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DIAGNOSE HYDRAULIC SYSTEM MALFUNCTIONS - Continued
DIAGNOSE PILOT CIRCUIT MALFUNCTIONS

Maintenance Manual For Hydraulic Excavator Model 230Lcr
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TM 5-3805-280-24-1
Diagnostic Information
Symptom
Problem
Solution
Engine and pump controller
Check engine and pump controller.
See Group 9015-15.
Pilot controller
Check pilot pressure at control valve.
See Group 9025-25.
Pilot pressure regulating valve
Check pilot pressure regulating valve
pressure setting. See Group
9025-25.
Check valves and flow control valves
Inspect valves. See Group 3360.
in control valve
TX,15,GG2162 1913AUG983/3
9025
15
14
6-103


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