. OPERATION DETAILED CONTROLS AND GAUGES 3 - 24 ECO Gauge This gauge (14) s how s the wo rking load status. When th e gauge is in green range A, the to medium. When t he gauge is i n orange r ange B, the load i s heavy. orange ange, abnormalit the machin e, bu t to protect the reduce the engine o utput to a point where there is no adverse effect on t he operation. Generally, carry out energy-saving operations in th e green rang e. Reducing the frequency of travel also h elps save energy. Conside energy