Adjusting The No-Load Maximum Or Minimum Speed; Sensor Inspection; Oil Pressure Switch; Thermo Switch - Komatsu 82E Series Shop Manual

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
Engine application
class
VM
Note) The engine speed may differ from the
a b o v e s ta n d a r d d e p e n d i n g o n 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
(Unit: rpm)
No-load minimum
speed (± 25)
800
2. INSPECTION AND ADJUSTMENT
2-29