Controls Familiarization, Start-Up, Shut-Down, and Machine Travel

Controls Familiarization, Start-Up, Shut-Down, and Machine Travel

Before you ever move a crawler excavator, you must know every control in the cab and what it does. Manufacturers publish an Operator's Manual — often called the OEM manual — that describes each control, its location, and the correct sequence for starting, warming up, and shutting down the machine. Read that manual for your specific model before you climb in. No two excavators are identical, but the principles below apply across the trade.

The Cab Layout

Crawler excavators use two joysticks to control the boom, arm (dipper), bucket, and upper-structure swing. Most North American machines follow the SAE joystick pattern as the factory default:

• Left joystick: left = swing left, right = swing right, forward = arm out (extend), back = arm in (crowd).
• Right joystick: left = bucket dump, right = bucket curl, forward = boom down, back = boom up.

Foot pedals or levers on the floor control machine travel — left pedal for the left track, right pedal for the right track. Pushing both forward moves the machine forward; pulling both back moves it in reverse. Foot travel controls are often paired with hand levers on modern machines.

The safety lever (also called the gate lock or hydraulic lockout lever) disables all hydraulic functions when raised. It must be in the locked position whenever you enter or exit the cab, and any time you are not actively operating the machine.

Pre-Operation Inspection

Always perform a walkaround inspection before starting. Check for:

• Fluid levels: engine oil, hydraulic oil, coolant, fuel.
• Condition of tracks, track rollers, and sprockets.
• Condition of bucket teeth, pins, and attachment hardware.
• Leaks under the machine or around hose connections.
• Backup alarm function and all lights.
• Cab condition — clean windows, functioning seat belt, mirrors adjusted.

Record any defects on a pre-shift inspection form. Do not operate a machine with a known safety defect — tag it out and report it to your supervisor.

Start-Up Sequence

Follow the OEM checklist exactly. A typical sequence:

1. Mount the machine using three points of contact; face the machine.

2. Fasten the seat belt before touching any control.

3. Raise the safety lever to the locked (raised) position.

4. Turn the key to ON — observe that warning lights illuminate, then extinguish as systems self-check.

5. Sound the horn to alert ground personnel; verify the area is clear.

6. Crank the engine. Do not crank longer than the OEM specifies to avoid starter damage.

7. Check the instrument panel: oil pressure, coolant temperature, hydraulic oil temperature, fuel level, and any fault codes.

8. Lower the safety lever to the armed (lowered) position only after the engine is running and you are ready to operate.

Hydraulic Warm-Up

Cold hydraulic oil is thick. Operating at full speed with cold oil can damage pumps and valves. After start-up, run the engine at low idle for the time specified in the OEM manual — typically several minutes — then cycle the boom, arm, and bucket slowly through partial strokes until hydraulic oil temperature reaches the operating range shown on the gauge. Only then is the machine ready for full-range work.

Machine Travel

Before traveling, identify the direction the machine is facing. The travel controls are oriented relative to the sprocket end of the tracks. On most excavators the sprocket (drive) is at the rear. If the sprocket is behind you, pushing the travel levers/pedals forward moves the machine forward (away from the sprocket). If the machine is rotated 180 degrees, travel directions reverse. Always know where your sprockets are before you move.

For straight-line travel:

• Push both travel controls forward at the same rate.
• Keep movements smooth and gradual to avoid track slippage or jerky travel.
• Look in the direction of travel; use a ground spotter when visibility is limited.
• The backup alarm must sound whenever the machine moves in reverse.

For a 90-degree pivot turn:

• Apply pressure to one travel control while holding the other neutral (or applying light opposite pressure for a spot turn).
• A counter-rotation turn uses one track forward and the other in reverse, spinning the machine on its own center — useful in tight spaces.
• Perform all turns at low speed on a practice pad.

Safe Shutdown Sequence

1. Travel to a level, stable surface.

2. Lower all attachments fully to the ground.

3. Move all joysticks and travel controls to neutral.

4. Run the engine at low idle for the cool-down period specified in the OEM manual.

5. Raise the safety lever to the locked position.

6. Turn the key to OFF and remove it.

7. Exit using three points of contact; chock the tracks if the machine will be left unattended on any slope.

Emergency Shutdown

If a hydraulic line fails or another emergency occurs during operation:

1. Do not panic — apply smooth travel controls to bring the machine to a stop.

2. Lower the attachment to the ground immediately.

3. Move all controls to neutral.

4. Raise the safety lever to the locked position.

5. Shut off the engine.

6. Do not exit until all movement has stopped.

7. Report the failure to your supervisor before anyone approaches the machine.

In this lesson's drill, you must complete the emergency shutdown within 30 seconds of the simulated alarm with every energy-isolation step correct.

Safety Reminders

• Wear your full PPE every time you approach or operate the machine.
• Maintain a 360-degree awareness — excavators have significant blind zones.
• Ground personnel must stay in the designated safety zone except when directed by the operator.
• Never operate with a missing or inoperative backup alarm.
• The safety lever is your primary energy-isolation device in the cab — treat it with the same discipline as a lockout/tagout hasp.