Keeping your JLG 400S in peak operating condition starts with the right parts and a solid maintenance routine. Ensure your boom lift stays in top shape with high-quality hydraulic filter kits, decals, toggle switches, and more. The JLG 400S is designed for stability and versatility, making it ideal for outdoor jobs requiring high reach and maneuverability. Don’t forget to stay on top of your maintenance—secure the parts you need to keep your JLG 400S running smoothly! Keep reading for a comprehensive maintenance guide for your machine.

Walk-Around Inspection

Before operating your JLG 400S, it’s crucial to perform a thorough walk-around inspection to prevent costly downtime and ensure operator safety. Regular inspections help identify issues early, allowing your boom lift to operate efficiently. Key areas to focus on during your inspection include:

• Checking for hydraulic leaks, loose hoses, or damaged connections.
• Inspecting tires for proper inflation and wear.
• Ensuring safety decals are in place and legible.
• Verifying the platform and guardrails are secure.

Daily Inspection

• Check battery charge and connections.
• Inspect the hydraulic fluid level and condition.
• Test emergency stop function and horn operation.
• Ensure platform controls are responding correctly.

50-Hour Maintenance

• Change the hydraulic tank return filter.
• Inspect and lubricate swing bearings.
• Check all fasteners and tighten as needed.

250-Hour Maintenance

• Inspect and clean the hydraulic tank breather filter.
• Check and lubricate platform extension components.
• Inspect all electrical connections for corrosion.

500-Hour Maintenance

• Change engine oil and filter.
• Inspect and clean the battery terminals.
• Test and calibrate limit switches.

1,000-Hour Maintenance

• Flush and replace hydraulic oil.
• Inspect and service lift cylinders.
• Check for structural wear on the platform.

2,000-Hour Maintenance

• Replace wear pads and slide blocks.
• Inspect and replace any deteriorated hydraulic hoses.

Final Maintenance Recommendations

Regular maintenance keeps your JLG 400S operating reliably. For a full range of JLG parts, explore our extensive EquipmentShare parts catalog. If you can't find the part you need, reach out to our parts experts for a custom order.