TM 5-3805-281-24-1
Tests
If laptop computer with excavator diagnostics program
is not available, use the digital pressure and
temperature analyzer, and transducer, or a gauge.
a. Stop the engine.
b. Loosen vent plug (K) to release the air pressure in
hydraulic oil tank.
c. Install adapters (C) and male quick coupler to test
ports in rear (A) and front (B) pumps. Connect the
analyzer and transducer or gauges.
2. Install the temperature probe on the hydraulic
tank-to-pump suction line. (See JT05800 Digital
Thermometer Installation in this group.)
3. Install the electronic tachometer. (See JT05801
Clamp-On Electronic Tachometer Installation in this
group.)
4. Heat hydraulic oil to the specified temperature. (See
Hydraulic System Warm-Up Procedure in this group.)
Hydraulic Oil--Specification
Temperature ........................................................... 50 5C (120 10F)
9025
25
5. Check that fast idle is 2050--2125 rpm. Record the
112
fast idle speed. Adjust as needed before continuing
test. (See procedure in Group 9010-20.)
6. Run machine as specified.
Engine--Specification
Speed .............................................................................. 2050--2125 rpm
Work Mode Selector--Specification
A--Rear Pump
B--Front Pump
Position ........................................................................................ Dig Mode
C--TH108328 Adapter (2 used)
K--Vent Plug
E Mode Switch--Specification
Position .................................................................................................. Off
HP Mode Switch--Specification
Position .................................................................................................. Off
Continued on next page
CED,TX08227,3143
1928MAY983/13
6-259
