TM 5-3805-280-24-1
Tests
1. Adjust track sag to specifications. (See procedure in
Group 9020-20.)
2. Install the temperature probe on the hydraulic
tank-to-pump suction line. (See JT05800 Digital
Thermometer Installation in this group.)
3. Heat hydraulic oil to the specified temperature. (See
Hydraulic System Warm-Up Procedure in this group.)
Hydraulic Oil--Specification
Temperature ........................................................... 50 5C (120 10F)
Boom Position
4. Move machine to position shown for each test. Run
machine at specifications.
Engine--Specification
Speed ........................................................................................... Fast Idle
Work Mode Selector--Specification
Position ........................................................................................ Dig Mode
E Mode Switch--Specification
Position .................................................................................................. Off
Arm, Bucket, Swing and Propel Position
9025
HP Mode Switch--Specification
25
55
Position .................................................................................................. Off
Auto-Idle Switch--Specification
Position .................................................................................................. Off
5. Actuate control valve to full stroke for each function.
Record the cycle time for each function.
Boom Up--Specification
Cycle Time............................................................................. 3.1 0.3 sec
Propel 3-Revolution Position
Boom Down--Specification
Cycle Time............................................................................. 2.5 0.3 sec
Arm In--Specification
Cycle Time............................................................................. 3.9 0.3 sec
Continued on next page
TX,9025,GG2645 1921MAY982/3
6-186
