Komatsu PC300-5, PC300LC-5 Hydraulic Excavator Operation and Maintenance Manual (SEAM02070504)

These PC300-5 and PC300LC-5 excavators usually live in tough environments—quarries, pipe jobs, demo sites—where they’re digging hard all day and can’t afford surprise downtime. This Operation and Maintenance Manual is what I’d use to set a sane service rhythm, so the machine stays tight and predictable under load. If, for example, the swing feels lazy or the boom starts to drift overnight, I’d go here to verify the basic checks and routine adjustments before calling in heavy diagnostics.

Applications & Use Cases

• Plan preventive maintenance so filters, pins, and wear points get attention before they start costing you cylinders or pumps.
• Trace early hydraulic issues by following the recommended daily and weekly inspections instead of guessing at the cause.
• Verify adjustment points on things like tracks, controls, and attachments to keep the machine tracking straight and digging square.
• Align your service schedule with real-world duty cycles, so you can group jobs and limit downtime.
• Train new operators on what to inspect at the start and end of shift, not just how to run the levers.

FAQ

Q: Can I keep this manual on a tablet in the cab?

A: Yes, it works fine digitally; just bookmark the maintenance and inspection pages you use most.

Q: Is it worth printing parts of this manual?

A: I’d print the daily/periodic checklists and keep them in a plastic sleeve in the service truck or site office.

Safety Note

Always lock out, tag out, and relieve system pressure exactly as described before you put a wrench on this machine.