Caterpillar 308 Mini Excavator
Inspection Guide
A popular compact excavator. Track life, hydraulic drift, and the house swivel are the cost centers, and rental units hide hard hours.
The 308 is a common compact excavator in rental fleets and on smaller sites, so anonymous, hard hours are normal. The wear lives in the rubber tracks and undercarriage, the hydraulics, and the swivel between house and undercarriage.
Rubber or steel tracks and the undercarriage wear with hard use.
CHECK Measure track life and inspect rollers and idlers.
Worn cylinders and valves let functions drift and weaken.
CHECK Hold a load for drift and test auxiliary hydraulics.
The swivel and swing bearing wear and leak.
CHECK Check swing play and inspect the swivel for leaks.
Cylinders leak and pins wear.
CHECK Inspect cylinders for leaks and check pin play.
Compact engines carry emissions systems needing proper regen.
CHECK Verify regen and check for derate warnings.
- Measure track and undercarriage wear
- Hold loads and check for hydraulic drift
- Check the house swivel and swing bearing
- Inspect cylinders and pins
- Watch for hour-meter vs wear mismatch
Heavy-duty diagnostic laptop with OEM adapters & software, Hydraulic pressure test kit with assorted fittings, Undercarriage wear gauges, Pin & bushing wear measurement tools, Ultrasonic thickness gauge for structural steel & buckets, Infrared thermometer / thermal camera, Oil & fluid sampling kit for lab analysis, Digital borescope …
See the full Heavy Equipment Inspection tool kit
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