Mechanical Suspension Dump Semi Trailer
The Mechanical Suspension Dump Semi Trailer (also known as a Mechanical Leaf Spring Tipper Semi Trailer, Heavy-Duty Steel Spring Dump Trailer, Mechanical Suspension Self-Unloading Trailer, or Standard Spring Tipper) is the most rugged, durable, and cost-effective bulk transport trailer solution engineered specifically for severe off-road environments, unpaved mining access roads, construction sites, and demanding cross-border logistics. Equipped with a heavy-duty multi-leaf mechanical suspension system (featuring reinforced tandem/tridem rocker equalizer arms, heavy-duty torque rods, and thick high-tensile spring steel leaves), this trailer delivers exceptional load-bearing resilience, superior axle equalization, and minimal maintenance requirements under heavy payload conditions. Built on an ultra-reinforced high-tensile Q345B/Q550/T700 structural steel main chassis welded via automated submerged-arc processes, it features an 8mm high-tensile steel floor deck and 6mm side wall cargo body (or optional HARDOX wear plate) backed by a dense crossmember matrix. Powered by a front-mounted multi-stage HYVA telescopic hydraulic hoist system, it provides high tipping leverage, a steep 55° discharge angle, and rapid unloading cycles. Outfitted with 3 or 4 commercial heavy-duty axles (13T/16T FUWA, BPW, STEYR, or AQ axles), an automatic top-hinged tailgate with mechanical/pneumatic safety locks, and a dual-line pneumatic air braking system with WABCO emergency relay valves, this mechanical suspension tipper trailer ensures long service life, low operational maintenance costs, and maximum fleet return on investment in harsh operating environments. Fully certified under ISO9001, CCC, CE, and SGS standards.
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Product Details
Technical Specifications
Model NO. : Customized / Mechanical Suspension Dump Spec
Type : Semi-Trailer / Mechanical Suspension Dump Semi Trailer (Leaf Spring Tipper)
Load Capacity : 40 - 70 Tons (Heavy Duty Payload Rating)
Volumetric Capacity : Approx. 28 - 45 CBM (Customizable Volume Design)
Condition : New
Grade : Heavy Duty / Mining, Quarry, Civil Construction & Off-Road Logistics Grade
Shape : Heavy Rectangular or U-Shape Cargo Box / Front Hoist End Dump
Origin : Shandong, China
Production Capacity : Customized
Certifications : ECE / ISO9001 / CCC / CE / SGS
HS Code : 8716399000
Overall Dimensions : Customized (Approx. 9500-11800 x 2500-2550 x 3100-3600 mm)
Cargo Box Inside Dimensions : Customized (Approx. 9000-11200 x 2300-2400 x 1400-1800 mm)
Tare Weight : Approx. 8000 kg - 9500 kg
King Pin Setting : 1220 mm
Steel Sheet Thickness : Floor Thickness 8mm - 10mm, Side Wall Thickness 6mm - 8mm (High-Tensile Steel Q345B / Q550 / T700 or NM400 / HARDOX 450 Wear Plate)
Hydraulic Jack : Full set of HYVA hydraulic system, front setting multi-stage telescopic cylinder
Tailgate : One-piece tailgate with upper articulation, automatic mechanical/pneumatic safety lock system with rubber sealing gaskets
Wheel Base : 4800mm + 1310mm + 1310mm / Customized
Tread : 1840 mm
Axle Number : 3 Axles (Optional 4 Axles)
Axle Brand : AQ, FUWA, BPW or STEYR axle
Axle Capacity : 13 Ton / 16 Ton per axle
Rims & Tires : Rim 8.0-20, 8.5-20, or 9.00-22.5; Tire 11.00-20, 12.00-20, or 12R22.5
Tire Number : 12 pcs + 1 Spare Tire
Tire Brand : Triangle / Double Coin / Linglong
Suspension : Heavy Duty Mechanical Suspension with 10/11/12-pcs Leaf Spring and Equalizer Rocker Arms
Leaf Spring : 10-pcs, 11-pcs, or 12-pcs heavy-duty reinforced spring packs (13mm/16mm thick leaves)
Brake System : Dual lines pneumatic brake system, WABCO Emergency Relay Valve; T30/30+T30 air chamber; parking brake
ABS Brand : WABCO / Kemi
Self-dumping : Front-Hoist Hydraulic Self-dumping (Rear End Tipping)
Main Beam : I shape, Mild Alloy (16Mn / Q345B / Q550 / T700) by Automatic submerged arc welding
Cross Beam : Mild Alloy Q235 High-Density Crossmember Matrix
King Pin : Welded / Bolted kingpin, size 50# (2") or 90# (3.5")
Landing Gear : Double sides operation, Static capacity 30 Ton (JOST / FUWA)
Spare Tire Carrier : 1 or 2 Units Heavy-Duty Winch Carriers
Tool Box : 1 Unit Heavy-Duty Lockable Steel Box
Lights & Reflectors : Rear light, rear reflector, turn indicative light, side reflector, fog lamp, number plate light
Wiring : 24V, 6 lines / 7 lines ISO Standard Wiring Harness
Air/Elec. Connector : ISO standard air connector, 24V 7 pin plug socket
Paint : Sand blasting before painting, color upon request (Sa 2.5 + Epoxy Zinc Primer + Polyurethane Topcoat)
Warranty : Main Beam Frame 3 Years / Axles & Major Parts 1 Year
Package : Nude Packing / Bulk Vessel / Ro-Ro / SKD Packaging
Delivery Time : 20 - 25 Working Days
Payment Terms : T/T, L/C
Key Structural & Performance Features
1. High-Strength Multi-Leaf Mechanical Suspension System
- Heavy-Duty Leaf Spring Packs: Utilizes thick, high-tensile spring steel leaves (10-leaf, 11-leaf, or 12-leaf configurations) designed specifically to handle extreme vertical loads and torsional articulation on harsh off-road haul routes.
- Equalizer Rocker Arm Architecture: Reinforced center equalizer rockers distribute dynamic axle weights evenly across all wheels, preventing individual axle overloading when traversing deep ruts or uneven terrain.
- Low Maintenance & High Field Repairability: Heavy mechanical design eliminates complex air lines or electronic sensors, making it exceptionally reliable and easily serviceable in remote mining or construction locations.
2. Front HYVA Hydraulic Hoist & Submerged-Arc Chassis
- Front-Mounted HYVA Hydraulic Package: Outfitted with a genuine front-mounted multi-stage HYVA telescopic hydraulic cylinder, delivering maximum tipping leverage, reduced operating hydraulic pressure, and smooth body elevation.
- Automated Submerged-Arc Welded Frame: Main I-beams fabricated from high-strength Q345B/Q550/T700 steel via automated submerged-arc welding deliver superior longitudinal beam strength and long-term frame sag resistance.
- Steep 55° Clean Gravity Discharge: Achieves a steep elevation angle ensuring rapid, 100% complete gravity offloading of sand, crushed stone, coal, or ore without material hanging up inside.
3. Commercial Heavy Axles & Pneumatic Braking Safety
- 13T/16T Heavy Commercial Axles: Powered by commercial heavy-duty axles (FUWA, BPW, STEYR, or AQ) rated for 13 to 16 tons per axle, offering proven reliability and global spare parts availability.
- Dual-Line WABCO Air Braking: Dual-line pneumatic compressed air braking system equipped with WABCO emergency relay valves and T30/30+T30 spring brake chambers guarantees instant braking actuation and secure holding power during dumping operations.
- Automatic Tailgate Locking: Top-hinged heavy-duty tailgate unlatches automatically via mechanical/pneumatic linkage as the body elevates and seals tight upon lowering.
Commercial & Logistics Terms
- Shipping & Delivery: Shipped via Ro-Ro vessel, Bulk Cargo vessel, or stacked in SKD format to minimize international ocean freight costs.
- Warranty Coverage: 3-Year structural guarantee on the main chassis frame; 1-Year warranty covering axles, landing gear, hydraulic cylinder assembly, and braking valves.
- Payment Terms: 30% T/T deposit, 70% balance paid prior to dispatch; irrevocable L/C at sight accepted.
