TM 5-3805-281-24-1
Diagnostic Information
Part Name
Pump Control Pressure
Pump Pressure Sensor
Engine Speed Sensor (N
Sensor
Sensor)
Valve (SG)
Operational
Senses pump control valve
Senses front and rear pump
Senses actual engine
Sends a pilot pressure
Function
pressure in control valve to
delivery pressure.
speed for speed sensing
signal to temporary
control propel motor speed
system
increase system relief valve
change
pressure setting.
Control Problems
No sensor output signal. No
Loss of propel speed
Speed sensing system
No pressure signal sent to
control signal to propel
control and HP (high
does not function.
system relief valve. System
power) mode.
relief valve pressure setting
valve.
does not increase.
Machine Symptoms
Propel motor operates at
Propel speed does not
Engine may stall when
Digging or lifting force does
slow speed when propel
increase when propel
machine operated at high
not increase.
speed switch is turned to
speed switch in fast speed
altitude or under heavy
fast speed.
(rabbit). HP mode does not
operating conditions.
work.
Laptop Computer
04 and 05 Service codes
02 and 03 Service codes
--
--
Self-Diagnostic
are displayed.
are displayed.
Function
Laptop Computer
Monitor No. 1 and 6, Front
--
Monitor No. 14, Actual
Monitor No. 12, Power
Monitoring Function
and rear pump control
engine speed.
boost control pressure.
pressure.
Harness Check
--
--
--
Install JT07062 Test
Harness. Check that
indicator light is on.
Notes
At slow idle with functions
During combined operation,
Located on pump drive
If indicator light is off, check
in neutral typical pressure is
arm speed is slow if
wiring harness.
980--1569 kPa (9.8--15.7
malfunction is at sensor for
pump.
bar) (142--228 psi). A
rear pump.
lower pressure may be an
open circuit. A higher
9025
pressure may be a short
15
circuit.
3
Description of
See Propel Motor Speed
See Propel Motor Speed
--
See Power Boost Control
Operation
Change Circuit Operation in
Change Circuit Operation in
Circuit Operation in Group
Group 9025-05.
Group 9025-05 or HP (High
9025-25.
Power) Mode Speed
Control Circuit Operation in
Group 9010-05.
Continued on next page
CED,TX08227,3177
1904JUN982/9
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