22 Safety PrecautionsThe UC4+ Spray Height Control system will greatly improve your spraying height accuracy andprotect the boom against damage in a wide variety of field conditions. However, under somecircumstances performance may be limited. The operator of the sprayer must remain alert atall times and override the automatic control when necessary.CAUTIONUnder no circumstances should any service work be performed on the machinerywhile the UC4+ Spray Height Control system is in the automatic mode.Always ensure that the UC4+ Spray Height Control system is powered down or inmanual mode: Before leaving the operator’s seat. While the machine is not moving. When transporting the machine.Before working on any part of the booms: Set the UC4+ system to manual mode. Turn the sprayer engine off.Do not operate this system before: Reading and understanding the operator’s manual. Thoroughly understanding the machine operation.