Lift device with lateral stability system

A lift device, comprising:

• a chassis;
• a tractive element coupled to the chassis;
• a driver coupled to the chassis and configured to drive the tractive element to propel the lift device;
• a boom assembly coupled to the chassis;
• an actuator configured to move at least a portion of the boom assembly relative to the chassis;
• a roll angle sensor coupled to the chassis and configured to provide sensor data indicating a roll angle of the chassis;
• a boom angle sensor configured to measure a boom angle between the boom assembly and the chassis;
• and
• a controller operatively coupled to the roll angle sensor and the boom angle sensor, wherein the controller is configured to:
• determine whether the roll angle of the chassis exceeds a threshold roll angle;
• determine whether the boom angle exceeds a threshold boom angle;
• and
• in response to a determination that the roll angle of the chassis exceeds the threshold roll angle while the boom angle exceeds the threshold boom angle, at least one of (a) activate an alarm, (b) limit operation of the actuator, or (c) limit operation of the driver.

A telehandler, comprising:

• a chassis;
• an axle pivotably coupled to the chassis;
• a tractive element rotatably coupled to the axle;
• a stability cylinder coupled to the axle and the chassis, the stability cylinder having a first chamber and a second chamber;
• a boom assembly coupled to the chassis;
• an actuator configured to move at least a portion of the boom assembly relative to the chassis;
• and
• a valve assembly fluidly coupled to the first chamber and the second chamber, the valve assembly including a first valve and a second valve,
• wherein in an open configuration of the valve assembly, a flow path is defined from the first chamber, through the first valve, through the second valve, and to the second chamber;
• and
• wherein in a locked configuration of the valve assembly, the first valve fluidly decouples the first chamber from the second chamber, such that the stability cylinder limits movement of the axle relative to the chassis.