Joint Light Tactical Vehicle (JLTV) Course Practice Test – Prep & Practice Exam

The SPNSN ERROR light activates when the hydraulic oil temperature reaches 212 degrees. This threshold is critical as it signifies potential overheating, which can affect the performance and safety of the systems reliant on hydraulic pressure.

Hydraulic systems operate most efficiently within a specific temperature range, and exceeding 212 degrees indicates that the oil may be breaking down or losing its lubricating properties, leading to possible failure of hydraulic components. Thus, maintaining the hydraulic oil temperature below this threshold is essential to ensure reliable vehicle operation and prevent damage to the system. Understanding this temperature limit is key for operators to monitor and maintain the health of their JLTVs effectively.