Best Used Excavators for Quarry Work

Best Used Excavators for Quarry Work

Quarry work is one of the toughest applications for an excavator. Machines must handle hard rock, heavy digging, loading, and sometimes hydraulic breakers for long working hours.

For this reason, choosing the right used excavator is important. A good quarry excavator should have strong digging force, a durable undercarriage, reliable hydraulics, and enough operating weight for heavy-duty work.

In this guide, we will look at some of the best used excavators for quarry work and explain what to check before buying.

What Makes an Excavator Good for Quarry Work?

Quarry conditions are much harder than normal construction jobs. Excavators often work on rocks, uneven ground, and steep surfaces.

When choosing a used excavator for quarry work, consider these factors:

• Strong digging and breakout force
• Heavy-duty hydraulic system
• Durable undercarriage
• Strong boom and arm
• Reliable engine
• Good cooling system
• Suitable operating weight
• Good compatibility with hydraulic breakers
• Easy maintenance and access to spare parts

A heavier excavator is usually better for large quarry operations because it provides greater stability and digging power.

1. Caterpillar 330 Series

The Caterpillar 330 is one of the most popular choices for heavy-duty excavation and quarry work.

Used Cat 330 excavators are available in different generations, including the 330B, 330C, 330D and newer models. Older models can be attractive to buyers looking for a lower purchase price and simple maintenance.

The Cat 330 has good digging performance and is suitable for removing hard soil, loading trucks, and working with hydraulic breakers.

For buyers in Africa and other developing markets, the availability of Caterpillar parts and experienced mechanics is another important advantage.

2. Caterpillar 336 Series

If you need more power than a 330-class excavator, the Cat 336 is an excellent option.

The Cat 336 is a larger excavator designed for heavy excavation, quarrying, mining-related work, and large construction projects.

Its larger operating weight provides good stability when digging hard rock. It can also work with heavy hydraulic breakers when properly configured.

A well-maintained used Cat 336 can be a good investment for quarries that require high production and long working hours.

3. Caterpillar 349 Series

For very demanding quarry work, the Cat 349 is another strong choice.

This is a large excavator with high digging power and excellent stability. It is suitable for large rock excavation, heavy-duty digging, and loading large trucks.

However, buyers should remember that larger excavators normally have higher fuel consumption and maintenance costs.

For a small or medium quarry, a Cat 330 or 336 may provide a better balance between productivity and operating cost.

4. Komatsu PC300 and PC360 Series

Komatsu PC300 and PC360 excavators are also popular choices for quarry applications.

These machines offer strong digging performance and are suitable for heavy excavation and rock handling. The PC360, in particular, provides a good combination of operating weight, power, and productivity.

Used Komatsu excavators are popular in many international markets because of their durability and relatively straightforward maintenance.

When buying a used PC300 or PC360 for quarry work, pay close attention to the hydraulic system, final drives, swing motor, boom, arm, and undercarriage.

5. Komatsu PC400 Series

For larger quarry operations, the Komatsu PC400 is worth considering.

The PC400 is a heavy excavator designed for demanding excavation and material handling. Its large operating weight gives it good stability when working on hard ground.

It can also be equipped with suitable heavy-duty attachments for specific quarry applications.

Because of its size, however, transportation costs and fuel consumption should be included when calculating the total operating cost.

6. Hitachi ZX330 and ZX350 Series

Hitachi ZX330 and ZX350 excavators are another good option for quarry work.

Hitachi excavators are known for their hydraulic performance and smooth operation. A properly maintained ZX330 or ZX350 can handle demanding digging jobs and rock excavation.

They are particularly suitable for buyers who want a reliable Japanese used excavator with good working performance.

Before purchasing a used Hitachi excavator, inspect the hydraulic pump, main control valve, travel motors, swing system, and undercarriage carefully.

7. Hyundai 330 Series

Hyundai 330-class excavators can also be a practical choice for quarry work.

One of their main advantages is that used Hyundai excavators are often available at competitive prices compared with similar-size machines from Caterpillar or Komatsu.

For buyers with a limited budget, a well-maintained Hyundai 330 can provide good working capacity without the higher purchase price of some premium brands.

However, spare parts availability should be checked before purchasing, especially if the machine will be used in a remote quarry.

Which Excavator Size Is Best for a Quarry?

The best excavator size depends on the quarry’s production requirements.

20–22 ton excavators: Suitable for smaller quarries, general excavation, and light-to-medium rock work.

30–36 ton excavators: A good choice for medium and large quarries. They offer a strong balance between digging power, fuel consumption, and transport costs.

40 ton and larger excavators: Better suited to large quarries with high production requirements and heavy rock excavation.

For many buyers, a 30–36 ton used excavator is a practical middle ground.

Should You Buy a Used Excavator With a Hydraulic Breaker?

If the excavator will frequently break hard rock, a hydraulic breaker can significantly improve productivity.

However, working with a breaker places additional stress on the excavator’s hydraulic system, boom, arm, and structure.

When buying a used excavator that has been used with a hydraulic breaker, inspect:

• Boom and arm cracks
• Hydraulic hoses
• Main hydraulic pump
• Control valve
• Hydraulic cylinder seals
• Bucket linkage
• Pins and bushings
• Upper frame
• Undercarriage

A machine that has spent years breaking rock may show more wear than a similar machine used mainly for normal digging.

Check the Undercarriage Carefully

The undercarriage is one of the most important parts of a quarry excavator.

Rocky ground can cause significant wear to tracks, rollers, idlers, sprockets, and track chains.

Before buying a used excavator, check the remaining undercarriage condition. If the undercarriage is badly worn, replacement can be expensive.

A machine with a good engine and hydraulic system but a severely worn undercarriage may not actually be a good deal.

Check the Engine and Hydraulic System

The engine and hydraulic system are critical for quarry productivity.

Check for:

• Excessive engine smoke
• Oil or coolant leaks
• Abnormal engine noise
• Hydraulic oil leaks
• Slow hydraulic movements
• Weak digging force
• Abnormal hydraulic pump noise
• High engine temperature

It is better to inspect the excavator while it is cold and then test it after it reaches normal operating temperature.

Don’t Choose Only by the Lowest Price

A cheap used excavator is not always the cheapest excavator to operate.

For quarry work, a machine with serious hydraulic problems, a worn undercarriage, or structural damage can require expensive repairs after purchase.

Instead of looking only at the purchase price, consider the machine’s overall condition, maintenance history, working hours, spare parts availability, and expected repair costs.

A reasonable profit for a reliable supplier is also important. Suppliers need enough margin to provide proper inspection, preparation, and after-sales support. An extremely low price can sometimes indicate hidden problems or misleading information.

Final Thoughts

The best used excavators for quarry work are usually machines that combine strong digging power, durable construction, reliable hydraulics, and good parts availability.

For medium-sized quarry operations, models such as the Caterpillar 330, Caterpillar 336, Komatsu PC300, Komatsu PC360, Hitachi ZX330, and Hyundai 330 can be practical choices.

For larger and more demanding quarries, the Caterpillar 349 and Komatsu PC400 can provide greater production capacity.

Most importantly, don’t choose a used excavator based only on its brand or price. Carefully inspect the engine, hydraulic system, undercarriage, boom, arm, and overall structure before making a purchase.

A properly inspected and well-maintained used excavator can provide many years of productive quarry work while costing significantly less than a new machine.