In the used excavator market, the Doosan 150 crawler excavator and the Doosan 150 wheeled excavator are also among the best-selling models. When purchasing equipment, many buyers not only focus on excavation performance, but also care about shift income, maintenance costs, and flexible project scheduling capabilities. Both models are in the 15-ton class and have similar excavation capabilities, but there are also huge differences. This article compares the two devices from multiple dimensions including model introduction, applicable working conditions, performance characteristics, operation and maintenance costs, and key points for second-hand purchase, to help buyers choose based on project needs. Hefei Yingju  Machinery Co.,Ltd has sufficient supply and standardized equipment testing, making it a reliable channel for purchasing such used machines.

I. Machine positioning and used machinery market stock
Used Doosan 150 crawler excavator: Positioned as a general-purpose earthmoving machine, it has a huge market share in the domestic engineering market and active cross-regional circulation. The equipment on the market spans a wide range of years, from the old DH series to the new generation of DX models, which are constantly in circulation. Used machine suppliers have sufficient inventory, and buyers have more machines to choose from. Most of them are used in earthmoving, foundation pit, and river engineering projects. The working conditions of the machines are diverse, including pure earthmoving high-quality machines and long-term crushing heavy-duty machines.

Used Doosan 150 wheeled excavator: It is positioned as a municipal-specific model. The market circulation is slow and it is mainly concentrated in the hands of municipal and urban engineering practitioners. The price of high-quality second-hand mobile phones with good condition and no major accidents is higher. Most wheel excavators are used in urban pavement operations for a long time, and are rarely used in mines and mud sites for a long time.

II. Suitable working environment
Doosan 150 crawler excavator is good at non-hardened and weak-bearing field construction sites: deep foundation pit excavation, river beach dredging, mountain leveling, gravel pits, and small quarrying supporting operations. The crawler track has low ground pressure, making it less likely for the vehicle to get stuck in muddy and soft soil sites, and provides greater stability when operating on steep slopes. Shortcomings: The crawler tracks will scratch the asphalt and cement roads, and it must be transported on a flatbed trailer when transferring to the construction site, so it cannot be driven directly on the road.

The Doosan 150 wheeled excavator is mainly used for urban scattered projects on hardened paved roads: municipal rainwater and sewage pipe networks, road maintenance, sidewalk reconstruction, community greening excavation, and urban emergency repairs. Rubber tires will not damage the road surface and can be used for short-distance transitions on urban roads. Shortcomings: Tires are prone to slipping on soft ground and muddy ground; sharp gravel can cut the tire, so it is not suitable for long-term mining and heavy earthmoving operations.

III. Comparison of Maintenance Costs
Crawler-type Doosan 150 Excavator:

1. The primary maintenance concern is the undercarriage (rollers, idlers, sprockets, and tracks); once these components are severely worn, replacement costs are high.

2. Technicians are generally familiar with this model, making the maintenance of the engine and hydraulic components straightforward, and spare parts are readily available on the market.

3. Moving the machine between job sites requires the additional expense of a flatbed trailer.

Wheeled-type Doosan 150 Excavator:

1. Key consumables include tires, brake pads, steering oil seals, and seals for the outriggers (stabilizers).

2. While tire replacement is costly, major undercarriage components require replacement less frequently than those on a crawler-type machine.

3. No trailer is needed for short-distance relocations, saving on frequent transportation costs.

IV. Key Inspection Points for Used Equipment
Used Doosan 150 Crawler Excavator: Focus the inspection on the crawler undercarriage and the hydraulic excavation system.
1. Check the wear on the undercarriage components (rollers, idlers, sprockets, and tracks).

2. Inspect the hydraulic pump and control valve for internal oil leakage.

3. Check the engine for signs of burning oil or excessive exhaust emissions.

4. Examine the welds on the boom and arm for cracks or signs of previous repair welding.

Used Doosan 150 Wheeled Excavator: It is necessary to inspect both the hydraulic excavation system and the automotive-style chassis/undercarriage.

1. In addition to the core excavator components, check the outrigger cylinders for leaks, and inspect the transmission, braking system, and tires.

2. Maintenance and troubleshooting for wheeled excavators are more complex than for crawler models; pay special attention to the axles and the frame for any signs of deformation.

V. Suitable Operational Models
Crawler Excavator Operational Model: Best suited for long-term deployment at a single large-scale job site, handling projects with high earthwork volumes, such as foundation pit excavation or river dredging, which typically involve large scopes of work and long durations. These projects offer high total volume and stable revenue. Drawbacks: High transportation costs when moving the machine after project completion; during idle periods, the equipment sits unused, and the logistics of scheduling transport can tie up capital. This model is ideal for operators who consistently secure large-scale infrastructure or earthwork contracts.

Wheeled excavator business model: Well-suited for handling multiple small, scattered projects. These machines can move between 2–3 job sites in a single day, making them ideal for short-term, small-scale tasks such as utility pipeline work, road repairs, or residential area renovations. This offers great operational flexibility and minimizes downtime between projects. The trade-offs: the volume of earthwork per project is relatively small, and there can be significant fluctuations in workload between peak and off-peak seasons. This model is best suited for operators focusing on small-scale municipal contracts or equipment rental services.

Conclusion
From an investment and operational perspective, if your business primarily involves large-scale, long-term earthwork projects —where the goal is to secure stable, high-value contracts—a used Doosan 150 crawler excavator is the better choice. Conversely, if your core business consists of smaller, short-term municipal projects that require frequent travel between various job sites, a used Doosan 150 wheeled excavator is the superior option. When purchasing used machinery, do not rely solely on outward appearance; conduct a thorough inspection of components prone to wear and tear. Hefei Yingju  Machinery maintains a large inventory of in-stock equipment. Every machine undergoes a pre-inspection to identify potential faults, allowing customers to visit the site, examine the equipment in person, and accurately assess its true condition.