Leveling system for lift device

A chassis for a lift device, the chassis comprising:

• a base having a first end and an opposing second end;
• a first arm pivotably coupled to the first end of the base, the first arm configured to support a first tractive element;
• a second arm pivotably coupled to the first end of the base, the second arm configured to support a second tractive element;
• a third arm pivotably coupled to the opposing second end of the base, the third arm configured to support a third tractive element;
• a fourth arm pivotably coupled to the opposing second end of the base, the fourth arm configured to support a fourth tractive element
• a first pivot actuator extending between the first end of the base and the first arm;
• a second pivot actuator extending between the first end of the base and the second arm;
• a third pivot actuator extending between the opposing second end of the base and the third arm;
• a fourth pivot actuator extending between the opposing second end of the base and the fourth arm;
• and
• a fluid circuit configured to facilitate selectively fluidly coupling the first pivot actuator, the second pivot actuator, the third pivot actuator, and the fourth pivot actuator in a plurality of different configurations where, in each of the plurality of different configurations, two of the first pivot actuator, the second pivot actuator, the third pivot actuator, and the fourth pivot actuator are fluidly coupled together while the other two of the first pivot actuator, the second pivot actuator, the third pivot actuator, and the fourth pivot actuator are fluidly decoupled.

A chassis for a lift device, the chassis comprising:

• a base having a first end and an opposing second end;
• a first arm pivotably coupled to the first end of the base, the first arm configured to support a first tractive element;
• a second arm pivotably coupled to the first end of the base, the second arm configured to support a second tractive element;
• a third arm pivotably coupled to the opposing second end of the base, the third arm configured to support a third tractive element;
• a fourth arm pivotably coupled to the opposing second end of the base, the fourth arm configured to support a fourth tractive element
• a first pivot actuator extending between the first end of the base and the first arm;
• a second pivot actuator extending between the first end of the base and the second arm;
• a third pivot actuator extending between the opposing second end of the base and the third arm;
• a fourth pivot actuator extending between the opposing second end of the base and the fourth arm;
• and
• a control system configured to:
• control the first pivot actuator, the second pivot actuator, the third pivot actuator, and the fourth pivot actuator through a range of motion to attempt to maintain the chassis level;
• and
• drive each of the first pivot actuator, the second pivot actuator, the third pivot actuator, and the fourth pivot actuator toward a mid-stroke position while continuing to attempt to maintain the chassis level.

A chassis for a lift device, the chassis comprising:

• a base having a first end and an opposing second end;
• a first arm pivotably coupled to the first end of the base, the first arm configured to support a first tractive element;
• a second arm pivotably coupled to the first end of the base, the second arm configured to support a second tractive element;
• a third arm pivotably coupled to the opposing second end of the base, the third arm configured to support a third tractive element;
• a fourth arm pivotably coupled to the opposing second end of the base, the fourth arm configured to support a fourth tractive element
• a first pivot actuator extending between the first end of the base and the first arm;
• a second pivot actuator extending between the first end of the base and the second arm;
• a third pivot actuator extending between the opposing second end of the base and the third arm;
• a fourth pivot actuator extending between the opposing second end of the base and the fourth arm;
• and
• a control system configured to control the first pivot actuator, the second pivot actuator, the third pivot actuator, and the fourth pivot actuator such that the first arm, the second arm, the third arm, and the fourth arm extend away from the base (i) at an upward sloping angle relative to a horizontal when the chassis is in a first mode and (ii) at a downward sloping angle relative to the horizontal when the chassis is in a second mode.