The daily pre-shift inspection of the electric transfer cart is a compulsory standardized workflow that every operator must strictly implement before starting each shift's production tasks. This inspection aims to fully verify that the whole heavy-duty transfer equipment stays in a safe, stable and reliable working state prior to material transportation. By carrying out this check carefully, operators can identify hidden risks and incipient equipment faults in the early stage instead of waiting for sudden breakdowns during operation. It effectively helps avoid unplanned production downtime, cuts the risk of workshop safety incidents related to heavy cargo handling, slows down component wear and extends the overall service life of the electric transfer cart. Every inspection item needs to be checked one by one with real conditions recorded truthfully on the inspection sheet. Operators are prohibited from starting or driving the transfer cart once any critical defect or unsafe condition is discovered during the check.
Pre-Shift Daily Inspection Checklist
1. Appearance & Structural Parts
Take a full visual check over the entire cart frame, cargo platform, front and rear bumpers and protective guard plates. Look closely for visible cracks, permanent deformation, fractured welding seams, surface corrosion and rust spots, as well as loose or missing fastening bolts on all structural connection positions. Make sure the top surface of the loading platform remains flat and clean without sharp burrs, protruding sundries or damaged fixing lugs used for securing workpieces and cargo. Examine polyurethane wheels or steel load wheels one by one to check for excessive tread abrasion, surface cracks, rubber delamination, loose wheel hubs and abnormal axial clearance that may cause shaking during travelling. Go through the steering assembly, suspension structure and wheel support brackets to confirm there is no bending deformation and all fasteners are tightly locked without loosening after long-time heavy load operation.
2. Power System
Carefully examine the outer shell of the battery pack to rule out shell damage, electrolyte leakage, battery bulging and corrosion traces on the electrode terminals. Check all battery cable connectors to ensure firm connection, no overheating burn marks, broken copper strands and peeled insulation layers which may trigger short circuit or power loss. Read the battery voltage value and confirm the remaining power is sufficient to support continuous transportation work throughout the whole shift. If it is a low-voltage rail powered transfer cart, inspect the power supply rail surface and current collector shoe, checking for severe abrasion, loose installation and potential short-circuit hazards caused by accumulated metal scraps. Finally test the emergency power-off function to guarantee it can cut off the main power supply instantly once triggered under emergency situations.
3. Drive & Motor System
Inspect the traction motor, gearbox and reducer assembly. Check the lubricating oil level inside the reducer and watch for oil seepage or leakage at sealing surfaces, while listening for abnormal rumbling, scraping or knocking noise. Check drive shafts and shaft couplings to confirm all locking bolts are fastened tightly and there is no offset or gap between connecting parts. Manually jog the drive unit for a short test before formal operation and listen carefully for abnormal friction sound inside the transmission structure. Keep the motor cooling area clean and verify that cooling fins or ventilation openings are not blocked by dust, metal powder and debris, which would lead to poor heat dissipation and motor overheating failure.
4. Control System & Electrical Components
Open the electrical cabinet and inspect internal components including PLC unit, motor controller, contactors and terminal blocks. Check for burnt odour, melted plastic traces and loose wiring terminals. Route through all power cables and hydraulic/air hoses on the cart body to confirm insulation layers stay intact, without extrusion wear, pinch damage and exposed conductive wires. Test the main control panel, physical push buttons and indicator lights one by one to ensure every signal responds accurately and indicator lamps display status correctly. Test both wireless remote controller and pendant control box separately, confirm their built-in batteries have enough power, all function buttons are sensitive and control signals stay stable without frequent signal loss or external signal interference. Pay special attention to the emergency stop button, the core safety component; after pressing, it should cut the drive power immediately and can be reset smoothly to resume the system when danger is removed.
5. Braking System
Conduct functional tests for both service brake and emergency brake, making sure the braking force is stable enough to stop the loaded cart reliably without slipping or slow stopping. Check the wear thickness of brake pads and brake discs to confirm they are still within the allowable wear range and do not need immediate replacement. Inspect brake connecting rods, return springs and brake actuators to ensure these mechanical parts keep intact, free from bending deformation, jamming and spring fatigue that will weaken braking performance under heavy load.
