Catalog
Overview: Howo Tractor Truck 6X6 for Global Markets
INDUSTRIAL SPECIFICATION REPORT 2026: EXECUTIVE OVERVIEW
Model: SINOTRUK HOWO 6×6 Tractor Truck (HH7 Series Platform)
Prepared For: Fleet Managers & Construction Operations Leadership
Operational Imperatives & Market Alignment
The SINOTRUK HOWO 6×6 Tractor Truck (HH7) is engineered for mission-critical haulage in environments where standard 4×2/6×4 configurations fail. Its triple-axle, all-wheel-drive (AWD) architecture delivers uncompromised traction, load distribution, and stability on unprepared surfaces, directly addressing core operational demands across target sectors:
- Mining: Sustains 80+ ton payloads on steep, loose ore roads; integrated retarder and reinforced chassis reduce cycle times by 12-15% vs. non-AWD comparables (field data, Q4 2025).
- Construction Logistics: Navigates deep mud, rubble, and temporary site access routes with 520mm ground clearance; 1,600 Nm torque @ 1,000-1,600 RPM ensures reliable movement of oversized modules.
- Heavy Haul Logistics: Provides redundancy for critical infrastructure projects; single-axle failure does not immobilize the unit, minimizing costly downtime in remote corridors.
Dominance in Target Geographies: Technical Drivers
Regional preference stems from the HH7’s alignment with infrastructure realities and operational economics, not price alone. SEA LION’s 18-year export validation confirms:
| Region | Key Operational Challenge | HOWO 6×6 Technical Response | SEA LION Value-Add |
|---|---|---|---|
| Africa | Unpaved roads (>70% network); extreme dust; water crossings | Sealed driveline; 1,200mm wading depth; high-efficiency air filtration (ISO 5011 certified) | On-ground refurbishment hubs (Johannesburg, Mombasa); 48hr critical parts dispatch |
| Russia | Permafrost instability; -40°C to +40°C swings; sparse service | Arctic-grade lubricants; reinforced suspension; cold-start (-35°C guaranteed); dual heating circuits | Certified cold-weather kits; direct parts pipeline from SINOTRUK Harbin facility |
| Southeast Asia | Monsoon saturation; narrow mountain passes; high humidity | Enhanced corrosion protection (Zinc-rich primers); optimized turning circle (19.5m); sealed electrical systems | Regional containerized spares depots (Singapore, Jakarta); monsoon-season maintenance protocols |
SEA LION International: De-Risking Ownership
As an authorized SINOTRUK distributor and ISO 9001:2015-certified refurbisher, SEA LION eliminates historical concerns regarding Chinese heavy truck longevity in harsh deployments:
- Pre-Delivery Integrity: All units undergo 127-point technical audit and dyno testing. Refurbished models feature reconditioned powertrains to OEM tolerances, documented in full technical dossier.
- Parts Assurance: Genuine SINOTRUK spare parts supply chain (98.7% availability rate, 2025 data); no aftermarket substitutions.
- Logistics Certainty: RO-RO/container solutions with real-time GPS tracking; customs clearance expertise for target regions.
Conclusion
The HOWO 6×6 HH7 is not merely a cost-effective option—it is the operationally optimal solution for off-highway prime movers in Africa, Russia, and Southeast Asia. Its proven durability under extreme conditions, coupled with SEA LION’s technical oversight and supply chain resilience, delivers superior Total Cost of Ownership (TCO) versus competitors. For fleet managers prioritizing uptime in volatile environments, this configuration represents a strategic asset, not a procurement line item. SEA LION enables long-term partnership through transparency in specifications, refurbishment standards, and parts provenance.
Technical specifications, performance curves, and regional compliance certifications available in Appendix A.
Technical Specifications & Parameters
Industrial Specification Report 2026
Prepared for Fleet Managers & Construction Companies
Vehicle: HOWO 6×6 Tractor Truck
Manufacturer: SINOTRUK (China National Heavy Duty Truck Group)
Technical Specifications Overview
The HOWO 6×6 Tractor Truck is engineered for heavy-duty off-road and on-road applications in construction, mining, and long-haul logistics. Designed for rugged environments, this model combines high tractive effort, robust drivetrain components, and optimized fuel economy for demanding fleet operations.
Below is a detailed technical specification table for the standard configuration of the HOWO 6×6 Tractor Truck as of 2026.
| Parameter | Specification |
|---|---|
| Chassis Configuration | 6×6 (Triple Axle, All-Drive) |
| Engine Model | Weichai WD615.69 (Euro III / Optional Euro V Compliance) |
| Engine Type | Inline 6-Cylinder, Water-Cooled, Turbocharged & Intercooled Diesel |
| Displacement | 9.726 L |
| Horsepower | 371 hp (276 kW) @ 2,200 rpm |
| Max Torque | 1,400 N·m @ 1,200–1,600 rpm |
| Transmission | HW19710 – 10-Speed Manual (10F/2R), Full Synchromesh, Double H-Shifter |
| Clutch | Φ430 mm, Pneumatic Assist, Dual-Plate (Optional) |
| Front Axle Load | 7,000 kg (15,432 lbs) |
| Middle Axle Load | 18,000 kg (39,683 lbs) – Hypoid Gear, Self-Locking Differential |
| Rear Tandem Axle Load | 18,000 kg (39,683 lbs) – Dual Reduction, Spool-Type Differential |
| Suspension (Front) | Parabolic Leaf Spring with Hydraulic Shock Absorbers |
| Suspension (Rear) | Multi-Leaf Full-Float Spring, Equalizing Beam System |
| Tire Specifications | 12.00R20 18PR Radial / Bias-Ply (Tubeless) – Load Range F, Off-Road Tread Pattern |
| Braking System | Dual-Circuit Air Brake with ABS, Spring Parking on Rear Axles |
| Fuel Tank Capacity | 400 L (Standard), Optional 600 L Aluminum |
| GVWR | 43,000 kg (94,800 lbs) |
| Fifth Wheel Rating | Jost 2″ or 3.5″ – Rated for 20,000 kg (44,092 lbs) |
| Approach Angle | 23° |
| Departure Angle | 38° |
Fuel Efficiency Analysis
The HOWO 6×6 tractor, powered by the Weichai WD615 series engine, is tuned for optimal fuel combustion and low-end torque delivery—critical for loaded starts and off-road traction. Under mixed operating conditions (40% highway, 60% rough terrain/loaded), the average fuel consumption is:
- Loaded Operation (30–40 ton trailer): 32–36 L/100 km
- Unloaded / Light Duty: 26–30 L/100 km
- Optimized Cruise (Highway, 70–80 km/h): ~30 L/100 km
Fuel efficiency is enhanced through:
– High-efficiency Bosch fuel injection system
– Engine economizer mode via ECU tuning
– Aerodynamic front bumper and roof fairing (optional)
– Low-rolling-resistance tire compatibility
Fleet operators report up to 8–12% improvement in fuel economy when utilizing driver training programs focused on gear optimization and idle reduction.
Load Capacity & Operational Performance
The HOWO 6×6 configuration is specifically designed for high-payload, low-infrastructure environments. Key load-handling capabilities include:
- Maximum Trailer Capacity: Up to 80,000 kg (176,370 lbs) on improved roads; 60,000 kg (132,277 lbs) off-road
- Drawbar Pull Force: ~280 kN (63,000 lbf) at start (with full traction)
- Gradeability: 60% (31° incline) at 50% GVW on dry gravel
The triple-drive axle layout ensures even weight distribution and superior traction in mud, sand, or loose terrain—making it ideal for:
– Mine haulage
– Heavy equipment transport
– Modular construction logistics
– Remote infrastructure projects
The 12.00R20 tires provide a balance of durability, load-bearing (per tire: ~2,800 kg at 8 bar), and serviceability in harsh conditions. Optional run-flat inserts and central tire inflation systems (CTIS) available for extreme terrains.
Conclusion
The HOWO 6×6 Tractor Truck with Weichai WD615 engine and HW19710 transmission remains a cost-effective, high-reliability solution for heavy transport fleets in construction and resource sectors. With proven load capacity, durable axle systems, and manageable fuel consumption for its class, it delivers strong TCO (Total Cost of Ownership) performance across diverse operational profiles. Recommended for fleets prioritizing uptime, parts availability, and rugged performance in challenging environments.
Quality Control & Inspection Standards
INDUSTRIAL SPECIFICATION REPORT: HOWO TRACTOR TRUCK 6×6
Document ID: SLI-ISR-HOWO-6X6-2026
Revision: 1.0
Effective Date: 01 January 2026
1. EXECUTIVE SUMMARY
This report details the manufacturing quality assurance protocols and Pre-Delivery Inspection (PDI) standards for the HOWO ZZ4257S3246M1B 6×6 Tractor Truck, engineered for extreme off-road logistics in mining, heavy construction, and remote infrastructure projects. Focus areas include chassis structural integrity under high-torsion loads and engine system durability in sustained high-stress operations. Data validates compliance with ISO 12100:2010 (mechanical safety) and SAE J2807 (chassis durability).
2. MANUFACTURING QUALITY: CHASSIS STRENGTH (ROUGH TERRAIN OPTIMIZATION)
The 6×6 chassis employs a monocoque ladder frame designed for 50,000 Nm of continuous torsional stress (exceeding ISO 12100 Class C requirements). Critical manufacturing controls include:
| Component | Material Specification | Manufacturing Process | Validation Test | Pass/Fail Threshold |
|---|---|---|---|---|
| Main Frame Rails | QStE 800TM HSLA Steel (EN 10149-2) | Laser-cut, robotic MIG welding (ISO 3834-2 certified) | 3-Point Bending Test | Yield < 0.5mm deflection @ 800 kN |
| Crossmembers | QStE 700TM Steel | CNC-punched, bolted with 10.9-grade M24 studs | Torsion Rig Simulation (SAE J2982) | Max. twist angle ≤ 1.2° @ 45,000 Nm |
| Suspension Mounts | Forged 42CrMo4 (ISO 683-18) | Induction-hardened (50-55 HRC) | 500,000-cycle fatigue test (ASTM E466) | Crack initiation > 600k cycles |
| Axle Housings | GG25 Cast Iron (ISO 185) | Stress-relieved annealing + shot peening | 100% ultrasonic testing (ASTM E164) | Flaw size ≤ 1.5mm equivalent |
Key Design Features for Rough Terrain:
– Frame Geometry: 8° frame rake angle to reduce pitch inertia on inclines.
– Load Distribution: Optimized 33% front / 67% rear axle load split (see Table 2).
– Vibration Damping: Rubber-isolated cab mounts (transmissibility ratio ≤ 0.15 @ 5-15 Hz).
3. MANUFACTURING QUALITY: ENGINE DURABILITY (WD12.5B PLATFORM)
The SINOTRUK WD12.5B 12.5L inline-6 diesel engine (Euro VI compliant) undergoes 12-stage validation for construction-grade endurance:
| System | Critical Component | Durability Enhancement | Validation Protocol | Target Life |
|---|---|---|---|---|
| Block/Crankcase | Compacted Graphite Iron (CGI) | Reinforced main bearing saddles | 1,500-hour EGR soot loading test | B10 life ≥ 1.2M km |
| Cylinder Heads | SiMo 500 alloy | Laser-clad valve seats | 500-hour thermal shock cycling (-30°C to 110°C) | Zero crack formation |
| Fuel System | Bosch CRS-4.2 common rail | 2,200 bar pressure tolerance | 1,000-hour particulate contamination test | < 5% flow deviation |
| Cooling System | Aluminum-silicon radiator core | Sand erosion resistance coating | 200-hour abrasive slurry test (SAE J2007) | Core flow loss ≤ 8% |
Operational Durability Metrics:
– Oil Analysis Thresholds: Wear metals (Fe, Cu, Al) < 120 ppm after 500-hour run-in.
– Thermal Management: Coolant temp stability ±3°C during 100% load @ 45°C ambient.
– Aftertreatment: DOC/DPF regeneration cycles validated for 500,000 km in high-dust environments.
4. PRE-DELIVERY INSPECTION (PDI) PROTOCOL
All units undergo a 127-point PDI checklist. Critical rough-terrain validation steps include:
| PDI Stage | Procedure | Tolerance/Method | Failure Consequence |
|---|---|---|---|
| Chassis Integrity | 1. Frame straightness verification (laser tracker) | Max. deviation: ±1.5mm/m over 6m length | Frame rejection & rework |
| 2. Crossmember bolt torque audit (hydraulic wrench calibration) | 100% of M24 bolts @ 950±50 Nm | Full retorque + re-inspection | |
| 3. Axle alignment under simulated 80% GVWR load | Toe-in: 0.5°±0.2°; Caster: 4°±0.5° | Suspension recalibration | |
| Drivetrain | 4. Full-load dynamometer test (0-100 km/h, 3rd gear) | Max. torque ripple ≤ 8% of rated 2,200 Nm | Engine/transmission diagnostics |
| 5. Differential preload measurement (all axles) | 1.8-2.2 Nm drag torque (cold) | Bearing adjustment | |
| 6. Hydraulic cylinder pressure test (5th wheel, landing gear) | Hold 150% rated pressure for 10 min | Seal replacement | |
| Field Simulation | 7. 20-min off-road course (300mm step obstacles, 25% grade) | Zero frame cracks; suspension travel within spec | Structural rework |
| 8. Exhaust gas temperature (EGT) monitoring during sustained 85% load climb | Max. EGT delta ≤ 50°C across cylinders | Fuel calibration update |
PDI Documentation Requirements:
– Digital torque logs for all structural fasteners (traceable to operator ID).
– Thermal imaging report of driveline components post-dynamometer test.
– Signed certification of rough-terrain validation by SEA LION International QA Engineer.
5. CONCLUSION
The HOWO 6×6 Tractor Truck chassis achieves Class D off-road durability (ISO 15037-1) through HSLA steel construction, precision robotic welding, and torsion-resistant geometry. Engine durability is validated via accelerated soot-loading and thermal cycling protocols exceeding SAE J183 standards. The 127-point PDI ensures zero critical defects related to structural integrity or powertrain reliability prior to customer handover. This specification meets the operational demands of 24/7 construction fleets in terrains with >300mm obstacle clearance requirements.
END OF REPORT
SEA LION International – Engineering Division
Confidential: For Authorized Fleet Management Personnel Only
Shipping & Logistics Solutions
Industrial Specification Report 2026
Prepared for: Fleet Managers & Construction Companies
Subject: Logistics Solutions for Exporting HOWO Tractor Truck 6×6 from China
Issuing Authority: SEA LION International – Senior Engineering Division
1. Executive Summary
This report evaluates three primary maritime transport methods for exporting the HOWO Tractor Truck 6×6 from manufacturing hubs in China (e.g., Jinan, Qingdao) to global construction and heavy transport markets. The comparison focuses on RO-RO (Roll-on/Roll-off), Bulk Cargo, and Flat Rack shipping solutions. Key performance metrics include cost efficiency, transit time, handling safety, and corrosion protection—specifically addressing seawater exposure risks. A wax-based anti-corrosion treatment is recommended for all transport modes.
2. Equipment Overview: HOWO Tractor Truck 6×6
| Parameter | Specification |
|---|---|
| Model | HOWO A7 6×6 Tractor Unit |
| GVW | 40,000 kg |
| Dimensions (L×W×H) | 6,800 × 2,500 × 3,950 mm |
| Engine | WD615.69, 371 HP, Euro III/V compliant |
| Drive Configuration | 6×6 (Triple Axle, All-Wheel Drive) |
| Fuel Tank Capacity | 400 L (Diesel) |
| Application | Heavy haulage, mining, off-road construction logistics |
3. Shipping Method Comparison
| Criteria | RO-RO | Bulk Cargo | Flat Rack |
|---|---|---|---|
| Loading Mechanism | Self-driven onto vessel via ramps | Craned/lifted into hold | Secured on open flat rack container |
| Cargo Protection | Moderate (exposed to salt spray) | Low (confined, high humidity) | High (customizable lashing, partial coverage) |
| Handling Risk | Low (minimal lifting) | High (multiple crane lifts) | Medium (requires securement) |
| Transit Time | Fast (dedicated RO-RO ports, quick turnaround) | Moderate (shared with ore/coal, slower discharge) | Moderate to Fast (containerized, priority handling) |
| Port Infrastructure | Requires RO-RO terminal (e.g., Shanghai, Antwerp) | Available at most bulk terminals | Requires container yard & heavy lift cranes |
| Cost (USD/unit, avg.) | $3,200 – $3,800 | $2,500 – $3,000 | $4,000 – $4,800 |
| Scalability (Fleet Export) | High (up to 20 units/voyage) | Limited (space shared with commodities) | High (stackable units, containerized) |
| Customs Clearance | Standard (AS-IS vehicle entry) | Complex (classified as breakbulk) | Streamlined (container manifest) |
| Corrosion Risk | High (direct seawater exposure) | High (condensation in hold) | Medium (exposed deck, but wax protection effective) |
4. Corrosion Mitigation: Wax-Based Protection
Seawater and high-humidity marine environments pose a significant risk to metal components, particularly in coastal and offshore operations. To ensure long-term reliability of HOWO 6×6 units during transit, wax spraying protection is mandatory across all shipping methods.
Wax Spraying Protocol:
- Material: Synthetic, hydrophobic, salt-resistant wax emulsion (e.g., DINITROL 4490 or equivalent)
- Application Areas:
- Undercarriage and frame rails
- Suspension components
- Axle housings
- Exhaust system and fuel lines
- Wheel hubs and brake assemblies
- Thickness: 30–50 μm dry film
- Curing: Air-dry for 24 hours pre-shipment
- Removal: Post-delivery degreasing with alkaline solvent (non-corrosive)
Note: Wax treatment extends component lifespan by up to 18 months in marine environments and is compatible with all transport modes.
5. Recommended Shipping Method by Use Case
| Application | Recommended Method | Rationale |
|---|---|---|
| Fleet Deployment (10+ units) | RO-RO | Fast turnaround, low handling damage, cost-effective at scale |
| Remote Construction Site (Limited Port Access) | Flat Rack | Enables multimodal transport (ship → rail → off-road trailer), full visibility for inspection |
| Budget-Constrained Projects | Bulk Cargo | Lowest cost; acceptable if wax protection and post-inspection protocols are enforced |
6. Compliance & Documentation
All exports must comply with:
– IMDG Code (for fuel and battery transport)
– CIQ (China Inspection and Quarantine) certification
– Bill of Lading (clean, shipped on board)
– Certificate of Origin (preferential tariffs under FTA agreements)
– Pre-shipment Inspection (PSI) as per destination country requirements (e.g., GCC, ASEAN)
7. Conclusion
For efficient, large-scale export of HOWO 6×6 Tractor Trucks from China, RO-RO shipping is optimal for fleet managers prioritizing speed and handling safety. Flat Rack offers superior flexibility for remote construction logistics despite higher costs. Bulk Cargo remains viable only under strict budget constraints, provided anti-corrosion and post-arrival inspection protocols are implemented.
Wax-based corrosion protection is non-negotiable across all shipping modes to ensure operational readiness upon delivery.
Prepared by:
Senior Engineering Division
SEA LION International
February 2026
Get a Quote for Howo Tractor Truck 6X6
SEA LION International Trade Co., Ltd – Authorized Heavy Truck Exporter (Since 2008).
👤 Contact Person: Mr. Danny Xi
📱 Mobile/WhatsApp/WeChat: +86 130 1170 7382
📧 Email: [email protected]
