TM 5-3805-280-24-1
Tests
NOTE: Proportional solenoid valve output pressure must
be measured using a pressure gauge. The
pressure shown on laptop computer is calculated
from an electrical signal from the engine and
pump controller and does not change as the
solenoid valve adjustment is made.
2. Disconnect the line (D, E, F, or G) at solenoid valve
manifold (A) for solenoid valve (H) being checked.
Install test connection (B and C). For steel line (D)
from the arm regenerative solenoid valve (SC) use the
JT03464 Tee. Use the JT03001 Tee for the others.
Install the digital pressure and temperature analyzer,
and transducer, or a gauge (C).
3. Connect the laptop computer.
4. Install the temperature probe on the hydraulic
tank-to-pump suction line. (See JT05800 Digital
Thermometer Installation in this group.)
A--Solenoid Valve Manifold
5. Heat hydraulic oil to the specified temperature. (See
B--JT03464 Tee or JT03001 Tee
Hydraulic System Warm-Up Procedure in this group.)
C--Gauge
D--Arm Regenerative Solenoid Valve (SC) Line
Oil--Specification
E--Speed Sensing Solenoid Valve (SD) Line
F--Propel Speed Change Solenoid Valve (SI) Line
Temperature ........................................................... 50 5C (120 10F)
G--Power Boost Solenoid Valve (SG) Line
9025
H--Solenoid Valve (4 used)
25
6. Run the machine at specification. To check each
86
solenoid valve, operate the machine as follows and
then record the pressure reading from gauge and
laptop computer:
Engine in Standard Mode--Specification
Speed ........................................................................................... Fast Idle
Work Mode Selector--Specification
Position ........................................................................................ Dig Mode
E Mode Switch--Specification
Position .................................................................................................. Off
HP Mode Switch--Specification
Position .................................................................................................. Off
Continued on next page
TX,9025,GG2121
1921MAY984/6
6-217
