Proper maintenance is the key to maximizing your Komatsu excavator's performance, reliability, and lifespan. This comprehensive guide covers everything you need to keep your equipment running at peak efficiency.

Daily Maintenance Checklist

Start each day with these critical checks (approximately 15-20 minutes):

Before Starting the Engine:

✓ Walk around inspection - check for leaks, damage, or loose parts
✓ Check engine oil level
✓ Check coolant level in radiator
✓ Inspect hydraulic oil level
✓ Check fuel level and water separator
✓ Inspect tracks, sprockets, and undercarriage
✓ Check for loose bolts or pins

After Starting (Warm-Up Period):

✓ Check instrument panel for warning lights
✓ Test all hydraulic functions
✓ Listen for unusual noises
✓ Check brake operation
✓ Test steering and travel controls

Weekly Maintenance Tasks

Perform these checks weekly or every 50 operating hours:

Air Filter: Inspect and clean pre-cleaner, replace if damaged
Hydraulic System: Check for leaks, inspect hose conditions
Cooling System: Clean radiator fins, check coolant condition
Fuel System: Drain water separator, check fuel lines
Undercarriage: Inspect for excessive wear, check track tension
Bucket and Teeth: Check for wear, tighten bolts
Grease Points: Lubricate all fittings per service manual

Monthly/250 Hours Service

Critical Service Items:

Engine Oil & Filter: Change every 250 hours or monthly
Fuel Filters: Replace primary and secondary filters
Hydraulic Filter: Replace return line filter
Air Filter: Replace outer element (clean inner)
Swing Bearing: Lubricate and inspect
Final Drives: Check oil level and condition

Critical Wear Parts

These components experience the most wear and require regular replacement:

Undercarriage (High Wear)

• Track shoes and links
• Sprockets and idlers
• Rollers (top and bottom)
• Track adjusters

Filters (Regular Replacement)

• Engine oil filters
• Fuel filters (primary & secondary)
• Air filters (inner & outer)
• Hydraulic return filters

Bucket Components

• Bucket teeth
• Cutting edges
• Pins and bushings
• Side cutters

Hydraulic Components

• Hydraulic hoses
• Cylinder seals
• Hydraulic pump parts
• Control valve components

💡 Pro Tip:

Keep a maintenance log with dates, hours, and parts replaced. This helps track patterns, predict future needs, and maintain resale value. It's also invaluable for warranty claims and insurance purposes.

Stock Up on Essential Komatsu Parts

Avoid costly downtime by keeping commonly replaced parts in stock. We recommend maintaining:

2 sets of engine oil filters
2 sets of fuel filters (primary and secondary)
1 set of air filters (inner and outer)
2 hydraulic return filters
Spare bucket teeth and cutting edges
Emergency hydraulic hoses

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Komatsu Excavator Maintenance Guide: Complete Checklist