. OPERATION DETAILED CONTROLS AND GAUGES Hydraulic Oil Temperature Monitor 3 - 10 Monitor (2) warns op erator that the hydrau lic oil temperatur e has risen. If monit stop the monitor or lights up re engine and (2) changes d during wait until to green. Check f cause o Engine Oil Pressure Monitor (3) lights up red if the engin e lubrication o il pressure goes below n ormal level. lig hts up the e ngine immediately, system engine REMARK The lam p may lights up momentaril y and th e alar m buzzer so unds when th e engine star ts up or stops, but thi s is nothing abnormal.