Genie GS-4390 RT Rough Terrain Scissor Lift Parts

Keeping your Genie GS-4390 RT in peak operating condition starts with the right parts and a solid maintenance routine. Ensure your scissor lift stays in top shape with high-quality switch assemblies, hydraulic filters, oil filters and more. The GS-4390 RT delivers up to 43 ft of platform height, 1,500 lb capacity, and dual deck extensions for productivity on rugged terrain. Don’t forget to stay on top of your maintenance—secure the parts you need to keep your Genie GS-4390 RT running smoothly!

Walk-Around Inspection

• Inspect the scissor stack, lift cylinders, and outriggers for wear or leakage
• Check electrical wiring, alarms, and safety switches for damage
• Verify decals, capacity labels, and emergency stop functions are intact
• Inspect wheels and tires for wear, torque, and inflation
• Check that platform guardrails and lanyard anchor points are secure

Daily Maintenance

• Check engine oil, coolant, hydraulic oil, and fuel levels
• Inspect the radiator and cooling fins for dust or blockage
• Drain the fuel/water separator if water is present
• Check for visible hydraulic leaks or loose fittings
• Clean battery terminals and check hold-down brackets

Every 50 Hours

• Lubricate platform and scissor pivot points
• Check outrigger function and inspect pads for wear
• Inspect steering system and brake components

Every 250 Hours

• Change engine oil and replace the engine oil filter
• Clean radiator, oil cooler, and replace any cracked hoses
• Inspect platform extension lock pins and swing gates

Every 500 Hours

• Replace fuel filter and water separator
• Replace hydraulic return filter
• Inspect and clean generator and electrical connections

Every 1,000 Hours

• Flush and replace hydraulic oil
• Replace engine air filter elements (primary and secondary)
• Inspect joystick and controller functionality for drift or lag

Every 2,000 Hours

• Flush and replace engine coolant
• Inspect tilt sensor calibration and platform overload sensors
• Inspect swing gate latches, lanyard anchors, and platform welds

Annual Maintenance

• Check torque on all major fasteners and structural pins
• Test lift function limit switches and auxiliary lowering system
• Inspect all decals and warning labels for legibility and placement

As-Needed Maintenance

• Replace worn tires or outriggers as needed
• Replace battery if it fails voltage hold or exhibits terminal corrosion
• Repair or replace hydraulic hoses showing wear, abrasion, or leaks
• Update platform software if fault codes appear

Final Maintenance Recommendations

Regular maintenance keeps your Genie GS-4390 RT operating safely and efficiently. For a full range of Genie 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.