TM 5-3805-280-24-1
Theory of Operation
HP (HIGH POWER) MODE SPEED CONTROL CIRCUIT OPERATION
9010
05
8
Engine speed is approximately 1600 rpm or faster.
The function of the HP (high power) mode speed
The electrical signal from the engine rpm dial (B) to
control circuit (K) is to increase engine speed when a
the engine and pump controller (I) indicates the
little more hydraulic power is needed for arm in
engine speed.
operation. The HP mode is available when in the dig
Arm in function is actuated. The arm in pressure
work mode. HP mode is used in the standard and E
sensor (D) sends an electrical signal to the engine
(economy) modes.
and pump controller (I).
The pump delivery pressure is approximately 23 440
The HP mode is actuated with the following conditions:
kPa (234 bar) (3400 psi) or higher. The pump
HP mode switch (A) is pushed down. The HP
pressure sensors (E) send an electrical signal to the
engine and pump controller.
indicator is ON.
Continued on next page
CED,OUOE003,1055
1911AUG981/2
3-8
