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The hydraulic pump is the heart of the excavator's hydraulic system. This article covers the three common faults—abnormal noise, weak operation, and external leakage—with their symptoms and diagnosis, helping owners determine whether the pump itself is worn or a peripheral component is at fault, avoiding unnecessary teardown.
Engine overheating is the leading cause of cylinder scoring and head gasket failure. This article covers CAT engine cooling system care—coolant selection, change intervals, radiator cleaning, and thermostat & water pump inspection—helping owners avoid major engine damage from poor cooling.
Electrical faults are common yet tricky on excavators. This article lays out the basic troubleshooting sequence—from power supply, fuses, and relays to sensors and wiring—explaining how to diagnose common electrical faults safely and build a systematic approach.
Weak or noisy swing is a common travel-system fault. This article analyzes common causes of swing motor weakness—swing reducer gear wear, excessive swing bearing clearance, internal motor leakage—and lays out an outside-in troubleshooting path.
Winter cold tests an excavator's starting, hydraulic, and electrical systems. This article covers winter care—proper low-temperature fluids, battery & starting checks, preheat procedures, and hydraulic warm-up—to help equipment safely survive the cold season.
A CAT engine overhaul is a systematic project. This article outlines the standard overhaul process in four stages—diagnosis & assessment, disassembly & cleaning, measurement & matching, assembly & calibration—and lists the parts that must be replaced, helping you plan clearly and avoid missing parts that cause a second teardown.
Undercarriage parts are the most heavily worn on an excavator. This article explains wear criteria and replacement timing for the track rollers, carrier rollers, sprockets, idlers, and tracks (the 'four wheels and one track'), plus daily inspection tips to extend undercarriage life and cut maintenance costs.
The diesel filter is the first line of defense for the high-pressure common-rail injection system. This article covers change intervals, selection standards, and the damage inferior filters cause to injectors, helping owners choose correctly and extend the life of precision parts like injectors and fuel pumps.
When fault codes appear on a CAT excavator display, fast and accurate interpretation is key. This article organizes common codes across engine, hydraulic, and electrical systems with their meanings and troubleshooting logic, helping owners locate issues immediately and avoid blind disassembly that causes secondary damage.
320 GX Hydraulic Excavator
