he CAT 320GC crawler excavator is Caterpillar’s cost-effective 20-ton medium-duty excavator, specially designed for light-to-medium construction workloads including municipal road renovation, residential foundation excavation, pipeline trenching, landscaping, farmland water conservancy and small stockyard loadingCat. This CAT 320GC crawler excavator is equipped with proprietary Cat C4.4 four-cylinder turbocharged engine, matching integrated DOC+DPF aftertreatment system without DEF urea tank, eliminating urea filling, pipeline clogging and downtime regeneration failures to maximize machine attendance rate. Optimized electro-hydraulic system combines low engine speed and large-displacement main pump, cutting fuel consumption by up to 20% compared with older G-series models, while synchronized extended maintenance intervals reduce total maintenance cost by 20%. All core load-bearing components adopt high-strength wear-resistant steel with finite element reinforced boom & arm and stable widened X-type track chassis, delivering consistent durability for long-shift daily operation. The new-generation ROPS/FOPS certified touchscreen intelligent cab and ground-level centralized service layout drastically lower operator fatigue and daily inspection labor, making CAT 320GC crawler excavator the top choice for global rental fleets, municipal contractors and small-to-medium construction companies pursuing low hourly operation cost.
Full Official Technical Parameters of CAT 320GC Crawler Excavator
Basic Overall Dimension & Weight of CAT 320GC Crawler Excavator
- Model: CAT 320GC Low-Cost Medium-Duty Crawler Excavator
- Operating Weight: 20600kg (20.6 ton, standard reach boom + 2.9m arm)Cat
- Standard HD Bucket Capacity: 1.0m³ general earth bucket, optional 0.85m³ narrow trenching bucket / 1.1m³ bulk loading bucket
- Standard Boom Length: 5700mm Reach Boom
- Standard Arm Length: 2900mm
- Overall Transport Total Length: 9680mm
- Overall Transport Total Width: 2980mm
- Overall Cab Top Height: 3010mm
- Track Gauge: 2380mm widened stable track base
- Standard Track Shoe Width: 600mm triple-grouser wear-resistant steel track shoe
- Minimum Ground Clearance: 445mm
- Rear Tail Swing Radius: 2910mm compact design
- Ground Pressure: 47.8kPa
- Fuel Tank Volume: 345L large capacity for all-day continuous workCat
- DEF Tank: None (urea-free aftertreatment design)
- Hydraulic Oil Tank Volume: 115L
- Full System Hydraulic Oil Volume: 234L, service life up to 2000 working hours
Travel & Swing Performance
- Two-speed Travel Speed: Low gear 3.1km/h, High gear 5.4km/h, auto two-speed shift
- Slew Rotation Speed: 11.3rpm
- Maximum Climbing Gradient: 35° (70%)
- Maximum Drawbar Traction Force: 208kN
- Maximum Swing Torque: 74.4kN·m for fast bulk truck loadingCat
- Travel System: Full hydraulic auto-shift dual-speed travel motor with built-in mechanical parking brake, 7 bottom track rollers + 2 top carrier rollers per side for stable flat ground & mild muddy site operation
- Slew System: Reinforced heavy-duty roller slewing bearing + independent large-displacement slew motor, built-in holding brake for precision grading and pipeline trenching
- Optional Configuration: Front floating dozer blade for small-site leveling work
ISO Standard Digging Working Range & Digging Force
- Max Horizontal Digging Radius: 9560mm
- Max Ground Digging Radius: 9370mm
- Max Digging Depth: 6630mm standard deep digging capacityCat
- Max Vertical Digging Depth: 5940mm
- Max Digging Height: 9680mm
- Max Material Dumping Height: 6740mm
- Minimum Front Swing Radius: 3180mm
- Max Bucket Digging Force (ISO): 142kN
- Max Arm Digging Force (ISO): 108kN
- Standard Factory Configuration: Pre-plumbed auxiliary hydraulic piping for hydraulic breaker hammer
Cat C4.4 Urea-Free Power Engine System
The CAT 320GC crawler excavator adopts original Caterpillar C4.4 turbocharged industrial diesel engine, fully compliant with China National Stage IV, US EPA Tier 4 Final and EU Stage V global emission standards, urea-free integrated DOC+DPF aftertreatment without SCR DEF tankCat. You can check full engine official data via Caterpillar official construction machinery website.
- Engine Model: Cat® C4.4 Water-cooled 4-cylinder inline turbocharged diesel engine
- Net Power – ISO 9249: 109.1kW / 146HP @ 2200rpmCat
- Gross Power – ISO 14396: 110kW / 148HP
- Bore × Stroke: 105mm × 127mm
- Displacement: 4.4L
- Emission Standard: China Stage IV / Tier4 Final / Stage V (DOC+DPF integrated, no DEF required)
- Core Advantages: Silent automatic DPF regeneration without construction interruption; extended 500-hour filter maintenance interval; supports B20 biodiesel; stable cold start at -25°C; 52°C high-temperature environment adaptive cooling system; electric fuel priming pump for easy daily maintenance.
Caterpillar Optimized Electro-Hydraulic System
- Main Pump Configuration: Dual large-displacement variable displacement piston main pumps
- Total Main Pump Max Output Flow: 429 L/min combined flow
- Max System Working Pressure – Equipment: 35000 kPa
- Max Travel Circuit Pressure: 34300 kPa
- Max Slew Circuit Pressure: 25000 kPa
- Pilot Control Pressure: 3.5MPa
- Control Logic: Intelligent electro-hydraulic load sensing control, boom & arm regeneration circuit to recycle hydraulic energy, drift reduction valve to avoid boom/arm sinking; three-function joysticks with shortcut buttons for breaker operation; low idle auto fuel-saving logic cuts idle fuel waste
- Multi Working Modes: Standard / Eco / Power / Hammer, one-touch switch matching light landscaping, general earthmoving and rock breaking scenarios
- Auxiliary Hydraulic Circuit: Factory pre-installed multi-function breaker piping, compatible with hydraulic rock hammer, earth auger, thumb grab and hydraulic quick hitch coupler
- Hydraulic Oil Replacement Cycle: Extended to 2000 working hours
Chassis & Reinforced Working Attachment
Crawler Chassis Frame
- Integral thickened mountain-shaped X-type anti-torsion frame, full penetration robot welding technology, impact-resistant structure for municipal rocky sites
- 7 bottom track rollers + 2 top carrier rollers per side, fully sealed long-lubrication track pins, thick quenched steel track shoes with anti-slip pattern, long service life under muddy farmland and urban demolition sites
- Optional front floating dozer blade with floating leveling function for small construction yard flatting
Boom & Arm Working Device
- Boom, arm and bucket base adopt high-strength low-alloy wear-resistant steel plate, all stress joint positions thickened with buffer anti-shock heavy bushings
- Optimized finite element box-type boom & arm structure, balanced weight and anti-deformation performance for long-hour loading operation
- Bucket cutting edge adopts HB400 wear-resistant steel, higher soil filling efficiency and lower daily abrasion loss
Cab, Electronic Control & Safety Configuration
- Cab Type: Fully enclosed positive pressure dustproof & noise reduction ROPS/FOPS dual certified anti-falling & anti-roll safety cab
- Standard Interior Equipment
- 10-inch upgraded touch intelligent color monitor, grid-style app layout, color-coded fault notifications, built-in QR code machine tutorial, real-time display fuel consumption, engine status, DPF regeneration and working mode switching, support custom startup password & one-touch engine start
- Multi-adjustable suspension shock absorption seat with heating function, flip left armrest to widen boarding space
- Ergonomic ISO standard pilot control joysticks with three shortcut buttons, USB fast charging port, Bluetooth audio playback
- Large panoramic laminated safety glass, full surrounding sunshade, factory standard rearview camera
- Optional Upgrades: Full automatic constant temperature heating & cooling air conditioner, 360° panoramic surround camera, multi-group high-bright LED night working lights
- Internal Operating Noise: ≤76dB
- Safety Design: Ground-level engine emergency shutoff switch, lockable power disconnect switch, overload sound-light alarm, hydraulic safety lock handle, anti-roll reinforced cab frame; all daily maintenance service points set at ground height without climbing steps
Standard Factory Equipment & Optional Matching Attachments
Standard Configuration
1.0m³ general earth bucket, pre-plumbed auxiliary breaker hydraulic piping, 600mm steel track shoes, ROPS/FOPS touchscreen intelligent safety cab, four-mode electro-hydraulic load sensing control system, auto idle fuel-saving system, factory rearview camera, electric fuel priming pump
Optional Attachments
Front floating dozer blade, rubber track pad, 0.85/1.1m³ narrow/bulk bucket, hydraulic rock breaker, earth auger, log thumb grab, hydraulic quick hitch coupler, 360° panoramic surround view camera, full automatic cab heating & cooling air conditioner
Six Core Competitive Advantages of CAT 320GC Crawler Excavator
1. Urea-Free Cat C4.4 Stage IV Power, Zero DEF Operation Cost
Equipped with original Caterpillar C4.4 turbo engine adopting DOC+DPF integrated aftertreatment without SCR urea tank, the CAT 320GC crawler excavator completely eliminates urea purchase, filling and pipeline blockage fault troubles. Silent automatic DPF regeneration runs during normal digging without stopping construction, maximizing daily machine attendance rate; extended synchronized maintenance intervals cut overall maintenance cost by up to 20% vs conventional 20-ton excavators, perfectly matching long-term rental fleet low-operation-cost demand.
2. Optimized Electro-Hydraulic System, 20% Lower Fuel Consumption
The proprietary Cat intelligent load-sensing electro-hydraulic system matches low engine speed and large-displacement dual main pumps, plus boom/arm energy regeneration circuit to recycle overflow hydraulic energy, cutting hourly fuel consumption by maximum 20% compared with old G-series models. Four adjustable working modes freely switch between light landscaping and medium rock breaking, auto idle logic reduces fuel waste during waiting loading, greatly lifting profit margin for construction contractors.
3. Balanced 20Ton Medium Layout, Multi-Scenario General Construction Adaptability
With moderate 2980mm overall width and compact 2910mm tail swing radius, CAT 320GC balances the narrow-site passability of 14-ton excavators and the high loading efficiency of 22-ton heavy machines. It can flexibly operate in narrow urban residential construction yards and complete medium-volume municipal subgrade earthmoving tasks without frequent bucket replacement, covering pipeline trenching, landscaping, foundation excavation and small demolition multi-industry scenarios.
4. Caterpillar Original Reinforced Structural Parts, Long Service Life For Daily Heavy Shifts
The integral mountain-shaped X-frame chassis, finite element optimized box boom & arm and multi-roller stable track system of CAT 320GC are fully upgraded for light-medium municipal and farmland working conditions. Full penetration anti-impact robot welding structure effectively resists mud abrasion and small rock impact, extending whole machine service cycle and reducing wearing part replacement frequency. Original Cat hydraulic cylinders and wear-resistant bucket edge guarantee consistent durability over thousands of working hours.
5. ROPS/FOPS Certified Large Touchscreen Cab, All-Day Low-Fatigue Operator Experience
The fully sealed positive pressure cab passes international ROPS anti-roll and FOPS anti-falling dual safety certification, effectively isolating urban construction dust and engine running noise. Upgraded 10-inch grid touch monitor simplifies function navigation without blocking rear camera view, automotive-grade suspension heating seat and ergonomic pilot joysticks relieve operator fatigue during continuous 8–10 hour construction shifts. Factory standard rearview camera eliminates rear blind zone for safer narrow-site operation.
6. Ground-Level Centralized Maintenance Layout, Easy Daily Inspection & Service
All engine oil, hydraulic oil, fuel filters, DPF inspection ports and routine maintenance components of CAT 320GC are concentrated on side ground-level service points, operators complete oil replacement and fault inspection without climbing ladders. Standard electric fuel priming pump removes manual oil pumping trouble; synchronized extended service intervals reduce maintenance frequency, cutting daily inspection labor time by 40% and shortening machine downtime.
Wide Application Scope
The CAT 320GC crawler excavator is widely used for municipal road reconstruction, underground pipeline trenching, commercial & residential foundation excavation, landscaping greening, farmland irrigation channel digging, small stockyard loading, rural road renovation and light demolition construction projects. If you need compact 14-ton medium digger for ultra-narrow community courtyard work, check our XCMG XE155GA Crawler Excavator. For heavy-duty 22-ton high-output excavator for large highway subgrade and light quarry loading projects, view the XCMG XE215GA Crawler Excavator product page.
The CAT 320GC crawler excavator is a cost-effective 20-ton medium general construction digger equipped with original urea-free Cat C4.4 Stage IV low-fuel turbo engine and Caterpillar optimized intelligent electro-hydraulic system. Featuring 20% lower fuel & maintenance cost, multi-scenario adjustable working modes, dual ROPS/FOPS safety touchscreen cab and ground-level easy maintenance layout, this CAT 320GC crawler excavator is the most reliable low-hour-cost medium construction machinery for global municipal, residential, landscaping and equipment rental engineering customers.
