TM 5-3805-281-24-1
Tests
ARM REGENERATIVE SOLENOID VALVE
(SC) HARNESS TEST
ESSENTIAL TOOLS
JT07062 Test Harness
The purpose of test is to check continuity in wiring
harness to the arm regenerative solenoid valve (B) coil
and there is a signal from engine and pump controller.
NOTE: Reading displayed on the laptop computer for "9
Arm regenerative control pressure" is a calculated
pressure from data stored in the engine and pump
controller. A typical reading at fast and slow idle
with all function in neutral is 0.0 psi. To actuate
the arm in regenerative function, run the engine at
fast idle and then operate boom up and arm in
functions in combined operation. A typical reading
increases to 381.5 psi. The readings can vary
from machine to machine. What to look for is that
there is a reading and it increases when arm in
regenerative function is actuated.
The increased reading indicates that the rear
pump pressure sensor, arm in pressure sensor,
and boom up pressure switch are OK and a
electrical signal to the arm regenerative solenoid
9025
valve is generated. (For circuit operation, see Arm
25
45
Regenerative Valve Operation in Group 9025-05.)
The arm regenerative function does not operate in
A--Solenoid Valve Manifold
Grading and Precision Work Modes.
B--Arm Regenerative Solenoid Valve (SC)
C--Speed Sensing Solenoid (SD)
D--Propel Speed Change Solenoid (SI)
IMPORTANT: Turn key switch off before
E--Power Boost Solenoid (SG)
disconnecting any electrical
connectors. Disconnecting electrical
connectors while engine is running or
with key switch on can damage engine
and pump controller or other electrical
components.
1. Stop engine. Turn key switch to OFF.
2. Remove wire clip.
Continued on next page
CED,TX08227,3024 1917MAR981/2