Final answer:
The specific degree of vehicle tilt at which the Tilt Warning Alarm initiates for the HIAB 8108-2 crane cannot be determined without the actual TM 9-2320-423-10 manual, but tilt alarms in such equipment are designed to alert operators before reaching unsafe conditions.
Step-by-step explanation:
According to the TM 9-2320-423-10 manual, the Tilt Warning Alarm for the HIAB 8108-2 crane is designed to alert the operator when the vehicle reaches a certain degree of tilt to ensure safe operation. Unfortunately, without the specific manual or direct reference to the exact degree of vehicle tilt for the alarm initiation, it is not possible to provide the precise angle. Generally, these types of alarms are set to go off before the vehicle reaches a critical angle at which the vehicle or crane would be at risk of tipping over. The exact tilt angle can vary based on the crane model and the manufacturer's safety settings. However, in practice, tilt warning alarms may be set anywhere from 2-5 degrees of tilt to alert operators well in advance of dangerous conditions, but this range does not directly answer the question posed.