Whether you're building roads, digging foundations, or handling heavy materials, excavators play a critical role. To keep them running smoothly, knowing the different parts of an excavator is essential.

In this guide, we’ll explore the core systems and parts excavator owners need to know, highlight popular brands like Hitachi, Takeuchi, Volvo, and Caterpillar (Cat), and explain how to find the best excavator for parts.

Understanding the Main Parts of an Excavator

Excavators have multiple systems that work together for performance and efficiency. Here are the main parts of an excavator:

Boom: It’s the part that gives the excavator its extended reach.

Stick (or Dipper Arm): Attached to the boom, it allows for digging and extending deeper into the ground.

Bucket: Used for digging, trenching, and lifting materials.

Cab: Where the operator sits and controls the machine.

Undercarriage: Tracks are often replaced due to wear.

Engine: Usually a diesel-powered unit that supports hydraulic and mechanical systems.

Hydraulic System: Requires regular maintenance to prevent leaks and breakdowns.

Swing Drive: Allows the excavator to rotate 360 degrees.

Counterweight: Balances the machine during operation.

Each of these components can wear out or become damaged with time, requiring replacement. That’s when contractors look for excavator for parts options to keep their machines running.

Benefits of Purchasing Excavators for Parts

An excavator for parts can supply hard-to-find or discontinued components.

Benefits of using excavators for parts:

Save money by using salvaged components.

Environmentally friendly by recycling old machinery.

Ideal for discontinued or rare models.

Useful when operating multiple machines of the same brand.

Many construction companies buy excavators for parts to maintain their fleet without overspending.

Best-Selling Excavator Parts by Brand

Hitachi Excavator Parts

Hitachi machines are favored for their advanced hydraulics and precision.

Common Hitachi excavator parts include:

Hydraulic pumps and valves

Track chains and rollers

Final drives

Swing motors

Boom and stick cylinders

Using high-quality Hitachi parts ensures optimal performance and longevity.

Takeuchi Excavator Parts

Takeuchi specializes in compact excavators and mini diggers.

Popular Takeuchi excavator parts:

Rubber tracks

Drive sprockets

Air filters

Control valves

Swing bearings

Takeuchi machines are popular on urban job sites, so parts need to be compact and precise.

Volvo Excavator Parts

Volvo excavators are renowned for comfort, fuel efficiency, and durability.

Typical Volvo excavator parts:

Engine components

Fuel systems

Cab interiors and operator controls

Hydraulic oil filters

Attachments and buckets

Volvo’s reputation means parts can sometimes be more expensive, but many quality aftermarket suppliers are available.

CAT Excavator Parts / Caterpillar Excavator Parts

Caterpillar, or CAT, is a leader in heavy machinery worldwide.

High-demand Cat excavator parts include:

Undercarriage assemblies

Swing gearboxes

Turbochargers

Pins and bushings

Electrical components

If you’re using Caterpillar machines, ensure you stick with trusted vendors to avoid copyright parts.

Finding the Right Parts Excavator Dealers and Sellers

Whether you’re buying online or locally, follow these tips to get reliable excavator parts.

Tips for buying parts excavator owners need:

Always verify the model and serial number before buying.

Ask for warranties or return policies on used parts.

Visual checks can reveal wear or defects.

OEM (original equipment manufacturer) parts guarantee fit, while aftermarket may be cheaper.

Build a relationship with reputable suppliers.

Common platforms to find excavator for parts:

Online marketplaces (eBay, MachineryTrader)

Construction equipment auctions

Heavy machinery salvage yards

Manufacturer-certified dealers

Local and international part resellers

Keep Your Excavator Running Longer

Avoid unnecessary wear with good operating practices.

Best practices:

Check hoses, tracks, and cylinders every shift.

Lubricate all moving joints regularly.

Change filters and fluids according to schedule.

Store equipment properly when not in use.

Train operators to use machines efficiently.

Final Thoughts

Whether you're buying a full excavator for parts or just replacing a bucket or valve, sourcing the right component matters.

If you're in the market for excavator parts, be strategic: parts of excavator compare brands, check compatibility, and maintain your machine regularly.

Choose wisely and keep your construction projects moving without delays.