Operating an Excavator Is Different From Driving a Vehicle

An excavator is not a car or truck—the controls work nothing like a steering wheel and pedals. Instead, you operate an excavator from a cab using two joysticks (or levers on older models) to move the boom, arm, and bucket independently. Your feet control the tracks that move the machine forward and backward. The seat often rotates 360 degrees, and you'll spend most of your time looking at what the bucket is doing rather than where the machine is going. If you've never sat in one, the learning curve is real, but the basic motions become muscle memory after a few days of practice.

Most excavators weigh between 20 and 80 tons depending on the model. That weight and the way the machine balances means you can tip it over if you swing the boom too far to the side or dig too deep on a slope. Understanding how the machine moves and where its limits are is the difference between a safe day and a dangerous one.

Key Takeaways

  • The right joystick controls the boom and arm; the left joystick controls the bucket and auxiliary functions, though layouts vary by manufacturer.
  • Track pedals or levers move the excavator forward and backward, and you steer by running one track faster than the other.
  • Always check the machine for leaks, damage, and proper hydraulic fluid level before you start it, and never operate an excavator you haven't been trained on.
  • Swing the boom slowly and keep the bucket low when moving to avoid tipping, especially on slopes or uneven ground.
  • Stability depends on the machine's center of gravity—digging on a slope or reaching too far to the side can roll the excavator over.

The Control Layout and What Each Joystick Does

Most modern excavators use two joysticks mounted on the armrests of the seat. The right joystick typically controls the boom (the long arm that extends upward) and the dipper arm (the middle section that bends). Push the joystick forward to lower the boom; pull it back to raise it. Move it left or right to swing the boom side to side. The left joystick controls the bucket and the auxiliary hydraulic circuits. Push it forward to curl the bucket (scoop inward); pull it back to dump the bucket (open it). Move it left or right to rotate the upper structure (called the house) left and right.

Older excavators and some specialty machines use levers instead of joysticks, and the motion is the same—forward, back, left, right—but you pull or push a lever rather than tilting a stick. Some machines let you swap the joystick layout (called ISO or SAE pattern), so always ask which pattern the machine uses before you start. Pressing or holding buttons on the joysticks engages auxiliary functions like blade control, thumb buckets, or grapples.

The track pedals or levers sit at your feet or on the floor beside the seat. These control forward and backward movement. Pressing the right pedal moves the right track; pressing the left pedal moves the left track. To move straight forward, press both equally. To turn, press one pedal harder than the other—the machine will pivot toward the slower track. Some excavators have a single lever that you push forward to go forward and pull back to go backward, with left-right movement steering the tracks.

Pre-Operation Inspection and Starting the Engine

Before you climb into the cab, walk around the machine and look for obvious damage: cracks in the boom, bent tracks, leaking hydraulic fluid (usually bright red or amber), or loose bolts. Check that the bucket teeth are not broken and that the pins holding the arm together are find. Climb up and check the hydraulic fluid level in the reservoir—it should be between the minimum and maximum marks on the sight glass. Low fluid means the machine will not have full power and can overheat.

Sit in the cab and locate the fuel shutoff valve (usually a lever or knob), the engine start button or key, and the throttle control. On older machines, you may need to prime the fuel system by pressing a rubber bulb several times. Set the throttle to idle (usually marked on the control), engage the parking brake if the machine has one, and press the start button. The engine should turn over within a few seconds. Let it idle for 30 seconds to a minute before you move anything. If the engine does not start after three attempts, stop and check for fuel, a dead battery, or a fuel filter clog—do not keep grinding the starter.

Once the engine is running, test the joysticks and pedals with small movements before you begin work. Move the boom up and down, swing the house left and right, and run the tracks forward and backward a few feet. Listen for unusual noises—grinding, squealing, or banging means something is wrong and you should shut down and investigate.

Basic Movements: Digging, Swinging, and Traveling

A typical digging cycle starts with the bucket positioned above the ground. Lower the boom by pushing the right joystick forward until the bucket teeth touch the ground. Then pull the left joystick back to curl the bucket and dig into the material. At the same time, pull the right joystick back to raise the boom as you curl the bucket—this combination (called a "crowd and lift") loads the bucket efficiently. Once the bucket is full, push the left joystick forward to dump the load, or swing the house to move the bucket over a truck or pile.

Swinging the house (rotating the upper part of the machine) is done with the left joystick moved left or right. Swing slowly, especially when the bucket is full or raised high—fast swinging can shift the machine's weight and cause tipping. Always keep the bucket low when you are traveling or swinging; a raised bucket acts like a sail and makes the machine unstable.

To move the excavator across the site, lower the boom to its lowest position, position the bucket close to the ground, and use the track pedals to move forward or backward. Steer by pressing one pedal more than the other. On slopes, always point the machine uphill or downhill—never across the slope—to reduce the risk of rolling over. Move slowly on uneven ground and avoid sudden direction changes.

Stability and Tipping Hazards

An excavator tips over when its center of gravity moves outside the triangle formed by its two tracks. This happens most often when you dig too deep on a slope, swing the boom too far to the side with a full bucket, or reach too far forward. The heavier the bucket load, the easier it is to tip. Always keep the boom centered over the tracks when digging, and avoid digging directly below the machine—if the bucket breaks through into a void, the machine can fall.

Slopes are the biggest hazard. If you are working on a slope, position the machine so the tracks run up and down the slope, not across it. Never dig on the downhill side of the machine; always dig on the uphill side. If the ground is soft or wet, the tracks can slip sideways, and the machine will roll. Test the ground with slow movements before you commit to a dig. If you feel the machine settling or sliding, stop when ready and reposition.

Swinging the boom also affects stability. A full bucket swung to the side shifts the load away from the center of the tracks. Swing slowly and keep the bucket low. Never swing the boom while the machine is moving—stop the tracks first, then swing. If you are working near a cliff, building, or steep drop-off, stay well back from the edge and never reach over it with the boom.

Common Mistakes and How to Avoid Them

New operators often move the joysticks too fast, causing jerky, uncontrolled movements that waste fuel and damage the hydraulic system. Smooth, deliberate movements use less fuel and give you better control. Practice moving the joysticks slowly and learning how much movement produces the speed you need.

Another common mistake is leaving the engine at full throttle while idling between digs. This wastes fuel and heats up the hydraulic fluid. Use idle speed when you are not actively digging, and increase throttle only when you need power. Many modern excavators have an automatic idle feature that reduces engine speed when the joysticks are not being moved.

Overloading the bucket is tempting but dangerous. A bucket that is too heavy can stall the engine, damage the hydraulic pump, or cause tipping. Fill the bucket until it is level with the top edge, not heaped. Loose material like gravel will settle as you move, so a full bucket at the start of the swing may be overloaded by the end.

Finally, never operate an excavator without proper training. Every machine has quirks—different joystick patterns, different throttle response, different hydraulic pressure settings. Spend time with someone who knows the specific machine you are using, and do not assume that experience on one model means you can jump into another without instruction.

Maintenance Tasks You Should Know

Check the hydraulic fluid level every day before you start work. Low fluid causes slow movements, overheating, and pump damage. The fluid should be bright red or amber and clear—if it is dark brown or black, it needs to be changed. Wipe the sight glass clean with a cloth before you check the level; dirt on the glass makes it hard to read.

Inspect the tracks for broken links, bent shoes, or excessive slack. A track that is too loose will slip and wear out quickly; one that is too tight will strain the rollers and cause overheating. Most excavators have a grease fitting on the track tensioner—grease it weekly if you are working in dusty conditions.

Check the engine air filter monthly and replace it if it is clogged with dust. A dirty air filter reduces engine power and increases fuel use. The fuel filter should be replaced annually or whenever you notice the engine hesitating during startup. Keep the cab clean and the windows clear so you can see the bucket and the ground around the machine.

Frequently Asked Questions

What is the difference between a mini excavator and a full-size excavator?

Mini excavators (under 10 tons) are lighter, more maneuverable, and fit in tight spaces like residential yards and narrow trenches. Full-size excavators (20 to 80 tons) have more power and can dig deeper and faster. The controls work the same way, but a mini excavator is more sensitive to overloading and tipping because it has less weight to balance a heavy bucket.

Can I operate an excavator without formal training?

You should not. Operating an untrained excavator is dangerous to you and anyone nearby. Most construction sites require proof of training or certification before you can operate heavy equipment. Even if no one is checking, the risk of tipping, hitting underground utilities, or damaging the machine is high. Ask your employer or equipment rental company for training before you start.

How do I know if the hydraulic system is failing?

Signs include slow or jerky movements, leaking fluid under the machine, a burning smell from the engine area, or the engine stalling when you try to dig. Stop the machine when ready and check the fluid level and look for leaks. Do not operate the excavator until the problem is fixed—running a damaged hydraulic system can cause a complete failure and leave you stranded or injured.

What should I do if the excavator starts to tip?

Stop moving when ready and do not jump out. Shut off the engine and stay in the cab—it is the safest place. Call for help and wait for a recovery crew. If the machine does tip, stay inside with your seatbelt on until rescue arrives. Jumping out during a tip can result in serious injury or death.

How long does it take to become proficient at operating an excavator?

Basic competency—moving the machine, digging a straight trench, and loading a truck—takes about one to two weeks of daily practice. Becoming truly skilled at precision digging, working on slopes, and operating in tight spaces takes several months. Every operator continues to learn new techniques and problem-solve on different job sites throughout their career.