Case CX31B Mini Excavator Service Manual Workshop Guide

Manual Included: • Service Manual: 931 Pages and 1051 Pages Specifications: • Brand: New Holland • Model: CX31B • Type: Mini Excavator • Manuals: Service Manual • Publication Numbers: S5PW0039E01 (Oct 2014) & S5PW0040E01 (Oct 2014) • Language: English • Format: PDF Description Table of Contents Specification Maintenance System Disassembly Troubleshooting Engine Manual Extract: CAUSES OF FAILURE AND MEASURES Symptom Causes Remedy 1. Engine is overloaded 1) Engine speed higher than the specified value 2) Pressure higher than the specified value 3) Seizure or damage of internal parts of the pump 1) Adjust the pump as per the specified value 2) Adjust the pump as per the specified value 3) Repair/replace the pump 2.Pump oil level is extremely low or the delivery pressure does not increase 1) Reduction of engine speed 2) Failure of pump mounting coupling 3) Seizure or damage of internal parts of the pump 1) Adjust the speed 2) Repair/replace the pump/coupling 3) Repair/replace the pump 3. Abnormal sound or vibration occurs (Cavitation phenomenon) 1) Low tank oil level 2) Air and water contamination in the hydraulic oil 3) Clogging on the suction strainer 4) Clogging on or throttling of the suction pipe 5) Damage of the caulking part of the piston shoe 6) Looseness of the pump mounting part 7) Coupling failure 1) Supply the hydraulic oil to the specified level 2) Retighten the bolts of the circuit, especially those of the suction pipes Replace the hydraulic oil contaminated with water 3) Clean/replace the suction strainer 4) Repair the suction pipe 5) Replace the cylinder barrel assembly 6) Fix the mounting part 7) Replace the coupling 4. Oil leakage occurs 1) Failure of the O-ring or packing 2) Looseness or tightening failure of the plug 3) Oil leakage from the oil seal edge 1) Replace the O-ring or packing 2) Retighten the plug with the specified t orque 3) Repair/replace the oil seal or shaft