TM 5-3805-280-24-1
Diagnostic Information
Power Boost Switch
HP (High Power) Mode Switch
E (Economy) Mode Switch
Operational Function
To actuate the power boost function.
To actuate the HP mode function.
To actuate the E mode function
Control Problems
For open circuit, no electrical signal
No electrical signal to engine and
For open circuit, no electrical
to engine and pump controller. For
pump controller. For short circuit,
signal to engine and pump
short circuit, operates for 8 seconds
electrical signal to engine and pump
controller. For short circuit,
when key switch turned on, but then
controller at all times.
electrical signal to engine and
becomes inoperative.
pump controller at all times.
Machine Symptoms
Digging or lifting force does not
For open circuit, engine speed does
For open circuit, engine speed
increase.
not increase when hydraulic
does not decrease from fast idle.
pressure increases to specified
For short circuit, engine speed
pressure. For short circuit, engine
does not increase to fast idle.
speed increases even with switch off
(up).
Laptop Computer with
--
--
--
Excavator Diagnostic
Software Self-Diagnostic
Functions
Laptop Computer with
Monitor No. 25, Power boost switch
Monitor No. 24, HP mode switch.
Monitor No. 22, E mode switch.
Excavator Diagnostic
Software Monitoring
Function
Harness Check
--
--
--
Notes
Power boost function operates for 8
HP indicator light on when switch is
E indicator light on when switch
seconds after switch is pushed.
on (down).
is on (down).
Description of Operation
See Power Boost Control Circuit
See HP (High Power) Mode Speed
See E (Economy) Mode Speed
Operation in Group 9025-25.
Circuit Operation in Group 9010-05.
Control Circuit Operation in
Group 9010-05.
9025
15
7
Continued on next page
TX,15,GG2238 1913AUG986/10
6-96
