. OPERATION DETAILED CONTROLS AND GAUGES immediately, check the lubrication system and level of oil in the engine oil pan. REMARK When the engine is started or stopped, the lamp may light up momentarily and the buzzer sound, but this does not indicate an abnormality. 3 - 11 Hydraulic Oil Temperature Monitor Monitor (2) warns op erator that the hydrauli c oil temperatur e has risen. If monito stop the monitor r lights up re engine and (2) changes t Check fo cause o Engine Oil Pressure M Monitor (3) lights up r ed if the engi ne lubrication o il pressure goes below n ormal level. ghts up the e ngine