TM 5-3805-281-24-1
Diagnostic Information
Part Name
Speed Sensing Solenoid
Arm Regenerative
Propel Speed Change
Propel Pressure Switch
Valve (SD)
Solenoid Valve (SC)
Solenoid Valve (SI)
Operational
Sends a pilot pressure
Sends a pilot pressure
Sends a pilot pressure
Senses when propel
Function
signal to load piston in
signal to shift the arm
signal to shift speed
function is actuated.
pump regulators to reduce
regenerative valve to route
selector valve spool in
pump flow.
return oil from arm cylinder
propel motors.
rod end to the head end.
Control Problems
No pressure signal sent to
No pressure signal sent to
No pressure signal sent to
No electrical signal sent to
load piston in pump
shift arm regenerative
shift speed selector valve
engine and pump controller.
regulators.
valve.
spool.
Machine Symptoms
Torque required to drive
During arm in operation,
Travel speed does not
Engine speed does not
pumps exceed engine
there is arm cylinder
increase when propel
increase from auto-idle
output power. Engine speed
cavitation and controllability
speed switch is turned to
speed when propel function
can decrease below rated
becomes less.
fast speed (rabbit).
actuated. Propel speed
speed.
does not increases with
propel speed switch in fast
speed (rabbit). Travel alarm
does not sound.
Laptop Computer
--
--
--
--
Self-Diagnostic
Function
Laptop Computer
Monitor No. 11, Speed
Monitor No. 9, Arm
Monitor No. 10, Propel
Monitor No. 20, Pressure
Monitoring Function
sense control pressure.
regenerative control
motor control pressure for
switch.
pressure for pressure signal
pressure signal in engine
in engine and pump
and pump controller.
controller.
Harness Check
Install JT07062 Test
Install JT07062 Test
Install JT07062 Test
--
Harness. Check that
Harness. Check that
Harness. Check that
indicator light is on.
indicator light comes on.
indicator light is on.
Notes
If indicator light is off, check
If indicator light is off, check
If indicator light is off, check
Located below front of
9025
wiring harness.
wiring harness.
wiring harness. Also check
control valve adjacent to
15
switches and sensors in
shuttle valve.
4
propel motor speed change
circuit.
Description of
See Engine Speed Sensing
See Arm Regenerative
See Propel Motor Speed
See Propel Motor Speed
Operation
Control Circuit Operation in
Valve Operation in Group
Change Circuit Operation in
Change Circuit Operation in
Group 9025-25.
9025-05.
Group 9025-05.
Group 9025-05 or Auto-Idle
Mode Speed Control Circuit
Operation in Group
9010-05.
Continued on next page
CED,TX08227,3177
1904JUN983/9
6-111
