Well Maintained Used Cat 320b Hydraulic Excavator Durable 20ton Mining Digger
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Product Highlights
- Classic 20-ton CAT medium excavator, worldwide hot selling model, ideal for construction, road work, trenching and land clearing.
- Equipped with original CAT 3066 engine, fuel efficient, stable output, low failure rate and long service lifespan.
- Reinforced boom, arm and heavy undercarriage, solid steel structure, wear-resistant for long daily heavy workload.
- Mature hydraulic system with smooth response, easy to control, flexible movement, perfect for normal and narrow job sites.
- Affordable price, spare parts easy to find globally, low maintenance cost and excellent resale value.
Product Attributes
- Customization
- Available
- Brand
- Caterpillar
- Engine Power
- 74~146kw
- Model NO.
- 320B
- Load and Unload Method
- Breakbulk Vessel
- Operating Weight
- 20ton
- Transmission
- Hydraulic Transmission
- Type
- Universal Type
- Walking Mode
- Crawler
- Application
- Wetland Construction, River Dredging, Swamp Work
- Condition
- Original Condition
- Working Hours
- 0-2000
- Emission Standard
- Tier 3
- Fuel Tank Capacity
- 340 L
- Engine Model
- Cat 3066
- Transport Package
- Bulk
- Specification
- 9, 440 × 2, 800 × 2, 940 mm
- Trademark
- famous brand
- Origin
- China
Product Images of Well Maintained Used Cat 320b Hydraulic Excavator Durable 20ton Mining Digger
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Product Description
2.Roadwork: Land leveling, ditch digging, material handling
3.Mining: Quarrying, ore extraction, loading & haul road maintenance
4.Agriculture: Land clearing, irrigation channel digging, farm development
5.Forestry: Log handling, land preparation, site clearing
Hydraulic System: Precision-controlled pumps and valves for smooth operation
Undercarriage: Reinforced steel tracks with adjustable tension
Cab: Ergonomic ROPS/FOPS-certified cabin with air conditioning
Arm & Bucket: Multiple size options (standard, long-reach, heavy-duty)
Control System: Intelligent monitoring panel with fault diagnostics


Low ground pressure design for stable operation on soft or uneven terrain
Heavy-duty reinforced frame for long service life in harsh environments
Fuel-efficient powertrain with extended maintenance intervals
Smooth, responsive hydraulics for precise digging and grading accuracy



Model | CAT 320C | CAT 320D | CAT 320GC |
Operating Weight (kg) | 19,800 | 20,000 | 20,500 |
Engine Power (kW) | 103 | 103 | 109 |
Bucket Capacity (m³) | 0.8–1.2 | 1.0 | 0.9–1.3 |
Max Digging Depth (mm) | 6,600 | 6,700 | 6,750 |
Max Reach (mm) | 9,700 | 9,800 | 9,900 |
Fuel Tank Capacity (L) | 400 | 410 | 430 |



We specialize in authentic equipment from top manufacturers including Caterpillar Doosan Hitachi and Hyundai Our portfolio covers core construction machinery such as excavators bulldozers road rollers and crawler cranes all meeting strict original factory quality standards to support diverse scenarios ranging from urban construction and mining development to road building and port logistics
Backed by a team of seasoned experts well versed in construction machinery and international trade we offer personalized one on one consulting services in multiple languages including English Spanish and Arabic Our professionals boast deep product knowledge and rich export experience ensuring precise alignment with your project requirements
Guided by the principle of quality first we enforce rigorous full process quality control and provide complete certification With competitive pricing from direct brand partnerships and flexible pricing strategies we strive to be your reliable global partner powering the growth of the construction industry worldwide

Free Parts Replacement: Free replacement of non-artificial damage parts within the warranty period.
Tool Kit Included: Standard maintenance tool kit provided with every order for easy on-site repairs.
Global Spare Parts Supply: Access to original spare parts with fast delivery worldwide.
Technical Support: Online guidance and remote troubleshooting available.


A: All used construction machinery undergoes a comprehensive inspection before shipment. The inspection covers key components (engine, hydraulic system, traveling system), exterior wear level, operating conditions and other critical indicators.
A:We provide a basic warranty of 3-6 months for used construction machinery. The specific warranty period is determined by the equipment model, service life and inspection condition. The warranty covers the repair of non-human-induced failures of core components such as engines, hydraulic pumps and main valves. Wear parts (such as filters, track shoes and bucket teeth) are not covered under the warranty.
A: Yes, we can provide customized refurbishment services. According to your needs, the refurbishment content can include:
Exterior Refurbishment: Whole-machine painting, cab cleaning and restoration, logo replacement;
Component Upgrade: Replacement of severely worn-out parts, hydraulic system seals and aging circuit components;
Function Debugging: Adjustment of equipment parameters (such as digging force and traveling speed) according to the working scenario.
A:T/T : 50% deposit in advance, and the remaining 50% paid against the copy of bill of lading after the equipment is shipped;
L/C: Negotiable against documents such as commercial invoice, bill of lading and inspection report issued by us;
A: Basic Trade Documents: Commercial invoice, packing list, ocean bill of lading, trade contract;
Compliance Certification Documents: Certificate of origin, equipment inspection report, import registration certificate for used mechanical and electrical products (required by some countries);
Customs Clearance Supporting Documents: Equipment operation manual, maintenance records, brand authorization certificate (if applicable).
About the Supplier
This supplier has been audited by BV. Verify the report on the official BV website with ID "MIC-ASR254897". Items marked "" are certified.
Company Profile
Union Construction Machinery Co., Ltd is a top professional Equipments Basket Supplier, in particular Construction & Engineering Machinery. We belong to UNION Group, whose business line covers Ocean Shipping, Logistics, Vessel Management, Investment and International Trade.
Union Construction Machinery Co., Ltd has become a integrated enterprise not only specialized in R&D, but also good at machine manufacturing, maintenance service, parts supporting. The company is based in the center of Chinese economy city-Shanghai, It has import and export rights and has cooperated with famous construction machines home and abroad for a long time. Union Construction Machinery Co., Ltd has been devoting itself to supporting the cost-effective machines to China and other countries.
Quick delivery time for customers, Booking shipping space is made way in advance, Prompt reaction for spare parts, all these has earned a good reputation for us for being a trustworthy partner because we believe in understanding our clients, open communication, effective planning as well as preparation and is committed to executing and delivering our promises.
The factories of Union Construction Machinery Co., Ltd. Are in Shandong and Jiangsu province, main products are crawler crane, truck crane, excavator, wheel loader, dump truck, oil tank and other construction machines. It has been in this industry more than 20 years with professional experience and could provide the best solution and service for the customer.
Choosing Union Construction Machinery Co., Ltd. is selecting the reliable partner. Welcome the clients from all over the world to visit and cooperate with us.
About Our Factory & Business Background
- Address
- Room 223, Building 4a Zone, No. 439 Jinglian Road, Shanghai, China
-
Terms of Payment
- LC, T/T
-
International Commercial Terms(Incoterms)
- FOB, CIF
-
Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays -
Nearest Port
- Shanghai Port
-
Minimum Order Quantity
- 1 set
-
Supply Chain Partners
- 20
Our Production Capability & Technical Expertise
- Main Products
- Crawler Crane, Truck Crane, Wheel Loader, Excavator, Construction Machinery, Bulldozer, Road Roller, Motor Grader, Truck, Construction
-
QA/QC inspectors
- 1 people
-
Inspection Type for Finished Products
- 100% inspection(Visual inspection & Function inspection)
-
Inspection Method for Finished Products
- Finished product checked by packing staff
-
Customization Options
- Customization from Samples
-
ODM Service Available
- Yes
-
R&D Engineers
- 1 people
-
Traceability of Raw Materials
- Yes
Our Industry Experience & Global Business Record
-
Export Year
- 13 Years
-
Main Markets
- Europe, Southeast Asia/ Mideast
-
Number of Foreign Trading Staff
- 6
-
Overseas Agent/Branch
- No
-
New Products Launched in Last year
- No
FAQ
- Are the used construction machines inspected before shipment?
- All used construction machinery undergoes a comprehensive inspection before shipment. The inspection covers key components (engine, hydraulic system, traveling system), exterior wear level, operating conditions and other critical indicators.
- What is the warranty period for used construction machinery?
- We provide a basic warranty of 3-6 months for used construction machinery. The specific warranty period is determined by the equipment model, service life and inspection condition. The warranty covers the repair of non-human-induced failures of core components such as engines, hydraulic pumps and main valves. Wear parts (such as filters, track shoes and bucket teeth) are not covered under the warranty.
- Can you provide customized refurbishment services for used construction machinery?
- Yes, we can provide customized refurbishment services. According to your needs, the refurbishment content can include: Exterior Refurbishment: Whole-machine painting, cab cleaning and restoration, logo replacement; Component Upgrade: Replacement of severely worn-out parts, hydraulic system seals and aging circuit components; Function Debugging: Adjustment of equipment parameters (such as digging force and traveling speed) according to the working scenario.
- What payment terms do you accept for used construction machinery exports?
- T/T : 50% deposit in advance, and the remaining 50% paid against the copy of bill of lading after the equipment is shipped; L/C: Negotiable against documents such as commercial invoice, bill of lading and inspection report issued by us;
- What documents are required for importing used construction machinery?
- Basic Trade Documents: Commercial invoice, packing list, ocean bill of lading, trade contract; Compliance Certification Documents: Certificate of origin, equipment inspection report, import registration certificate for used mechanical and electrical products (required by some countries); Customs Clearance Supporting Documents: Equipment operation manual, maintenance records, brand authorization certificate (if applicable).
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