Used Sany 155Excavator

Reading: 31

🏗️ Overview

The SANY SY155 is a 15-ton class (mid-size) hydraulic excavator manufactured by SANY Group, one of the world's largest construction machinery manufacturers. It is designed for versatile use in construction, mining, road building, landscaping, and municipal engineering projects. It sits between the smaller SY135 and larger SY205 in SANY's excavator lineup.

📊 Key Specifications

Parameter	Specification
Model	SY155 / SY155C (C = Compact Swing)
Operating Weight	~14,800 – 15,500 kg
Engine Model	Isuzu AJ-4HK1X (or Yanmar alternative)
Engine Power	~88 – 90 kW (≈120 HP)
Rated Speed	2,000 rpm
Bucket Capacity	0.5 – 0.7 m³ (standard)
Max Digging Depth	~5,800 – 6,000 mm
Max Digging Reach	~8,700 – 9,100 mm
Max Dumping Height	~6,500 – 7,000 mm
Max Digging Force	~105 – 110 kN
Hydraulic System	Load-sensing, variable displacement pump
Fuel Tank Capacity	~300 L
Track Width	600 mm (steel shoes)
Travel Speed	~3.5 – 5.0 km/h

Note: Specs may vary slightly by market/region and model variant (SY155 vs SY155C vs SY155H)

🔧 Engine & Powertrain

Feature	Detail
Engine Brand	Isuzu AJ-4HK1X (Tier 4 Final / Stage V emission)
Type	4-cylinder, turbocharged, intercooled diesel
Displacement	5.2 L
Emission Standard	EPA Tier 4 / EU Stage V (depending on region)
Fuel Efficiency	Optimized for low fuel consumption (~12–15 L/hr under load)
Cooling System	Water-cooled with auto-reversing fan

The engine is known for being reliable, fuel-efficient, and easy to maintain, which is a hallmark of SANY's design philosophy.

💧 Hydraulic System

Feature	Detail
Pump Type	Variable displacement, load-sensing axial piston pump
System Pressure	~34.3 MPa (343 bar)
Flow Rate	~2 × 180 L/min (main + swing)
Control	Electronic proportional control (EPC)
Attachment Circuit	1–2 auxiliary lines (for breaker, grapple, thumb)

The load-sensing hydraulic system automatically adjusts flow and pressure based on workload, improving fuel efficiency by 10–15% compared to conventional systems.

🏠 Operator Cab & Comfort

Feature	Detail
Cab Type	ROPS/FOPS certified, fully enclosed
Air Conditioning	Standard with dust filter
Seat	Suspension seat with armrest, adjustable
Display	LCD multi-function monitor (engine info, fault codes, fuel, hours)
Noise Level	~73 dB(A) — relatively quiet for its class
Vibration	Low vibration design with rubber mounts
Controls	Joystick with fingertip controls, auto-idle function
Safety	Rearview camera, work light, alarm

SANY has invested heavily in operator comfort, making long working hours more bearable.

🚜 Undercarriage & Structure

Feature	Detail
Track Frame	High-strength steel, box-section
Track Shoes	600 mm wide steel shoes (replaceable)
Rollers	5 per side (upper + lower)
Sprocket	Rear-mounted, segmented for easy replacement
Ground Clearance	~430 mm
Boom/Arm	High-strength steel, optimized for digging force

The X-frame undercarriage provides excellent stability during heavy digging operations.

🔄 Model Variants

Variant	Description
SY155	Standard tail swing — best for open-area work
SY155C	Compact swing (zero tail swing) — ideal for urban/tight spaces
SY155H	High-dump version — extended reach & dump height for loading trucks
SY155 PRO	Upgraded version with improved hydraulics & smart features

🛠️ Available Attachments

The SY155 is highly versatile with quick-coupler compatibility:

Attachment	Use Case
🪨 Hydraulic Breaker (Hammer)	Rock breaking, demolition
🪓 Hydraulic Thumb	Grappling, log handling
🥄 Grading Bucket	Leveling, finishing
🪣 Clean-up Bucket (Narrow)	Trench work, pipe laying
🌿 Ripper (Single Shank)	Hard ground, frozen soil
🔧 Hydraulic Shear	Demolition, scrap metal
🪵 Grapple	Log/material handling

✅ Advantages (Why Choose SY155?)

Advantage	Explanation
💰 Cost-Effective	Lower purchase price vs. Komatsu/CAT — great ROI
⛽ Fuel Efficient	Load-sensing hydraulics + efficient engine
🔧 Easy Maintenance	Ground-level service points, widely available parts
📱 Smart Features	Telematics-ready (SANY Cloud), remote diagnostics
🌐 Global Service Network	SANY has 500+ service centers worldwide
🏗️ Reliable	Proven in harsh conditions (mining, high altitude)
📈 Strong Resale Value	Growing brand recognition globally

🆚 Comparison with Competitors

Feature	SANY SY155	Komatsu PC150	CAT 315	Doosan DX150
Power	~120 HP	~110 HP	~124 HP	~121 HP
Weight	~15,000 kg	~15,200 kg	~15,800 kg	~14,800 kg
Price	⭐⭐⭐⭐⭐ (Best)	⭐⭐⭐	⭐⭐	⭐⭐⭐⭐
Fuel Efficiency	⭐⭐⭐⭐⭐	⭐⭐⭐⭐	⭐⭐⭐	⭐⭐⭐⭐
Parts Availability	⭐⭐⭐⭐	⭐⭐⭐⭐⭐	⭐⭐⭐⭐⭐	⭐⭐⭐⭐

SANY wins on price-to-performance ratio, while Komatsu/CAT lead in brand legacy and resale in some markets.

🌍 Markets & Applications

Application	Details
🏗️ Construction	Foundation excavation, trenching
🛣️ Road Building	Grading, pipe laying
& Mining	Quarry, small-scale mining
🏙️ Urban Work	SY155C for tight spaces, utility work
🌿 Landscaping	Grading, pond digging, tree planting
🏚️ Demolition	With hydraulic breaker/shear

Popular in: China, Southeast Asia, Africa, Middle East, South America, Eastern Europe, Australia

📋 Summary


Class	15-Ton Mid-Size Excavator
Best For	Versatile construction, mining, urban work
Strengths	Affordable, fuel-efficient, comfortable, reliable
Ideal Buyer	Contractors seeking best value for money without sacrificing quality
Warranty	Typically 2 years / 2,000 hours (varies by region)

🏆 Bottom Line: The SANY SY155 is one of the best value-for-money 15-ton excavators on the market today. It combines modern technology, operator comfort, fuel efficiency, and SANY's rapidly growing global service network — making it a strong competitor to established brands like Komatsu, CAT, and Doosan.

Would you like more details on any specific aspect — such as pricing, maintenance schedule, or comparison with a specific model? 😊