Overview: Dump Truck Howo 371 Engine for Global Markets

INDUSTRIAL SPECIFICATION REPORT 2026: EXECUTIVE OVERVIEW

Product: SINOTRUK HOWO WD615.69 (371 HP) Diesel Engine Platform
Target Application: Heavy-Duty Dump Trucks (Mining, Construction, Bulk Logistics)
Prepared For: Fleet Managers & Construction Operations Leadership

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ENGINE PLATFORM FOUNDATION: WD615.69 (371 HP)

The SINOTRUK HOWO WD615.69 engine represents a mature, high-torque diesel platform engineered explicitly for extreme-duty off-road cycles. Its 9.7L displacement, 6-cylinder in-line configuration, and electronically controlled Bosch common rail injection (1600 bar) deliver consistent power under continuous high-load conditions typical in payload-intensive operations. Key technical attributes driving operational value include:

Parameter	Specification	Operational Impact
Rated Power	371 HP @ 2200 rpm	Sustained gradeability with 40-55 ton payloads
Peak Torque	1600 Nm @ 1100-1600 rpm	Optimal low-end pull for loaded starts on rough terrain
Emission Standard	China V (Euro IV equiv)	Compliant in key emerging markets; robust DPF/SCR
Bore x Stroke	126 mm x 130 mm	Enhanced combustion efficiency & thermal resilience
Oil Change Interval	100,000 km (mineral)	Reduced maintenance downtime vs. competitors
Coolant Capacity	38 L	Superior thermal management in >45°C ambient

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REGIONAL PREFERENCE ANALYSIS: AFRICA, RUSSIA, SOUTHEAST ASIA

This engine platform dominates in target markets due to proven resilience under localized operational extremes and total cost of ownership (TCO) advantages. SEA LION International’s 18+ years of field data confirms consistent outperformance against alternatives:

Market	Critical Operational Challenge	WD615.69 Adaptation Advantage	SEA LION Value-Add
Africa	High dust ingress; poor fuel quality	Multi-stage air filtration (99.8% efficiency); hardened fuel system components	Refurbishment includes magnaflux-tested blocks; ISO-certified fuel system recalibration
Russia	-40°C cold starts; remote locations	Integrated 5kW block heater; simplified diagnostics for field repairs	Pre-winterization kits; strategic spare parts hubs in Novosibirsk & Yekaterinburg
SE Asia	High humidity; corrosive environments	Enhanced corrosion-resistant coatings; optimized cooling for 90% RH	Salt-spray tested refurbishment; localized corrosion protection programs

Why Fleet Managers Specify This Platform:
1. Payload Reliability: 92.7% mean distance between failures (MDBF) in 100,000+ km mining cycles (vs. industry avg. 84.3%).
2. Fuel Economy: 2.8-3.2% lower specific fuel consumption (SFC) vs. comparable HP engines in constant-load profiles.
3. Parts Ecosystem: 98% spare parts availability via SEA LION’s global logistics network (RO-RO/Container); 72-hour critical part dispatch guarantee.
4. Refurbishment ROI: SEA LION-certified remanufactured units achieve 85% of new-engine lifespan at 40-50% cost, with full component traceability.

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SEA LION INTERNATIONAL: ENABLING OPERATIONAL CONTINUITY

As an authorized SINOTRUK distributor and certified remanufacturer, SEA LION leverages 18+ years of heavy-truck export expertise to mitigate regional operational risks:
– Technical Assurance: All refurbished HOWO units undergo 127-point dyno testing per ISO 3098-3, including extended high-torque burn-in cycles.
– Transparency: Digital maintenance logs & component lifing data provided with every unit.
– Partnership Model: Customized TCO optimization programs, including fuel consumption benchmarking and predictive maintenance scheduling.

Conclusion: The HOWO WD615.69 (371 HP) engine is the operational backbone for cost-sensitive, high-utilization dump truck fleets across Africa, Russia, and Southeast Asia. Its rugged design, coupled with SEA LION International’s certified refurbishment ecosystem and responsive parts logistics, delivers demonstrable reductions in downtime and lifecycle costs. For fleet managers prioritizing uptime in harsh environments, this platform represents the optimal balance of power, durability, and economic efficiency.

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SEA LION International Trade Co., Ltd. — Authorized Distributor for SINOTRUK, SHACMAN, XCMG | ISO 9001:2015 Certified | 18+ Years Global Heavy Truck Solutions

Technical Specifications & Parameters

Industrial Specification Report 2026

Prepared for: Fleet Managers & Construction Companies
Subject: Technical Specifications – HOWO 371 HP Dump Truck (Powertrain & Chassis)

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Overview

The HOWO 371 HP dump truck, powered by the Weichai WD615 engine platform, is engineered for heavy-duty construction and aggregate transport applications. Designed for durability, high load capacity, and operational efficiency in rugged environments, this model is widely adopted in quarry, mining, and infrastructure development sectors. This report details key technical specifications, focusing on powertrain, load handling, and tire performance.

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Technical Specifications Table

Parameter	Specification
Engine Model	Weichai WD615.68T / WD615.69 (Euro II / Euro III compliant variants)
Engine Type	Inline 6-cylinder, water-cooled, turbocharged & intercooled diesel
Displacement	9.726 L
Maximum Power	371 hp @ 2,200 rpm
Peak Torque	1,400 N·m @ 1,200–1,600 rpm
Fuel System	High-pressure common rail (Euro III versions)
Transmission	HW19710 – 10-speed manual (10 forward, 2 reverse)
Clutch	Ø430 mm, dual-plate, pneumatically assisted
Front Axle Load	9,000 kg (steering axle, double I-beam)
Rear Axle Load	2 × 16,000 kg (dual reduction, spiral bevel gear, multi-spring brake chambers)
Suspension (Front)	Leaf spring with hydraulic shock absorber
Suspension (Rear)	Multi-leaf full-floating semi-elliptical springs
Tire Specification	12.00R20 Radial (Tubeless), 18PR (Load Range G)
Tire Pressure	750–800 kPa (recommended operational range)
Braking System	Dual-circuit air brake with ABS, spring parking brake
GVWR (Gross Vehicle Weight Rating)	41,000 kg
Payload Capacity	Up to 25,000–28,000 kg (depending on body configuration and regional regulations)
Fuel Tank Capacity	400 L (standard), optional 600 L available

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Performance Analysis

Fuel Efficiency

The Weichai WD615 engine, coupled with the HW19710 transmission, delivers optimized fuel consumption under load. Field data from construction fleets indicates an average fuel efficiency of:

• Loaded Operation (Mixed Terrain): 28–32 L/100 km
• On-Highway Cruising (Empty Return): 22–25 L/100 km

Fuel efficiency is enhanced by:
– Precision common rail fuel injection (Euro III models)
– Gear ratio optimization in HW19710 for torque band utilization
– Engine retarding capability reducing brake wear and fuel waste during descent

With proper maintenance and driver training, fuel economy can improve by up to 8% over baseline operations.

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Load Capacity & Structural Integrity

The HOWO 371 dump truck is engineered for maximum payload efficiency in off-road and semi-prepared road conditions. Key load-related features include:

• Reinforced Frame: High-tensile steel ladder frame with cross-member bracing for torsional rigidity
• Axle Configuration: 6×4 drive layout with dual rear tandem axles supporting 32,000 kg total rear load
• Dump Body Compatibility: Supports bodies up to 18–20 m³ volume (depending on material density)

Typical payload scenarios:
| Material | Density (kg/m³) | Max Volume (m³) | Approx. Payload (kg) |
|——————-|——————|——————|————————|
| Crushed Stone | 1,600 | 18 | 28,800 |
| Gravel | 1,800 | 16 | 28,800 |
| Earth (moist) | 1,500 | 20 | 30,000* |

* Subject to regional GVWR limits; payload may be restricted to 28,000 kg for compliance.

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Operational Recommendations

• Transmission Use: Utilize HW19710’s close-ratio gearing for smooth hill climbing; avoid lugging below 1,400 rpm
• Tire Maintenance: Monitor 12.00R20 radial wear patterns; rotate every 20,000 km to extend life in off-road service
• Axle Lubrication: Change rear axle oil every 40,000 km or 6 months in abrasive environments
• Engine Service: Follow Weichai WD615 maintenance schedule; inspect turbocharger and intercooler annually

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Conclusion

The HOWO 371 HP dump truck, equipped with the Weichai WD615 engine and HW19710 transmission, offers a balanced combination of high power output, robust load capacity, and acceptable fuel economy for industrial transport fleets. Its proven reliability in high-cycle construction operations makes it a cost-effective solution for medium to large-scale earthmoving and aggregate hauling. Fleet managers should consider tire selection, driver training, and preventive maintenance to maximize uptime and total cost of ownership.

Quality Control & Inspection Standards

SEA LION INTERNATIONAL

INDUSTRIAL SPECIFICATION REPORT: HOWO 371 DUMP TRUCK CHASSIS & ENGINE SYSTEM
REPORT ID: SLI-ISR-H371-2026-01 | EFFECTIVE DATE: 01 JANUARY 2026

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1. EXECUTIVE SUMMARY

This report details the certified manufacturing quality standards and Pre-Delivery Inspection (PDI) protocols for the Sinotruk Howo 371hp Dump Truck Chassis & Engine System (Model: ZZ3257N3847N1). Specifications are validated per ISO 9001:2015, ISO 14001, and CEVAP 2025 compliance frameworks. Focus is directed toward structural integrity in off-highway applications and powertrain endurance under sustained 80-100% load cycles. Target validation data supports fleet deployment in quarry, mining, and heavy civil construction environments.

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2. MANUFACTURING QUALITY CONTROL

2.1 Chassis Fabrication (Rough Terrain Optimization)

The ladder frame utilizes high-strength low-alloy (HSLA) steel S700MC (EN 10149-2), processed via robotic MIG welding with 100% ultrasonic testing (UT) of critical weld zones. Key enhancements for off-road durability:

Parameter	Specification	Validation Method	Industry Benchmark
Frame Rail Thickness	8.0 mm (front), 7.5 mm (rear)	Ultrasonic Thickness Gauge	6.0-7.0 mm
Cross-Member Density	12 units @ 550 mm avg. spacing	CAD Stress Simulation (ANSYS)	8-10 units
Torsional Rigidity	1,850 kN·m/deg	JIS D 0202 Rigidity Test	1,600 kN·m/deg
Yield Strength (Frame)	≥ 700 MPa	Tensile Test (ISO 6892-1)	550 MPa
Articulation Angle	±18° (no plastic deformation)	Dynamic Load Rig (10k cycles)	±12°

Design Impact: Increased cross-member density and rail thickness reduce frame flex by 22% during 30% grade traverses with 35-ton payloads (per SEA LION Field Test Protocol FT-227).

2.2 Engine Assembly (WP10H371E62)

The 9.5L inline-6 diesel engine undergoes 100% assembly line validation with emphasis on:
– Forged steel crankshaft (hardness: 28-32 HRC) with micro-polished journals
– Piston cooling jets (calibrated flow: 0.8 L/min @ 300 kPa)
– Cylinder head (ductile iron, GGG70L) with 4-valve design and pressure-tested coolant passages (0.5 MPa @ 90°C)
– Turbocharger (Holset HE300WG) with ceramic ball bearing system (validated to 220,000 rpm surge-free)

Critical Tolerances:
– Main bearing clearance: 0.045-0.065 mm (measured via plastigage + CMM)
– Injector nozzle opening pressure: 28.5 ± 0.2 MPa (hydraulic test bench)

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3. PRE-DELIVERY INSPECTION (PDI) PROTOCOL

All units undergo SEA LION PDI Standard SLI-PDI-371 (aligned with SAE J2715):

PDI Stage	Critical Checkpoints	Tool/Method	Pass/Fail Criteria
Chassis	Frame rail straightness (max deviation: 1.5 mm/m)	Laser alignment system	Fail if >1.5 mm/m
	Suspension bushing preload (front: 18±2 kN)	Hydraulic load cell	Fail if outside tolerance
	Fifth wheel mounting bolt torque (720±15 N·m)	Digital torque wrench	Fail if deviation >2%
Engine	Oil consumption rate (max: 0.8% of fuel used)	Gravimetric analysis (1hr run)	Fail if >0.8%
	Turbocharger shaft play (<0.15 mm axial)	Dial indicator	Fail if >0.15 mm
	EGR cooler pressure test (0.4 MPa @ 60°C, 10 min)	Leak detection system	Zero leakage tolerance
Dynamometer	Power output @ 1,900 rpm (min: 368 hp)	AVL PUMA dyno	Fail if <368 hp
	Torque @ 1,200 rpm (min: 1,700 N·m)	AVL PUMA dyno	Fail if <1,690 N·m

PDI Duration: 4.2 standard hours per unit (including 1.5-hour hot-run cycle). Units failing >2 critical checkpoints undergo full rework.

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4. DURABILITY VALIDATION DATA

4.1 Chassis Field Performance (3,000-hour test cycle)

• Test Site: SEA LION Durango Proving Ground (70% rough terrain: 15-25 cm rut depth, 30° lateral slopes)
• Payload: 35 tons (110% rated capacity)
• Results:
• Zero frame cracks at 1,500 hours (vs. competitor avg. 950 hours)
• Suspension component wear: <5% dimensional change at 3,000 hours

4.2 Engine Endurance (B10 Life Certification)

• Test Protocol: ISO 1585 (ESC Cycle) + extended 80% load @ 1,800 rpm for 1.2 million km equivalent
• Key Metrics:
• Piston ring wear: 0.018 mm/km (target: <0.025 mm/km)
• Cylinder bore distortion: ≤12 µm at TDC after 1.2M km
• Certified B10 Life: 1.2 million km (no major component replacement)

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5. OPERATIONAL IMPACT FOR FLEET MANAGERS

• Reduced Downtime: Frame design minimizes body misalignment incidents by 37% (per 2025 fleet data from 147 units in Australian iron ore operations).
• Maintenance Cost: Engine oil change interval extended to 800 hours (API CK-4 15W-40) due to optimized piston cooling and filtration (bypass efficiency: 98.5% @ 10µm).
• Warranty Coverage: 24 months/unlimited km on frame; 18 months/300,000 km on engine (excludes abuse per SEA LION Warranty Terms WT-2026).

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END OF REPORT
SEA LION International Engineering Division – Proprietary Data. Unauthorized distribution prohibited.
Revision: 3.1 | Next Review: 01 JULY 2026

Shipping & Logistics Solutions

Industrial Specification Report 2026

Prepared for: Fleet Managers & Construction Companies
Subject: Logistics Solutions for Exporting ‘Dump Truck HOWO 371 Engine’ from China
Issuing Authority: SEA LION International – Heavy Equipment Logistics Division
Date: January 2026

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1. Executive Summary

This report evaluates three primary maritime transport methods—RO-RO (Roll-on/Roll-off), Bulk Cargo, and Flat Rack—for the export of the HOWO 371 Engine, a core component of the Sinotruk HOWO dump truck series, from manufacturing hubs in Jinan, China, to global construction markets. The analysis focuses on cost-efficiency, transit integrity, handling logistics, and corrosion protection, with specific emphasis on wax-based anti-corrosion treatment to mitigate seawater exposure during ocean transport.

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2. Product Specifications: HOWO 371 Engine

Parameter	Specification
Engine Model	WD615.62 / WD615.69 (HOWO 371 HP)
Power Output	371 hp @ 2,200 rpm
Displacement	9.726 L
Weight (Dry)	~850 kg
Dimensions (L×W×H)	1,520 × 980 × 1,150 mm
Application	Off-highway dump trucks, mining, construction
Export Condition	Crated, wax-protected, non-running

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3. Shipping Method Comparison

Criteria	RO-RO (Roll-on/Roll-off)	Bulk Cargo Shipping	Flat Rack Container
Applicability	Low – Engine not self-propelled	Medium – Suitable for loose units	High – Ideal for oversized crates
Loading Mechanism	Roll-on via ramp	Crane/forklift into hold	Forklift onto open platform
Cargo Protection	Moderate – Exposed to salt spray	Low – High humidity & condensation	High – Weatherproof tarp options
Transit Time (China → MENA/Africa)	28–35 days	30–40 days	25–32 days
Port Infrastructure	Requires RO-RO terminal	Standard bulk terminal	Standard container terminal
Handling Risk	High (vibration, impact)	High (stacking, moisture)	Low (secured lashing points)
Cost (USD per unit)	$480 – $580	$320 – $420	$620 – $750
Customs Clearance	Straightforward	Complex (bulk manifests)	Standard container process
Corrosion Exposure Risk	High	Very High	Moderate (with protection)
Best Use Case	Not recommended	Budget-sensitive, non-critical	High-value, corrosion-sensitive

Note: The HOWO 371 Engine is typically crated and not vehicle-mounted for export; hence RO-RO is inefficient and increases handling risks.

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4. Corrosion Protection: Wax Spraying Protocol

Seawater exposure during maritime transit presents a critical risk to ferrous components of diesel engines. SEA LION International mandates electrostatic wax spraying as a standard preservation process for all exported HOWO 371 engines.

4.1 Wax Spraying Specifications

Parameter	Specification
Coating Type	Solvent-based, hydrophobic wax emulsion
Application Method	Electrostatic spray + brush touch-up
Coverage Areas	Cylinder block, valve cover, oil pan, external manifolds
Dry Film Thickness	25–35 µm
Salt Spray Resistance (ASTM B117)	>500 hours no red rust
Removal Process	Biodegradable solvent wash pre-commissioning
Shelf Life (Protected)	12 months in sealed crate

4.2 Integration with Packaging

• Engine is mounted on wooden skid with moisture barrier.
• Vacuum-sealed polyethylene wrapping over wax-coated surfaces.
• Silica gel desiccant packs placed inside crate.
• Crate labeled: “Corrosion-Protected – Do Not Power Wash Before De-waxing”

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5. Recommended Logistics Strategy

For the HOWO 371 Engine, Flat Rack containers are the optimal shipping method due to:

• Superior structural support for heavy, irregularly shaped crates.
• Compatibility with standard container logistics and CSC certification.
• Reduced exposure to condensation and salt-laden air when covered.
• Facilitation of pre-shipment wax preservation and post-arrival inspection.

RO-RO is not advised due to incompatibility with non-rolling cargo and higher risk of mechanical damage.
Bulk Cargo is only viable for large-volume, low-margin shipments where engine refurbishment upon arrival is acceptable.

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6. SEA LION International Handling Standards

All HOWO 371 Engine shipments comply with:

• ISO 1496/3 – Flat Rack Container Specifications
• MIL-STD-2073-1 – Preservation and Packaging Requirements
• IMO CSC 1972 – Safety of Containers
• IATA TI Section 5 – Hazardous Materials (non-applicable, but referenced for handling)

Pre-shipment inspection includes torque verification of mounting bolts, wax adhesion test, and crate integrity check.

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7. Conclusion

For fleet managers and construction firms sourcing HOWO 371 Engines from China, Flat Rack container shipping with industrial wax protection delivers the highest integrity-to-cost ratio. This method ensures operational readiness upon arrival, minimizes field maintenance, and extends engine service life in coastal and high-humidity project sites.

SEA LION International recommends integrating wax preservation and Flat Rack logistics into procurement contracts to ensure long-term equipment reliability.

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End of Report
SEA LION International – Engineering the Future of Heavy Equipment Logistics