Used Caterpillar 329D2 Excavator

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CATERPILLAR 329D2 Crawler Excavator Detailed Introduction

The Caterpillar 329D2 is a 29-ton class heavy-duty crawler excavator developed and produced by Caterpillar Inc., the global leader in construction equipment manufacturing. As an upgraded iteration of the classic 329D series, it balances high productivity, fuel efficiency, extreme durability and low operating cost, making it one of the most popular medium-to-large excavator models in global construction, mining, quarrying and forestry sectors.

1. Core Specifications

Parameter	Detail
Operating Weight	28,100 – 31,500 kg (varies by track configuration, bucket size and attachment setup)
Bucket Capacity Range	1.4 – 1.87 m³ (standard general-purpose bucket: 1.6 m³; optional heavy-duty rock bucket available)
Maximum Digging Radius	10,620 mm
Maximum Digging Depth	7,240 mm
Maximum Digging Height	10,140 mm
Maximum Dumping Height	7,080 mm
Tail Swing Radius	3,220 mm
Travel Speed (High/Low)	5.5 km/h / 3.5 km/h
Gradeability	35° (70%)
Swing Speed	10 rpm

2. Power System

The 329D2 is equipped with a Caterpillar proprietary C7.1 ACERT 6-cylinder inline, turbocharged, air-to-air aftercooled diesel engine:

Net rated power: 152 kW (204 hp) at 2000 rpm, meeting Tier 3/Stage IIIA equivalent non-road emission standards
High-pressure common rail fuel system paired with Caterpillar ACERT combustion optimization technology, reducing fuel consumption by 5-8% compared to the previous 329D model under the same operating conditions
Adaptive engine control module (ECM) that dynamically matches power output with hydraulic system demand, minimizing unnecessary energy loss
Large 520L fuel tank, supporting 10-12 hours of continuous operation on a single refuel, suitable for long-time field construction
Optional cold-start kit (engine preheater, hydraulic oil preheater) for operation in -30℃ extreme low temperature environments.

3. Hydraulic System

It adopts Caterpillar's mature load-sensing hydraulic system, delivering precise control and high operating efficiency:

Main pump maximum flow: 2 × 213 L/min, main relief pressure: 35 MPa, providing strong breakout force (bucket breakout force up to 178 kN, stick breakout force up to 130 kN) for hard rock and heavy earthmoving conditions
Hydraulic confluence function enables simultaneous, smooth movement of boom, stick and swing, shortening single working cycle time by 10% compared to similar products
High-precision 10μm return oil filtration system, effectively extending service life of hydraulic pumps, valves and cylinders
Standard auxiliary hydraulic pipeline interface, supporting direct connection of attachments including hydraulic breakers, grapples, hydraulic shears and rippers without additional modification.

4. Structural Durability

The 329D2 is designed for long service life under extreme heavy-load conditions:

High-strength steel welded mainframe, upper carriage and undercarriage, passing 10,000 hours of accelerated fatigue test under overload conditions
Reinforced boom and stick with thickened wear plates at stress concentration points, adapted for long-term quarry and mining operations
Sealed and lubricated track chain, support rollers and idlers, reducing wear and extending undercarriage service life by 20% compared to non-sealed designs; optional wide track or wetland track for soft ground operation
Large-diameter high-load slewing bearing, with stable load bearing performance even under partial load and impact conditions.

5. Operator Comfort & Safety

The cab is certified with ROPS (Roll-Over Protective Structure) and FOPS (Falling Object Protective Structure) standards, ensuring operator safety in rollover and falling object accidents
Fully sealed and sound-insulated cab, with internal operating noise as low as 74 dB(A), far lower than industry average
Fully adjustable air-suspension seat with lumbar support, paired with automatic climate control system, reducing operator fatigue during long shifts
Light-force pilot control joysticks with reasonable stroke, delivering precise operation response
High-definition LCD monitor displays real-time operating data including fuel consumption, oil temperature, fault codes, and supports optional rearview camera for 360° operating vision.

6. Maintenance & Operational Cost Control

All daily maintenance points (oil filter, fuel filter, air filter, liquid level check ports) are arranged at ground-accessible positions, no need to climb onto the upper carriage for routine maintenance
Dual-stage air filtration system, effectively adapting to high-dust construction sites, with filter replacement cycle up to 1000 hours
Engine oil change interval: 500 working hours, hydraulic oil change interval: 5000 working hours (with Caterpillar original hydraulic oil), greatly reducing scheduled downtime
Standard Caterpillar Product Link™ remote monitoring system, supporting real-time tracking of equipment location, operating hours, fuel consumption and fault warning, enabling efficient fleet management and predictive maintenance.

7. Typical Applications

The 329D2 is widely used in:

Infrastructure construction: earth excavation, foundation construction for highways, railways, bridges and tunnels
Quarry and mining: ore stripping, loading, hard rock breaking operations
Water conservancy projects: river dredging, dam construction
Urban demolition: building demolition with hydraulic breaker, construction waste removal
Forestry and port operations: timber handling, bulk cargo loading and unloading.

With Caterpillar's global dealer service network, sufficient spare parts supply and high residual value of second-hand equipment, the 329D2 has a very competitive total lifecycle cost for users.

Non flooded

No accident

Original product

Used Caterpillar 329D2 Excavator

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