TUBE AS 1930938 - Caterpillar

Table 1
Related Components: Possible Causes: Recommended Action:
Valve/Lines Idler pump bypass stem is malfunctioning Refer to Troubleshooting, "Bypass Valve (ACS Valve) - Functional Test"
Boom Pump to Cylinder Rod End (PCRE) stem is malfunctioning Refer to Troubleshooting, "IMV Calibration - Functional Test"(1)
Refer to Troubleshooting, "IMV Controllability Troubleshooting"(2)
Boom Cylinder to Tank Head End (CTHE) Independent Metering Valve (IMV) stem is malfunctioning
Compensator spool in bucket IMV section is malfunctioning Refer to Troubleshooting, "IMV Controllability Troubleshooting"(2)
Pilot relief valve is malfunctioning Refer to Testing and Adjusting, KENR9615, "Relief Valve (Pilot) - Test and Adjust"
Warm-up valve failure Refer to Troubleshooting, "Hydraulic System Warm-Up - Functional Test"
Bucket relief valve failure Refer to Testing and Adjusting, KENR9615, "Relief Valve (Line) - Test and Adjust"
Electronics/Harness/Solenoids Idler pump bypass Proportional Hydraulic Modulating Valve (PHMV) solenoid is malfunctioning Refer to Troubleshooting, "Bypass Valve (ACS Valve) - Functional Test"
Boom PCRE PHMV solenoid is malfunctioning Refer to Troubleshooting, "IMV Calibration - Functional Test"(1)
Refer to Troubleshooting, "IMV Controllability Troubleshooting"(2)
Boom CTHE PHMV solenoid is malfunctioning
Software Idler pump bypass calibration is incorrect Refer to Troubleshooting, "Pump Stroke - Functional Test"
Bucket PCRE PHMV cracking current is incorrect Refer to Troubleshooting, "IMV Calibration - Functional Test"(1)
Bucket PCRE PHMV slope is incorrect
Bucket CTHE PHMV cracking current is incorrect
Bucket CTHE PHMV slope is incorrect
Combiner calibration is incorrect Refer to Troubleshooting, "IMV Calibration - Functional Test"(1)
Combiner slope is incorrect
Pump/Motor Pump displacement does not match desired displacement Refer to Testing and Adjusting, KENR9615, "Pump Flow Measurement"
(1) Denotes actions that should be completed first in the troubleshooting sequence.
(2) Denotes Functional Tests that should be considered as a last resort in the troubleshooting process.