2. INSPECTION AND ADJUSTMENT 2.3 Adjusting the No-load Maximum or Minimum Speed 1) After warming the engine up, gradually raise the speed and set it at the no-load maximum revolution. 2) If the no-load maximum speed is out of the stan- dard, adjust it by turning the high idle limiting bolt. The no-load maximum speed standard is shown in the specification tables in 1.1 of the chapter 1. 3) Then set the no-load minimum speed by adjust- ing the low idle limiting bolt. No-load minimum speed standards (Unit: rpm) Note) The engine speed may differ from the above standard depending on an engine installed on a machine unit.
2.4 Sensor Inspection 2.4.1 Oil pressure switch Disconnect the connector from the oil pressure switch. Keep the voltammeter probes in contact with the switch terminal and cylinder block while operat- ing the engine. It is abnormal if circuit is closed. 2.4.2 Thermo switch Place the thermo switch in a container filled with antifreeze or oil. Heat it while measuring the fluid temperature. The switch is normal if the voltamme- ter shows continuity when the fluid temperature is 107 – 113 °C. 82E-5 – 98E-5 SERIES 2-29 Engine application class No-load minimum speed (± 25) VM 800