I. Daily Maintenance (Pre/Post-Operation Checks)

Fluid Inspections

• Engine oil: Check level (after 10-min shutdown); top up with same-grade oil if low.

• Hydraulic oil: Level at sight glass midpoint; check for cloudiness/foaming.

• Coolant: Verify level in overflow tank; inspect for leaks.

• Fuel: Drain water (via fuel filter drain valve).

Critical Component Checks

• Tracks/tires: Adjust tension (10-30mm sag for tracks); tighten bolts.

• Bucket/attachments: Inspect tooth wear; grease pins/linkages.

• Air filter: Clean/replace clogged elements (blow out dust).

Leak & Noise Audit

• Inspect engine, hydraulic pumps, and hoses for leaks.

• Listen for abnormal sounds (e.g., pump whine, engine knocking).

II. Weekly Maintenance (50 Hours/Once Weekly)

Lubrication

• Swing bearing: Grease until fresh lubricant emerges.

• Cylinder pivot points: Lubricate all pins to prevent dry friction.

Filter Checks

• Fuel filter: Drain water; check for blockages.

• Hydraulic filters: Inspect for metal debris/discoloration.

Electrical System

• Clean battery terminals; ensure charge ≥12.6V.

• Test lights/horn functionality.

III. Monthly Maintenance (250 Hours/Once Monthly)

Fluid Replacement (As Needed)

• Engine oil: Initial change at 50hrs, then every 250hrs/6mo (whichever comes first).

• Hydraulic filters: Replace full-flow and return filters.

Cooling System

• Clean radiator fins (remove dust/debris); check fan belt tension.

Structural Inspection

• Undercarriage: Inspect rollers/idlers for leaks/wear.

• Bolts: Retorque critical fasteners (engine mounts, bucket linkages).

IV. Long-Term Maintenance (1,000 Hours/Annually)

Full Fluid Replacement

• Hydraulic oil: Replace fluid + flush tank (use OEM-specified grade).

• Gear oil: Renew travel reduction + swing gearbox oils.

Filter Replacement

• Air filter: Replace primary element (shorten intervals in dusty conditions).

• Fuel filters: Replace primary/secondary filters.

System Diagnostics

• Hydraulics: Test pump/valve pressures (requires specialized tools).

• Engine: Inspect valve clearance/injector spray pattern (technician recommended).

V. Seasonal Maintenance

Winter (Low Temps)

• Switch to low-viscosity oil (e.g., SAE 10W-30) and antifreeze (freezing point ≤-25°C).

• Add diesel anti-gel to fuel tank.

Summer (High Temps)

• Enhance radiator cleaning; halt operations if hydraulic oil exceeds 80°C.

VI. Long-Term Storage

Preparation

• Drain fuel tank OR fill completely (prevents condensation).

• Retract hydraulic rods; apply rust-preventive grease.

• Monthly: Start engine for 10 mins to circulate fluids.

Key Reminders

• Logkeeping: Document all maintenance (dates, parts replaced, anomalies).

• OEM parts: Use manufacturer-approved filters/fluids.

• Stop immediately if warning lights activate or abnormal noises occur.

*Rigorous maintenance extends excavator lifespan by 20-30% and slashes failure rates!*