TM 5-3805-280-24-1
Tests
If laptop computer with excavator diagnostics program
is not available, use the digital pressure and
temperature analyzer, and transducer, or a gauges.
a. Stop the engine.
b. Loosen vent plug (K) to release the air pressure in
hydraulic oil tank.
c. Install adapters (A) and male quick coupler to test
ports in rear (B) and front (C) pumps. Connect the
analyzer and transducer or gauges.
2. Install the temperature probe on the hydraulic oil
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.)
Oil--Specification
Temperature ........................................................... 50 5C (120 10F)
9025
25
5. Check that fast idle is 2180--2205 rpm. Adjust as
106
needed before continuing test. Record the fast idle
speed.
Engine Fast Idle in Standard Mode--Specification
Speed .............................................................................. 2180--2205 rpm
A--Adapter
B--Rear Pump
Work Mode Selector--Specification
C--Front Pump
K--Vent Plug
Position ........................................................................................ Dig Mode
E Mode Switch--Specification
Position .................................................................................................. Off
HP Mode Switch--Specification
Position .................................................................................................. Off
Auto-Idle Switch--Specification
Position .................................................................................................. Off
Continued on next page
TX,9025,GG2661 1906MAY973/14
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