TM 5-3805-280-24-1
Diagnostic Information
Symptom
Problem
Solution
Low pilot oil pressure
Check pilot pressure regulating
valve. See Group 9025-25.
Front and rear pump control valves
Check pressure. See Group
9025-25. Inspect. See Group 3360.
Hydraulic Oil Overheats
Low oil level
Check oil level in hydraulic oil tank.
Plugged oil cooler
Test air flow through oil cooler.
Oil viscosity too light
Use recommended oil. See General
Information Section.
Return filter plugged
Replace filter. See Group 3360.
System relief valve malfunction
Test system relief valve. See Group
9025-25.
Oil cooler bypass valve stuck open
Repair or replace. See Group 3360.
Restriction valve stuck closed
Repair or replace. See Group 3360.
Fan belt slipping
Check for worn belt. Check tension
adjuster. See Remove and Install
Fan Belt in Group 0510.
9025
15
Pump stuck at maximum
Check flow rate using propel cycle
13
displacement
times. Do hydraulic pump flow test.
See Group 9025-25.
No Hydraulic Functions
Pilot shutoff lever in LOCK position
Push shutoff lever to UNLOCK
(rearward)
position (forward).
No oil
Check oil level in hydraulic oil tank.
Pump drive failure
Check pump drive coupling. See
Group 3360.
Restricted pump suction screen
Clean pump suction screen. See
Group 3360.
Poor Combined Operation
Dig or propel pressure switch
Check pressure switches. Check
wiring harness. See Group 9015-15.
See harness test in Group 9025-25.
Continued on next page
TX,15,GG2162
1913AUG982/3
6-102
