EP-900W 24V Tarpaulin Motor for Dump Truck With Reducer
The EP-900W tarpaulin motor with reducer is a purpose-built, gear-integrated DC drive unit designed for heavy-duty dump truck tarpaulin cover systems. Carrying model designation XL09KW With Reducer, this assembly combines a 900W permanent magnet DC motor with an inline worm-type gearbox reducer in a single compact housing — eliminating the need for a separately mounted gearbox, reducing installation complexity, and delivering higher usable torque directly at the tarp drive shaft.
Rated at 24V with a 45A continuous current draw, the motor section develops 4 N·m of torque before gear reduction. After passing through the integrated reducer stage, the output torque available at the drive shaft climbs substantially, making this one of the most capable heavy duty tarpaulin motor configurations available for demanding dump truck applications. The motor operates on a S2 3min–30%ED duty cycle — precisely matched to the short-burst actuation pattern of tarp cover open/close cycles — and the complete assembly carries an IP67 ingress protection rating, meaning it is fully sealed against water jets and fine dust intrusion.
Integrated Gear-Reduced DC Drive
EP-900W 24V Tarpaulin Motor for Dump Truck With Reducer
Model XL09KW With Reducer — a compact, all-in-one tarp gear motor unit engineered for reliable, high-torque tarpaulin actuation on commercial dump trucks and tipper vehicles.
Technical Specifications — Model XL09KW Tarpaulin Motor With Reducer
All parameters are measured at rated conditions per Class F insulation standards. Dimensional data is extracted from the motor outline drawing provided for the XL09KW Tarpaulin Motor series.
| Tarpaulin Motor Parameter | Value | Notes |
|---|---|---|
| Motor Model | XL09KW With Reducer | Tarpaulin Motor + Integrated Reducer |
| Rated Voltage | 24 V DC | Optional: 12V configuration |
| Rated Power | 900 W | Motor input power |
| Rated Current | 45 A | At full rated load |
| Rated Torque (Motor) | 4 N·m | Before gear reduction |
| Duty Cycle | S2 3min – 30% ED | Short-time intermittent duty |
| Insulation Class | Class F | Max winding temp 155°C |
| Protection Rating | IP67 | Fully waterproof & dustproof |
| Number of Teeth | 1 | Drive gear configuration |
| Rotation Direction | CW (Clockwise) | Standard; reversible via wiring |
| Scope of Application | Dump Truck | Tarpaulin cover drive systems |
| Motor Body Diameter | Ø133 mm | Motor section outer diameter |
| Overall Length | 178.5 mm | Motor + reducer combined length |
| Reducer Housing Width | 120 mm | Output flange side width |
| Output Shaft Diameter | Ø25 mm | Reducer output shaft (h7 tolerance) |
| Reducer Flange OD | Ø85 mm | Output flange face diameter |
| Motor Input Shaft (Internal) | Ø8.5 mm | Motor-to-reducer coupling shaft |
| Mounting Bolt | M8 | Standard flange mounting pattern |
How the Tarpaulin Motor with Reducer Works
The XL09KW operates on the permanent magnet DC motor working principle, where direct current fed through terminals A1 and A2 energises the wound armature, generating a rotating electromagnetic field that interacts with the fixed stator magnets to produce shaft torque. What distinguishes this unit from a bare motor is the addition of an integrated worm-type reducer bolted coaxially to the motor output. This stage multiplies the torque produced by the motor while proportionally reducing the output shaft speed — the core mechanical trade-off that makes the assembly suitable for direct tarp drive without a separate gearbox.
In practical terms: the motor spins at thousands of RPM and delivers 4 N·m at its shaft. The reducer steps the speed down and converts that kinetic energy into substantially higher torque at the final output shaft. For tarp operators, this means the tarpaulin cover receives a steadier, more forceful pull from the very start of each actuation stroke, with far less sensitivity to load variations from cover weight, debris accumulation, or partial mechanical resistance along the tarp rail system.
Directional control is achieved the same way as any dc motor drive — by reversing polarity at A1 and A2 from the cab switch, the output shaft reverses, rolling the cover in or out on command. The wiring diagram shows a simple two-terminal connection from the motor controller, and the IP67-sealed terminal block prevents water ingress at the connection point — a detail that matters significantly on dump truck platforms where the motor may be exposed to direct hose-down during vehicle washing. The S2 3min–30%ED duty cycle rating reflects the real intermittent-burst usage profile of tarp systems, keeping winding temperatures well within Class F limits throughout a full working day.
Five Reasons to Choose This Tarp Gear Motor
① Integrated Reducer — One Unit, Less Complexity
By combining the DC motor and worm gearbox in a single bolted assembly, this tarp gear motor eliminates the coupling, alignment bracket, and separate gearbox housing that add cost and failure points to conventional two-piece setups. Installation is faster, the footprint is smaller, and there are fewer joints that could loosen under vibration over a truck's service life.
② IP67 Full Weatherproof Protection
The sealed housing protects both the motor windings and the reducer gear set from water, mud, and fine dust — the exact environmental mix that dump truck equipment encounters daily on quarry roads, demolition sites, and wet-weather construction routes. For fleet operators in high-rainfall regions such as Queensland, British Columbia, or the Netherlands, IP67 is a non-negotiable baseline for any electric tarp motor for dump truck fitment.
③ Boosted Output Torque via Gear Reduction
The motor's 4 N·m input torque is multiplied through the worm reducer stage, delivering substantially higher force at the Ø25 mm output shaft than a non-reduced motor of the same power rating could provide. This makes the unit particularly effective as a heavy duty tarpaulin motor for dump truck loads that are wider, heavier, or operate in conditions where cover tension is higher than normal — side-roll covers on large-body tipper trucks being a common example.
④ 12V Option for Broad Vehicle Compatibility
Unlike the bare motor version which offers multiple voltage options up to 72V, the with-reducer variant is optimised for 24V standard and 12V optional configurations — targeting the two voltage systems found on the vast majority of conventional diesel dump trucks worldwide. This focused compatibility simplifies procurement for fleet maintenance teams sourcing a universal tarp motor for dump truck across mixed vehicle age groups.
⑤ Self-Locking Worm Gear — Tarp Stays in Position
A meaningful secondary benefit of worm-type gearing is inherent self-locking: when the motor is de-energised, the gear set prevents backdrive from the tarp cover load. The cover stays exactly where it was positioned — open, closed, or partially extended — without requiring a separate mechanical brake or hold circuit. This is a practical advantage for operators who park mid-cycle or need the tarp to remain stable during loading operations with elevated sides.
Materials & Manufacturing Standards
The motor section of the XL09KW uses the same core material set as the bare-motor variant. The stator housing is precision die-cast from high-strength aluminium alloy — chosen for its combination of corrosion resistance, thermal conductivity, and dimensional stability across temperature cycling. Silicon steel cold-rolled laminations form the stator core, minimising eddy-current losses and ensuring consistent magnetic circuit performance over the motor's service life.
The armature winding uses high-purity enamelled copper wire rated for Class F continuous temperature, wound with precision CNC coil-winding equipment to maintain balanced resistance between poles. The permanent magnets are sintered neodymium-iron-boron (NdFeB) grade, providing the high flux density that allows this motor to generate 4 N·m in a compact 133 mm diameter frame. NdFeB maintains its magnetic properties reliably through tens of thousands of thermal and electrical cycles — a critical factor for motors subject to frequent starts and stops across a dump truck's daily route.
The integrated reducer housing is cast from ductile iron, which provides significantly higher impact resistance than standard grey cast iron — important for a component mounted on a truck frame that transmits road vibration and occasional shock loads from rough terrain. The worm gear pair itself uses a hardened steel worm shaft meshing with a phosphor bronze worm wheel, a material combination chosen specifically for its low friction coefficient, self-lubricating properties, and resistance to wear under boundary lubrication conditions. The gear cavity is sealed and factory-filled with extreme-pressure (EP) gear lubricant for the motor's rated service life under normal operating conditions.
All tarpaulin motor parts pass through a final inspection process covering insulation resistance testing, no-load run-in, waterproof integrity at IP67 specification, and dimensional verification before shipment. The production facility operates under ISO 9001:2015 certification, with documented material traceability and process control records maintained for each batch. This is the standard of build quality that fleet operators sourcing heavy duty tarp motor for dump truck replacement parts need to rely on for consistent field performance.
Where This Tarpaulin Motor Gets Used
The XL09KW with reducer suits any mobile tarpaulin system where the drive mechanism benefits from an integrated, torque-multiplied motor unit. Below are the main operating environments where this tarpaulin motor configuration delivers clear advantages over bare-motor alternatives:
Side-Roll Tarp Systems on Large Dump Trucks
Wide-body dump trucks carrying aggregates, sand, or demolition rubble require side-roll tarp covers that span considerable distances and carry their own structural weight. The gear-reduced output of the XL09KW provides the sustained torque these larger covers need without motor stalling or current overrun — a common failure mode of undersized dump truck tarp motor installations.
Tipper Trailers & Dump Trailer Configurations
The compact combined profile of the XL09KW is well-suited for mounting in the tighter bodywork spaces typical of tipper semi-trailer tarp systems. As a dump trailer tarp motor, it handles the combination of tarp cover tension, highway wind loading, and repeated daily cycling across multi-drop delivery routes without maintenance intervention between service intervals.
Grain & Agricultural Bulk Trailers
Large grain trailers require tarp covers that protect bulk loads from moisture during transit between field and storage. The self-locking characteristic of the worm gear reducer keeps the cover securely positioned during loading and unloading, without requiring the operator to actively hold or latch the cover open — a practical convenience in field conditions where both hands are often occupied.
Covered Refuse & Recycling Collection Vehicles
Municipal collection vehicles operating on dense urban routes need a tarpaulin motor kit that cycles reliably dozens of times per shift without heat-related degradation. The S2 30%ED duty cycle gives operators a clear operational parameter — each cover cycle stays well within the motor's thermal rating when used according to specification, giving fleet managers a predictable maintenance planning baseline.
Mining & Quarry Haul Trucks — Compliant Load Covering
Environmental and road safety regulations across Australia, the UK, South Korea, and other markets mandate covered loads for unsealed aggregate and ore transport. The XL09KW's IP67 housing keeps quarry dust out of the motor and reducer internals — significantly extending service intervals compared to open-frame motor alternatives in this particularly abrasive environment.
Motor Performance Characteristics
The motor performance curve for the XL09KW plots the relationship between speed (RPM), current (A), torque (N·m), voltage (V), and efficiency (%) across the operating range. The dc motor high speed no-load point sits at approximately 5000–6000 RPM drawing around 5A. As torque demand increases toward the 4 N·m rated point, the current rises linearly to 45A while speed drops to approximately 3000–3300 RPM. The gear reducer then converts this operating point into higher output shaft torque at proportionally lower RPM — the combination that makes the unit effective for tarp cover applications.
Peak efficiency of the motor section occurs in the mid-torque range and exceeds 80%, which is significant for dump truck electrical systems where sustained high current draw affects alternator load and battery state. Operators working in high-cycle environments — such as ready-mix concrete delivery or multi-stop municipal routes — benefit from the reduced electrical load per cycle compared to less efficient dc electric motors of similar power ratings.
| Operating Point | Speed (RPM) | Current (A) | Torque (N·m) | Efficiency (%) |
|---|---|---|---|---|
| No Load | ~5500 | ~5 | 0 | — |
| 25% Load | ~4700 | ~16 | 1.0 | ~78 |
| 50% Load | ~4100 | ~27 | 2.0 | ~85 |
| Rated Load (100%) | ~3200 | 45 | 4.0 | ~82 |
About Our Manufacturing Facility
With over ten years of hands-on production experience in mechanical power transmission, our facility designs and manufactures a broad range of drive components for industrial and agricultural applications. Our product line spans agricultural gearboxes, worm gear reducers, planetary gear drives, PTO drive shafts, hydraulic cylinders, transmission gears, roller chains, and DC electric motors — giving us first-hand engineering familiarity with the entire drivetrain context in which products like the XL09KW operate.
We are ISO 9001:2015 certified and operate dedicated production lines for motor winding, gear cutting, heat treatment, CNC turning and milling, and final assembly and testing. Custom gearbox and assembly production is available in ductile iron, cast iron, cast steel, precision investment cast steel, and cast aluminium — covering standard catalogue parts as well as non-standard dimensions and configurations developed in collaboration with OEM customers. Our engineering team provides documentation in English for international clients, including dimensional drawings, performance data sheets, and material certification.
Workshop
Complete Drive System — Related Products
Beyond the tarpaulin motor itself, we manufacture the full range of components that work alongside it in a complete tarp drive system. Sourcing motor and gearbox from a single production facility means matched interfaces, consistent quality documentation, and simplified after-sales support — a genuine one-stop supply advantage for integrators and fleet procurement teams.
المحركات الكهربائية
Our full line of dc electric motors covers everything from compact small dc motor units to high-power high torque dc motor configurations, including brushless dc motor and bldc motor variants for applications requiring longer brush-free service intervals. All share compatible mounting standards with the XL09KW series for easy system integration.
علبة تروس دودة
For applications where a standalone reducer is preferred — or where a different motor-gearbox ratio is required for a specific tarp cover size or weight — our separate worm gearbox range provides a wide selection of reduction ratios, input flanges, and output shaft configurations compatible with the EP-900W motor family. Ideal for custom tarpaulin drive builds.
الأسئلة الشائعة
What makes a tarpaulin motor with reducer better than a standalone motor for heavy duty dump truck applications in the UK construction industry?
An integrated reducer delivers significantly higher output torque at the drive shaft than a bare motor of the same power rating. For UK construction dump trucks — where tarp covers are often wider and heavier than agricultural equivalents — this torque multiplication is the difference between a motor that stalls under load and one that completes every cover cycle consistently.
How do I select the right tarp gear motor voltage for my dump truck's existing electrical system when operating across mixed fleet vehicles in Australia?
Most conventional diesel dump trucks in Australia run either 12V (light commercial) or 24V (heavy commercial) electrical systems. The XL09KW with reducer is available in both configurations from the factory. To confirm which you need, check the battery bank configuration: two 12V batteries in series gives 24V, which is the most common setup for heavy tipper trucks.
Where can I find a reliable replacement tarpaulin motor with integrated reducer for a tipper trailer operating on construction routes in the Netherlands?
The XL09KW series is manufactured to IP67 and Class F insulation standards, with export documentation suitable for CE-environment markets including the Netherlands. Our logistics team ships to Rotterdam and other Dutch ports with full commercial documentation. Lead times for standard stock units are typically short. For fleet quantities, forward order agreements with scheduled delivery batches can be arranged — a practical option for fleet managers who need to hold a minimum inventory of tarpaulin motor replacement units without keeping excessive stock on-site.
When should a dump truck operator in Canada consider upgrading to a heavy duty tarpaulin motor with reducer instead of replacing the existing standard motor again?
If your current motor is burning out brushes, tripping thermal protection, or stalling on cold starts — particularly in Canadian winters where cover fabric stiffens significantly — these are signs the existing unit is undersized for the actual operating demand. An upgrade to the XL09KW with reducer addresses all three root causes: the reducer provides additional torque for cold-start and high-resistance conditions, the Class F insulation handles higher winding temperatures before thermal cutout, and the IP67 sealed housing prevents moisture ingress into the commutator during freeze-thaw cycling.
Which type of DC motor is used in a tarpaulin motor for dump truck systems and how does it differ from a brushless DC motor in that application?
The XL09KW uses a permanent magnet brushed DC motor. This design is well-matched to dump truck tarp applications because brushed DC motors deliver high starting torque immediately, are straightforward to control with a simple polarity-reversing switch, and are easily serviced in the field when brush replacement eventually becomes necessary. A brushless dc motor or bldc motor offers longer service intervals between maintenance actions, but requires an electronic controller, adds cost, and is less forgiving of the voltage transients common in truck electrical systems. For most commercial dump truck tarp systems, the brushed permanent magnet design remains the practical choice.
المحرر: PXY
