYes, if the entire hydraulic system is compatible with this cylinder and its operating limits. Confirm pressure, delivered flow, oil volume, return-flow path and load-control components. Too little pressure reduces available force; insufficient flow can make lifting slow.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n  \u003csummary style=\"cursor: pointer; padding: 10px 0;\"\u003e\n    \u003cstrong\u003eDoes the Extreme Series kit lift more weight than the Standard Kit?\u003c\/strong\u003e\n  \u003c\/summary\u003e\n  \u003cp\u003eWhen both operate at the same approved pressure, the twin-motor upgrade is for more lifting flow and shorter cycle time. It does not increase the model's charted capacity, dump angle, structural limits or vehicle ratings.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n  \u003csummary style=\"cursor: pointer; padding: 10px 0;\"\u003e\n    \u003cstrong\u003eDoes the twin-motor power unit also power the bed down?\u003c\/strong\u003e\n  \u003c\/summary\u003e\n  \u003cp\u003eNo. This is a single-acting system: power-up and gravity-down. Lowering depends on the body's return force and the hydraulic return circuit, including hoses, fittings, valves and flow control. The second motor does not directly accelerate gravity lowering.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n  \u003csummary style=\"cursor: pointer; padding: 10px 0;\"\u003e\n    \u003cstrong\u003eWhat battery system does the SK-U package need?\u003c\/strong\u003e\n  \u003c\/summary\u003e\n  \u003cp\u003eThe Extreme Series power unit requires 24V DC. A common arrangement uses two matched 12V batteries connected in series, with compatible 24V charging. Follow the supplied wiring instructions and battery requirements; a standard 12V charging feed cannot directly charge the complete 24V bank.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n  \u003csummary style=\"cursor: pointer; padding: 10px 0;\"\u003e\n    \u003cstrong\u003eCan I work under the bed with just the supplied safety arm?\u003c\/strong\u003e\n  \u003c\/summary\u003e\n  \u003cp\u003eDo not rely on the supplied safety arm alone for service beneath a raised body. Follow its stated limitations and use the independent supports or restraints required by the current installation instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch3\u003eShipping and Application Support\u003c\/h3\u003e\n\n\u003cp\u003eKits ship on a pallet via freight. Shipping is included for qualifying commercial delivery locations with a dock or forklift. Residential, rural, farm or special delivery services may involve additional charges; confirm delivery arrangements before ordering.\u003c\/p\u003e\n\n\u003cp\u003eNeed help choosing a package? Call \u003ca style=\"color: #002dff; text-decoration: underline;\" href=\"tel:9858886554\"\u003e985-888-6554\u003c\/a\u003e or \u003ca style=\"color: #002dff; text-decoration: underline;\" href=\"\/collections\/telescopic-cylinder-kits\"\u003ecompare all telescopic dump bed kits\u003c\/a\u003e.\u003c\/p\u003e","brand":"Primary Mover","offers":[{"title":"Hoist Only","offer_id":42804203749558,"sku":"EF-07-090-H","price":1199.0,"currency_code":"USD","in_stock":true},{"title":"Standard Kit","offer_id":42804070645942,"sku":"EF-07-090-SK","price":1949.0,"currency_code":"USD","in_stock":true},{"title":"Extreme Series","offer_id":44063694258358,"sku":"EF-07-090-SK-U","price":2399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1169\/7506\/files\/1_33b9ab5a-10fa-4863-9043-560510aea80a.jpg?v=1781650918","url":"https:\/\/www.primarymover.com\/products\/ef-07-090-telescopic-dump-trailer-kit","provider":"Primary Mover","version":"1.0","type":"link"}