Technical Information - 44 - 4. Oil pressure lowered Check if oil pressure gauge indicates wrongly Check oil amount Too low Normal Use recommended oil Check cooling (replenish) temperature Too high Normal Refer to engine overhea Inspect oil quality Normal Check oil relief Water & fuel mixed Improper valve in oil Replace with Retighten Disassemble engine Normal recommended oil Replace or injection pump Disassemble engine Nor mal Check temper cooling ature Nor mal Inspect oil quality Nor mal Check oil relief valve Nor Disassemble engine Check oi l amount Too low Use recommended oil (replenish) Too high Water & f in oil uel mixed Impr oper Replace with recommended oil