Mobile Crushers Maintenance Checklist for John Equipment
Regular maintenance is essential to ensure the optimal performance and longevity of your John mobile crushers. Follow this comprehensive checklist to keep your equipment running smoothly and minimize downtime.

Daily Maintenance Checks
1. Visual Inspection – Examine the crusher for visible damage, loose bolts, or worn components. Check hydraulic hoses and electrical connections for leaks or fraying.
2. Lubrication – Verify that all grease points are properly lubricated, including bearings, pivot points, and moving parts. Use John -approved lubricants.
3. Hydraulic System – Inspect hydraulic fluid levels and top up if necessary. Look for leaks around cylinders, pumps, and valves.
4. Engine Oil & Coolant – Check engine oil levels and coolant levels to prevent overheating. Replace fluids according to the manufacturer’s schedule.
5. Belts & Pulleys – Ensure belts are properly tensioned and free from cracks or excessive wear. Adjust or replace as needed.
Weekly Maintenance Tasks
1. Filter Replacement – Inspect air, fuel, and hydraulic filters for clogs or contamination. Replace filters according to service intervals.
2. Crusher Wear Parts – Examine jaw plates, liners, and blow bars for wear or damage. Rotate or replace them to maintain crushing efficiency.
3.Track Tension (If Applicable) – Adjust track tension on tracked crushers to prevent excessive wear or slippage during operation.
4.Electrical System Check – Test battery terminals for corrosion and ensure wiring connections are secure to avoid electrical failures.

Monthly & Quarterly Inspections
1.Structural Integrity Check – Inspect the crusher frame, hopper, and discharge conveyor for cracks or stress fractures that could compromise safety and performance.
2.Gearbox & Drivetrain Inspection – Verify gearbox oil levels and inspect drivetrain components such as shafts and couplings for misalignment or wear.
3.Safety Systems Test – Ensure emergency stops, alarms, and safety guards are functioning correctly per OSHA regulations.
Seasonal & Annual Maintenance Tips
1.Full Fluid Replacement – Drain and replace hydraulic fluid, engine oil, coolant, and transmission fluids annually to prevent contamination buildup.
2.Professional Servicing Schedule a certified John technician inspection annually to assess internal components like bearings seals motors pumps etc
