Yes, there is a throttle.
The throttle is not a pedal, but a throttle knob or lever. This is because excavators typically use a fully hydraulic control system. This system doesn't require constant engine speed adjustments; the hydraulic pump automatically adjusts its flow rate based on pressure changes within the hydraulic system. Furthermore, the opening of the control lever also adjusts the flow rate. Therefore, when the engine is stable at a certain speed, the excavator's speed is actually determined by the pump control system and the lever's opening.
On an excavator, the throttle knob (lever) is like the main switch next to the water gauge, while the pump control system and lever opening are like the faucet. The wider the throttle is opened, the greater the overall flow rate within the hydraulic system, resulting in a wider speed range for the excavator and faster individual movements.
