Coach Bus
Daewoo & Daewoo-type
OEM-Grade Parts · Global Supply · 20+ Years Expertise
Doosan Engine Parts Supplier
Hengjing supplies verified OEM-grade components for Doosan (Develon) diesel engines, Daewoo passenger buses, and TATA commercial trucks — serving aftermarket distributors and assembly-line operators across 30+ countries with consistent quality and a 48-hour quotation guarantee.
20+
Years in Business
30+
Countries Served
7000+
Products SKUs
1500㎡
Warehouse Area
Trusted by companies like
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Product Categories
What Doosan parts do we manufacture?
From small parts like oil pressure sensors to the entire DP222LC engine, Doosan engines represent our most comprehensive and proudest product line. Of course, our product range is virtually complete, covering chassis components, drivetrain parts, and filters. As long as you provide the model number or a photo, we can supply what you need.
Doosan Engine Parts
Our flagship category. We supply verified OEM-grade engine components for Doosan (Develon) diesel engines, ensuring peak performance and minimal downtime.
Cylinder blocks & Heads
Timing gear cases
Flywheel & Housings
Camshaft assemblies
Fuel injection pumps
Gasket overhaul sets
Transmission System Parts
High-reliability transmission components engineered for heavy-duty commercial operations. We cover gearboxes, clutch systems, and driveline essentials.
Gearbox assemblies
Complete clutch kits
Synchronizer rings
Torque converters
PTO units
Transmission filters
Chassis Parts
Robust chassis and undercarriage components including suspension systems, axles, steering linkages, and air brake systems for commercial safety.
Suspension systems
Axle shafts & hubs
Steering hydraulic pumps
Air brake calipers & pads
Shock absorbers
Leaf springs
Filters Series
Complete filtration solutions designed to protect your heavy machinery from contaminants and maximize overall equipment lifespan.
Air filter elements
Engine oil filters
Diesel fuel filters
Cabin air filters
Hydraulic filters
Transmission filters
Exterior Accessories
High-quality exterior body parts, cabin components, and styling accessories designed for structural integrity and vehicle aesthetics.
Headlights & Taillights
Cab mirrors & Brackets
Front bumpers & Grilles
Wiper motor assemblies
Safety windshields
Door hardware & Handles
Truck Parts
Dedicated parts catalog for commercial and heavy-duty trucks, including TATA equivalents. Supplying fleets with reliable mechanical components.
TATA Equivalent parts
Fifth wheel components
Trailer landing gears
Air compressor units
Heavy-duty brake drums
Drive shafts
Excavator Parts
Heavy-duty replacement parts specifically engineered for Doosan/Develon and other major excavator brands operating in harsh environments.
Main hydraulic pumps
Swing & Travel motors
Track rollers & Idlers
Boom & Arm cylinders
Bucket teeth & Pins
Main control valves
Packaging Options
About Product Packaging
We offer a wide range of product packaging options, including Develon-branded packaging, Doosan-branded packaging, Hengjing’s own custom packaging, and unbranded packaging. Everything is tailored to your needs. If you meet a certain purchase volume, we can also provide you with unique, customized packaging. Please feel free to contact us at any time.
Send an Inquiry
Application Areas
Doosan Parts for Every Application
Doosan engines are used in a wide range of applications. Whether you’re a user or maintenance technician for buses, excavators, generator sets, or trucks, you’ll always find what you need here to get your equipment running efficiently again.
Brand Portfolio
HENG JING supplies high-quality
components to these brands
Hengjing company offers parts from a variety of brands. Whether you are a dealer or end user of Doosan, Daewoo, Develon, or TATA, Hengjing is your reliable and dependable supplier of choice.
TATA
Truck Parts
Comprehensive parts coverage for TATA commercial trucks — from LCV to heavy long-haul vehicles. Engine, chassis, and body components available.
2,000+
SKUs in Stock
Explore TATA Parts
Doosan
Develon Engine Parts
Full-spectrum Doosan / Develon engine component coverage — excavator powertrains, industrial engines, and genset applications across all horsepower classes.
3,500+
SKUs in Stock
Explore Doosan Parts
Daewoo
Bus Parts
Specialist inventory for Daewoo passenger bus models — BH, BX, and GDW platforms. Body, engine, and chassis components with confirmed fitment data.
1,800+
SKUs in Stock
Explore Daewoo Parts
Why Hengjing
Why You Can Trust Heng Jing
Two decades of specialist knowledge in diesel engines and commercial vehicle components translate directly into supply-chain reliability your operations can depend on.
20+ Years Technical Authority
Since the early 2000s, our founder has specialized exclusively in bus and engine components. That depth of knowledge eliminates guesswork from every order.
OEM-Spec Precision
Each component is verified against OEM dimensional and performance standards before dispatch. ISO-certified processes, 100% inspection protocols.
Rapid fulfillment
A well-organized, 1,500+ square-meter facility enables rapid pick-and-ship for high-velocity inventory, drastically reducing your lead times.
48-Hour Quotation SLA
Submit a parts inquiry and receive an engineering-backed, detailed quotation within 48 hours — even for complex, multi-line OEM kitting projects.
Export-Ready Logistics
Export-ready infrastructure serving 30+ countries. Multi-modal shipping with full customs documentation support for seamless cross-border delivery.
Minimum Order Quantity
Whether you require a single replacement part to restore your equipment to normal operation, or a large-volume shipment to replenish the inventory at your regional distribution center, Hengjing is here to assist you. We accept orders starting from a single unit and offer discounted rates for bulk purchases.
Services & Support
End-to-End
Supply Partnership
Hengjing delivers more than parts — we provide a complete supply infrastructure that reduces procurement complexity and keeps your operations moving.
OEM Custom Manufacturing & Kitting
Private-label packaging, custom bundle kits, and OEM-spec component sourcing. We configure supply to match your assembly line's exact requirements.
Dedicated After-Sales Support
Named customer specialists assigned to each account. Warranty claims, fitment queries, and order issues are resolved swiftly by people who know your vehicles.
Global Supply Chain Management
Multi-modal freight coordination, export documentation, and customs compliance support for seamless delivery to 30+ countries.
Fast Delivery from Bonded Inventory
1,500+ sqm warehouse with high-velocity stocked lines. Urgent orders can ship same-day; standard orders within 3–5 business days for most destinations.
1,500㎡
Bonded Warehouse
Engine Model Coverage
Select the appropriate engine parts
based on your equipment model.
Hengjing maintains active stock and sourcing networks for the following Doosan and Daewoo engine series. If your model is not listed, contact us — our catalog of 7,000+ SKUs covers most variants.
| Application | Engine Models | Typical Equipment |
|---|---|---|
| Coach Bus Engines | BH115, BH117, BX212, GDW6122 and other Daewoo coach bus platforms | |
| Excavator Engines | Doosan DX140, DX225, DX300, DX380 and other Develon excavator models | |
| Generator Set Engines | Standby and prime power gensets from 50 kVA to 2,000 kVA | |
| Truck & Marine Engines | TATA commercial truck equivalent parts and Doosan marine propulsion engines |
Can't find your engine model?
Send us your engine serial number or OEM part number — our team will confirm availability within 48 hours.
Quality & Certifications
Quality Assurance & Certifications
Hengjing's supplier qualification process and in-house inspection protocols are aligned with international OEM standards. Every part leaves our facility with documented traceability.
20+
Years Operating
Founded in the early 2000s, with continuous investment in supplier qualification and quality processes since day one.
7,000+
Active SKUs
A deep, living catalog covering engine, chassis, electrical, and body parts across three major brands.
30+
Export Markets
Active customers in Southeast Asia, South Asia, the Middle East, Africa, and Latin America.
Customer Reviews
Hear what other customers
have to say about us.
★★★★★
"Hengjing has been our go-to supplier for Doosan excavator engine parts for three years. Lead times are consistently short, parts fit perfectly first time, and their team responds within hours. Highly recommended for serious fleet operators."
Raj Kumar
Fleet Procurement Manager · Construction Group, India
★★★★★
"We operate 120 Daewoo buses across three cities. Finding a reliable parts supplier used to be our biggest operational headache. Hengjing solved that. Their parts catalog depth and delivery reliability is unmatched in our region."
Ahmed Hassan
Technical Director · Urban Transit Authority, Egypt
★★★★★
"The turbocharger rebuild kit we ordered for our genset Doosan engine arrived faster than expected, perfectly packed, and with full part number documentation. After-sales support from Frank was excellent — professional and technically sharp."
Jorge Lima
Maintenance Engineer · Power Generation Co., Brazil
Company Credibility
Your Ideas Matter to Us.
So Does Quality.
At Hengjing, diesel engine part is more than a commodity — it's a commitment to uptime for your fleet and profitability for your business. When you partner with us, we treat your procurement challenges as our own, from first inquiry to post-delivery follow-up.
Our founder, Jiang Zhaohui, established this company in the early 2000s with a single core objective: to provide high-quality bus parts. More than two decades later, Hengjing has grown from a small 30-square-meter shop to a company with a 200-square-meter office and a warehouse spanning over 1,500 square meters. Yet our original mission—to provide high-quality bus parts and foster mutually beneficial partnerships with our customers. Our quality control process is by no means a reactive measure—it is integrated into every stage of the process, from supplier qualification reviews to final inspection and export packaging.
GET A QUOTE
Case Studies
Customer Success
in the Field
Real-world examples of how Hengjing's parts and expertise have reduced downtime, cut procurement costs, and solved complex sourcing challenges for operators worldwide.
Daewoo Bus
120-Bus Fleet Overhaul — Egypt Transit Authority
Supplied complete engine gasket sets, water pump assemblies, and brake component packages for a large urban transit operator. Consolidated multi-brand sourcing into a single, managed supply relationship.
Doosan Excavator
Doosan DX Excavator Engine Supply — India
Long-term parts supply agreement for a major construction group operating 60+ Doosan-powered excavators. Established a stocked consignment arrangement to eliminate machine-down wait times.
TATA Truck
TATA Fleet Maintenance Program — UAE Logistics
Annual parts supply contract for a 200-vehicle TATA commercial truck fleet. Includes brake systems, drivetrain components, and engine consumables with quarterly shipment scheduling.
Generator Set
Genset Engine Rebuild Program — Brazil Power Co.
Supplied full overhaul component packages for 15 Doosan-powered standby generators. Turbocharger kits, piston sets, and complete gasket overhaul kits, all verified against OEM part numbers.
FAQ
Frequently Asked Questions About Heavy Equipment Parts Sourcing
Clear answers to the most common questions from global OEM procurement teams and aftermarket operators.
Don't see your question here? Submit your inquiry using the form — a specialist will respond within 24 hours.
Hengjing supplies a curated mix of genuine OEM parts sourced from authorized channels and premium aftermarket alternatives manufactured to OEM dimensional specifications. Every part listing clearly indicates its origin, and we provide full part number cross-reference documentation on request.
We guarantee a detailed, itemized quotation within 48 hours of receiving your inquiry — including part availability, unit pricing, and estimated lead times. For stocked items, quotes are often delivered within hours. Complex multi-line OEM kitting projects may require slightly more time for thorough verification.
Our catalog covers the following engine series across four application categories:
- Coach Bus: DE08TIS, DE12TIS, DV15TIS, DB58, DB33, P086TI, P126TI, P158LE, P222LE — powering Daewoo BH, BX, and GDW platforms
- Excavator: DL06, DL06S, DL08, DL08S, DV11, DV15T, D18, D24, D34 — covering Doosan DX140 through DX380 and Develon models
- Generator Set: GE08TI, GE12TI, L126TI, V158TI, V180TI, V222TI, DP222LC — from 50 kVA to 2,000 kVA standby and prime power applications
- Truck & Marine: DE08TIS, DE12TIS, DV15TIS, DL06, DV11 — for TATA commercial trucks and Doosan marine propulsion engines
For specific serial numbers or part number cross-references, contact our team directly and we will confirm fitment and availability within 48 hours.
MOQs vary by product line. For high-volume consumable parts like filters and gaskets, MOQs may apply; for assembly-level components, single-unit orders are often available. We work flexibly with both small independent workshops and large fleet procurement departments to find the right supply arrangement.
All parts are inspected against OEM dimensional and performance standards before dispatch. We provide a standard 12-month warranty against manufacturing defects on stocked components. Our ISO 9001-aligned quality management process ensures consistent, verifiable quality across every shipment.
Yes. Hengjing has extensive experience exporting to 30+ countries. We prepare complete commercial invoices, packing lists, certificates of origin, and HS code documentation. For markets with specific import requirements, our team will coordinate with your customs broker to ensure smooth clearance.
Yes. We provide OEM-style private-label packaging for distributors and fleet operators who require parts under their own brand or specification. This service is available for qualifying order volumes. Please contact our team to discuss your requirements and minimum quantities.
Request a Quote
Send your part numbers, engine model or requirements. Our team will reply within 48 hours.