Overview: 4X2 Tractor Truck for Global Markets

INDUSTRIAL SPECIFICATION REPORT 2026: EXECUTIVE OVERVIEW

Document ID: SL-TRAC-4×2-EO-2026
Prepared For: Fleet Managers, Construction & Logistics Operations Directors

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1. EXECUTIVE OVERVIEW: 4×2 TRACTOR TRUCK PLATFORM

SEA LION International presents the 4×2 Tractor Truck as a mission-optimized solution for high-utilization hauling cycles across mining support, regional logistics, and heavy construction sectors. Engineered for operational efficiency on prepared surfaces and semi-prepared infrastructure, this configuration delivers a critical balance of payload capacity, fuel economy, and maintenance simplicity where 6×4 drivetrains introduce unnecessary weight and complexity.

Core Operational Advantages

• Payload Optimization: Reduced tare weight (vs. 6×4) maximizes revenue-generating payload within regional gross vehicle mass (GVM) limits, directly improving tonne-kilometer efficiency.
• Fuel Efficiency: Streamlined driveline and lower rolling resistance yield 8-12% demonstrable fuel savings in comparative route trials (validated across 500,000+ km in target regions).
• Maintenance & Uptime: Simplified axle configuration reduces component count, service intervals, and failure points. Achieves 95%+ fleet availability with scheduled maintenance.
• Maneuverability: Tighter turning radius (≤ 12.5m) enhances site navigation in confined construction zones and urban logistics hubs.

Regional Market Preference Drivers

The 4×2 Tractor Truck dominates in Africa, Russia, and Southeast Asia due to alignment with specific infrastructure and operational realities:

Region	Primary Application	Key Preference Drivers	SEA LION Value-Add
Africa	Mining Support Haulage, Regional Logistics	Cost-per-tonne efficiency on improving paved/semi-paved corridors; Ruggedized suspension for laterite roads; Low-cost maintenance in remote areas	Refurbished units with reinforced chassis; On-ground parts depots (Johannesburg, Nairobi); Cold-weather kits for East African highlands
Russia	Long-Haul Logistics (Non-Arctic), Construction	Fuel economy critical for vast distances; Simplified cold-start reliability (-35°C); Lower TCO on federal highways (M-5, M-10)	Engine block heaters, Arctic-grade lubricants; Dedicated Siberian service network; Compliance with GOST R 41.03-2003
Southeast Asia	Port Logistics, Aggregate Haulage	Maneuverability in congested ports/urban sites; High humidity corrosion resistance; Optimal for 300-800km regional routes	Marine-grade electrical sealing; Monsoon-ready brake systems; Parts hubs in Singapore & Batam

SEA LION International’s Technical Assurance

Leveraging 18+ years as an authorized distributor for SINOTRUK, SHACMAN, and XCMG, we mitigate operational risk through:
Professional Refurbishment: All units undergo 127-point technical recertification (ISO 9001:2015), including engine dyno testing, chassis straightening, and electrical system validation.
Genuine Parts Integrity: 98% availability of OEM spare parts (SINOTRUK HOWO, SHACMAN F3000, XCMG L-series) via global logistics network (RO-RO/Container), ensuring component longevity.
Long-Term Partnership Model:* Transparent cost-of-ownership reporting, technical training for maintenance teams, and lifecycle support contracts to guarantee >5-year operational viability.

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CONCLUSION

The 4×2 Tractor Truck is not merely a cost-effective asset but a strategic enabler for high-volume, infrastructure-constrained operations across Africa, Russia, and Southeast Asia. SEA LION International eliminates procurement and operational uncertainty through engineered reliability, regional technical adaptation, and a commitment to transparent partnership. This platform delivers quantifiable reductions in total cost of ownership (TCO) while maximizing fleet utilization under demanding real-world conditions.

// END OF EXECUTIVE OVERVIEW //
SEA LION International Trade Co., Ltd. — Technical Excellence in Global Heavy Transport Solutions

Technical Specifications & Parameters

Industrial Specification Report 2026

Target Audience: Fleet Managers & Construction Companies
Vehicle Type: 4×2 Tractor Truck
Application: Heavy-Duty On-Road Haulage, Construction Logistics, Long-Haul Freight

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Technical Specifications

Parameter	Specification
Engine Model	Weichai WD615
Engine Type	In-line 6-cylinder, Water-cooled, Turbocharged & Intercooled Diesel
Displacement	9.726 L
Horsepower (HP)	336 HP @ 2,200 rpm
Max Torque	1,250 N·m @ 1,200–1,600 rpm
Emission Standard	China VI (Equivalent to Euro VI)
Transmission	HW19710 – 10-Speed Manual (10F/2R), Dual H-shift, Pneumatic Actuation
Clutch	430 mm, Dual-plate, Pneumatically Assisted
Front Axle Load	7,000 kg (15,432 lbs)
Rear Axle Load	11,500 kg (25,353 lbs)
Total Axle Load	18,500 kg (40,785 lbs) – Compliant with GB1589-2016
Drive Configuration	4×2 (Rear-Wheel Drive)
Tire Specifications	12.00R20, Radial, Tubeless, 18PR (Load Range G), All-Steel Carcass
Tire Application	Front & Drive Axle – Optimized for Load Stability & Abrasion Resistance
Fuel Tank Capacity	400 L (Standard), Optional 600 L Steel Tank
Frame Type	Double-layer Reinforced U-Channel, 8 mm Thickness, High-Tensile Steel
Suspension (Front)	Parabolic Leaf Spring with Hydraulic Shock Absorbers
Suspension (Rear)	Multi-Leaf Semi-Elliptic, Equalizing Beam System
Braking System	Dual-Circuit Air Brake, ABS, EBS (Optional), Exhaust Brake (Engine Retarder)
Cab Configuration	Day Cab / Sleeper Cab (Optional), Anti-Roll Steel Frame, Anti-Intrusion Design

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Fuel Efficiency Analysis

The Weichai WD615 engine, integrated with high-efficiency fuel injection and optimized combustion chamber design, delivers industry-leading fuel economy under heavy-load conditions. When paired with the HW19710 transmission’s wide gear ratio spread and precise shift mapping, the 4×2 tractor achieves:

• Average Fuel Consumption: 28–32 L/100 km (loaded, mixed terrain)
• Optimized Cruising Efficiency: 24–26 L/100 km (on-highway, 80–90 km/h, 30-ton GCW)
• ECO Mode Functionality: Reduces engine output by 5–8% under light-load scenarios, improving fuel savings by up to 6%
• Aerodynamic Enhancements: Roof fairing, side deflectors, and low-rolling-resistance tires contribute to reduced drag and fuel use

Fuel efficiency is further enhanced by predictive cruise control (optional), which leverages GPS terrain data to optimize gear selection and throttle response.

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Load Capacity & Operational Performance

• Maximum GCW (Gross Combination Weight): 40,000 kg (88,185 lbs)
• Tractor Kerb Weight: ~8,500 kg (18,739 lbs)
• Effective Payload Capacity: Up to 31,500 kg (69,445 lbs), depending on trailer configuration
• Fifth Wheel Rating: Jost JFK 350, 16,000 kg Vertical Load Capacity, ISO 337–D80
• Towing Hitch: Rear recovery tow hook (50,000 N rating)

The 4×2 configuration provides optimal weight distribution for regional haul and construction logistics, minimizing tire wear and improving maneuverability in confined sites. The 12.00R20 tire specification ensures high load-bearing capability (up to 2,650 kg per tire at 850 kPa) and extended tread life under abrasive site conditions.

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Summary for Fleet Deployment

This 4×2 tractor truck, powered by the Weichai WD615 engine and HW19710 transmission, is engineered for reliability, fuel efficiency, and high payload throughput in demanding industrial environments. Its balanced axle load distribution, robust drivetrain, and durable tire setup make it ideal for:

• Aggregate and bulk material transport
• Prefabricated construction component delivery
• Regional freight corridors with mixed road quality

Fleet managers will benefit from low TCO (Total Cost of Ownership), extended service intervals (up to 40,000 km oil drain), and proven Weichai-Hanwang drivetrain synergy in high-utilization cycles.

Quality Control & Inspection Standards

SEA LION INTERNATIONAL

INDUSTRIAL SPECIFICATION REPORT: MODEL XT-420 4×2 TRACTOR TRUCK
REPORT YEAR: 2026 | REF: SLI-XT420-MFG-PDI-2026

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1. EXECUTIVE SUMMARY

This report details the manufacturing quality control protocols and Pre-Delivery Inspection (PDI) standards for the SEA LION XT-420 4×2 Tractor Truck, engineered explicitly for high-stress construction and off-highway applications. Focus areas include chassis structural integrity under dynamic torsional loads and engine system longevity in extreme thermal/dust environments. All specifications comply with ISO 14959:2023 (Commercial Vehicle Frame Strength) and SAE J3080 (Heavy-Duty Engine Durability Testing).

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2. MANUFACTURING QUALITY: CHASSIS SYSTEMS (ROUGH TERRAIN OPTIMIZED)

2.1. Material & Construction Specifications

Component	Specification	Validation Standard	Tolerance
Frame Rails	High-strength low-alloy (HSLA) steel, 1200 MPa yield strength	ASTM A1011/A1011M	±0.3mm
Crossmembers	Hydroformed, 1000 MPa steel, 8mm thickness	SEA LION SL-STD-007 (2025)	±1.0° angle
Suspension Mounts	Forged alloy steel, shot-peened surface	ISO 6987	0.05mm flatness
Stone Guards	8mm AR400 abrasion-resistant steel	ASTM A514/A514M	N/A

2.2. Critical Quality Assurance Processes

• Frame Assembly: Robotic MIG welding with real-time ultrasonic monitoring (defect detection sensitivity: 0.5mm).
• Torsional Rigidity Test: Chassis subjected to 15,000 Nm dynamic twist load (simulating 30° cross-slope terrain). Maximum allowable deflection: ≤ 8.5mm/meter.
• Fatigue Validation: 500,000-cycle road load spectrum test (SAE J2810) replicating quarry/dump site conditions. Zero structural cracks permitted.
• Corrosion Protection: 120μm zinc-nickel electrocoat + 60μm polyurethane primer. Salt spray resistance: ≥ 1,500 hours (ASTM B117).

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3. MANUFACTURING QUALITY: ENGINE SYSTEMS (DURABILITY FOCUS)

3.1. Engine Platform: SEA LION X15HD (15.0L Inline-6 Turbo Diesel)

Parameter	Specification	Validation Method	Pass Criteria
Block Material	Compacted graphite iron (CGI)	ASTM A842	Hardness 240-260 HB
Cylinder Liners	Plasma-sprayed iron, 0.8mm thickness	ASTM G77	Wear < 0.02mm/100k km
Bore/Stroke	137mm x 169mm	CMM Verification	±0.01mm
B10 Life Expectancy	1.2 million miles	SAE J2757 Accelerated Test	<10% failure rate
Oil Consumption	≤ 0.5% fuel dilution at 500k miles	ASTM D7592	Verified at 100k intervals

3.2. Critical Durability Enhancements

• Thermal Management: Dual-circuit cooling system (separate EGR/charge air circuits). Max coolant temp delta: ≤ 8°C under 100% load @ 50°C ambient.
• Dust Ingress Protection: 3-stage air filtration (pre-cleaner + 99.97% efficient main filter). Validated per ISO 5011 at 3g/m³ dust load.
• Component Hardening: Crankshaft nitrided to 750 HV surface hardness; connecting rods shot-peened to 400 MPa compressive stress.

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4. PRE-DELIVERY INSPECTION (PDI) PROTOCOLS

4.1. Chassis Structural Verification

PDI Step	Procedure	Acceptance Criteria
Frame Geometry Check	Laser alignment of 12 critical points (SAE J157)	Deviation ≤ 3mm from CAD nominal
Suspension Load Test	Apply 150% GVWR static load; measure deflection	Spring rate variance ≤ 5% from spec
Fastener Torque Audit	100% verification of Grade 10.9+ chassis bolts (torque-to-yield protocol)	±5% of target torque value
Impact Simulation	Drop test: 150mm height onto reinforced crossmember	Zero plastic deformation; weld integrity intact

4.2. Powertrain Durability Verification

PDI Step	Procedure	Acceptance Criteria
Cold-Start Cycle	-25°C simulated start; verify oil pressure ramp (SAE J1754)	Pressure ≥ 25 psi within 8 seconds
EGR System Calibration	Flow test at 3 load points (idle, 50%, 100% load)	Deviation ≤ 2% from map
Exhaust Backpressure Check	Measure at DPF inlet under full load	≤ 25 kPa (prevents turbo overspeed)
Oil Analysis Snapshot	Spectrometric analysis of first 5L oil run	Wear metals < 50 ppm (Fe, Al, Cu)

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5. CONCLUSION

The XT-420 4×2 Tractor Truck chassis achieves 22% higher torsional rigidity versus 2025 industry benchmarks (via FEA validation per ISO 12003-2), directly translating to reduced frame fatigue in off-camber operations. Engine manufacturing processes target <0.8% annual failure rate in construction fleets, validated through 300,000-mile field trials across 12 global sites. All PDI checkpoints are non-negotiable pass/fail criteria; units failing any step undergo 100% disassembly per SEA LION SL-QMS-012. This integrated approach ensures operational readiness for 10,000+ hour duty cycles in unimproved terrain.

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END OF REPORT
SEA LION International | Engineering Division | Confidential: For Fleet Management Review Only

Shipping & Logistics Solutions

Industrial Specification Report 2026

Prepared for: Fleet Managers & Construction Companies
Subject: Export Logistics Solutions for 4×2 Tractor Truck from China
Document Code: ISR-LOG-2026-042T
Revision: 1.2
Date: 2026-04-05

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Executive Summary

This report evaluates three primary maritime transport methods for exporting 4×2 Tractor Trucks from manufacturing hubs in China (e.g., Qingdao, Shanghai, Guangzhou) to global destinations. The comparison focuses on Roll-on/Roll-off (RO-RO), Bulk Cargo (Loose Vessel Loading), and Flat Rack Container shipping. Key performance indicators include cost, transit time, handling efficiency, vehicle integrity, and corrosion protection, with emphasis on wax-based anti-corrosion treatments for seawater exposure mitigation.

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1. Equipment Profile: 4×2 Tractor Truck

Parameter	Specification
Configuration	4×2 (Single Drive Axle)
GVWR	16,000–18,000 kg
Length	5,800–6,200 mm
Width	2,500–2,550 mm
Height	2,900–3,100 mm
Weight (Curb)	6,200–7,000 kg
Fuel Type	Diesel / CNG (varies)
Origin Hubs	Qingdao, Shanghai, Shenzhen, Guangzhou
Target Destinations	Middle East, Africa, Southeast Asia, Latin America

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2. Shipping Method Comparison

Criteria	RO-RO	Bulk Cargo	Flat Rack
Loading Mechanism	Driven on/off vessel via ramps	Craned/lifted individually into hold	Secured on open-frame 20′ or 40′ flat rack containers
Containerization	Not containerized	Not containerized	Semi-containerized (ISO flat rack)
Protection Level	Moderate (exposed deck areas)	Low (exposed to hold conditions)	High (custom lashings, optional tarpaulin cover)
Handling Speed	High (vehicles roll under own power)	Low (requires crane rigging per unit)	Medium (requires lifting but standardized)
Risk of Damage	Low (controlled movement)	Medium–High (rigging impact, shifting)	Low (if properly secured)
Port Infrastructure Needs	RO-RO terminal with ramp access	General cargo crane availability	Container crane + flat rack handling
Transit Time (Avg)	28–35 days (Asia to MENA)	30–40 days	28–34 days
Cost per Unit (USD)	$1,800–$2,400	$1,500–$2,000	$2,600–$3,200
Scalability (Fleet Volume)	High (100+ units per vessel)	Medium (limited by crane ops)	Medium (container slot availability)
Customs Clearance	Straightforward (unit-level tracking)	Moderate (bulk manifests)	High (containerized, traceable)
Ideal Use Case	High-volume fleet exports to RO-RO-equipped ports	Low-cost, non-time-sensitive shipments	Sensitive or high-value units; restricted port access

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3. Corrosion Protection: Wax Spraying System

3.1 Requirement

Extended maritime exposure to salt-laden air and condensation increases risk of galvanic and surface corrosion on undercarriage, chassis rails, fasteners, and brake components.

3.2 Recommended Solution: Temporary Wax-Based Anti-Corrosion Coating

Feature	Specification
Product Type	Solvent-based, hydrophobic wax emulsion
Application Method	High-pressure spray (automated booth or manual)
Coverage Areas	Chassis frame, suspension components, wheel hubs, fuel tanks, battery trays
Film Thickness	20–30 µm (uniform coat)
Salt Spray Resistance (ASTM B117)	>500 hours
Removability	Biodegradable solvent or pressure wash (post-delivery)
Application Point	Pre-loading at OEM or CFS (Container Freight Station)

3.3 Benefits by Shipping Method

Method	Wax Protection Benefit
RO-RO	High exposure to sea spray; wax prevents undercarriage corrosion during deck stowage
Bulk Cargo	Humid cargo holds promote condensation; wax shields joints and weld seams
Flat Rack	Full environmental exposure; wax + tarpaulin offers optimal protection

Note: Wax treatment is recommended for all export shipments exceeding 14 days at sea. SEA LION International applies ISO 12944-compliant coating protocols at staging yards.

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4. Risk & Mitigation Overview

Risk Factor	RO-RO	Bulk Cargo	Flat Rack
Seawater Exposure	High (deck-level)	Medium (below deck, but humid)	High (open-air)
Impact Damage	Low	Medium (rigging)	Low (if secured)
Theft/Vandalism	Low	Medium	Low
Delay Risk	Low (fast turnaround)	Medium (weather, crane delays)	Medium (container shortages)
Corrosion (Unprotected)	High	Medium–High	High
Corrosion (Wax-Protected)	Low–Moderate	Moderate	Low–Moderate

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5. Recommendations

Scenario	Recommended Method	Rationale
Large Fleet (50+ units), RO-RO Port Access	RO-RO	Cost-effective, rapid loading, proven logistics
Budget-Constrained, Non-RO-RO Port	Bulk Cargo + Wax Spray	Lowest cost; wax mitigates high corrosion risk
High-Value Units or Harsh Climate Destinations	Flat Rack + Wax + Tarpaulin	Maximum protection, traceability, and security
Mixed Fleet with Other Equipment	Flat Rack	Enables multimodal container use

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6. Compliance & Standards

• IMO Guidelines: RO-RO safety (SOLAS Chap. VI & VII)
• CTU Code: Cargo Transport Unit standards for flat rack lashing
• ISO 1496-4: Flat rack container specifications
• ASTM D1193: Water quality for wax emulsion preparation
• IATA/IMDG: Not applicable (non-hazardous vehicles)

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Conclusion

For 4×2 Tractor Truck exports from China, RO-RO remains the optimal balance of cost and efficiency for high-volume operations at compatible ports. Flat Rack is superior for asset protection in corrosive environments, especially when combined with industrial wax spraying. Bulk Cargo is viable only under strict cost constraints and with mandatory anti-corrosion treatment.

SEA LION International recommends integrating automated wax-spray systems at staging facilities as a standard export protocol, regardless of shipping method, to ensure long-term vehicle integrity and reduce post-import rework.

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End of Report
SEA LION International – Engineering Logistics Division
All data based on Q1 2026 market analysis and OEM collaboration trials