TM 5-3805-281-24-1
Theory of Operation
E (ECONOMY) MODE SPEED CONTROL CIRCUIT OPERATION
9010
05
8
control motor (C) to run the engine in a speed range
The function of E (economy) mode speed control
lower than standard mode. The adjustable range for
circuit (F) is to operate the engine at a lower speed
engine speed is from the specified speed for E mode
range when full engine power is not needed. The
down to slow idle and is in proportion to the engine
engine power is somewhat less but digging power is
rpm dial position. The electrical signals to the motor
the same as in standard mode. Operating in E mode
are calculated from data stored in the engine and
also improves fuel efficiency and reduces the noise
pump controller (D). The EC (engine control) sensor
level. The E mode function is available when dig mode
(B) sends an electrical feedback signal to the controller
is selected as the work mode. The E mode indicator is
indicating the motor's position.
ON when the E mode switch (E) is push down to show
that E mode is actuated.
The parameter for engine speed in E (economy) mode
NOTE: Standard mode is when the E mode and HP
can be change from the factory setting within a
mode switches are OFF.
specified range. (See Excavator Diagnostic Software
Special Function--Engine Speed in Group 9025-25.)
When E mode is actuated, the engine and pump
controller (D) sends electrical signals to the engine
TX,9010,GG2869
1917DEC971/1
