GRASSHOPPER 524V42 Service Manual
General information and safety
Overview and audience: This section is intended for trained technicians and informed operators who service the GRASSHOPPER 524V42 mower. It provides foundational knowledge about the machine's design, typical operating conditions, and the essential procedures required to perform maintenance and minor repairs safely. The intended readers should already have a basic understanding of small engine systems, electrical safety, and hand-tool usage. While this manual focuses on the 524V42 model, many principles are applicable to similar GRASSHOPPER platforms, and readers should consult model-specific data if discrepancies arise. Proper adherence to the guidelines herein helps ensure reliable operation, extends component life, and reduces the risk of injury during service activities.
Safety precautions and PPE requirements: Before any service work, disconnect the spark plug boot and remove the battery to prevent accidental starting. Wear appropriate PPE, including cut-resistant gloves, safety goggles or a face shield, and sturdy, non-slip footwear. Use hearing protection when operating or testing the machine in environments with elevated noise levels, such as engine runs or air-filter service. When lifting or supporting the mower, utilize jack stands or a commercial-grade lift, and never rely on jacks alone to hold the machine aloft. In addition, work in a well-ventilated area when servicing fuel and exhaust systems to avoid inhalation of fumes and vapors, and always extinguish any open flames or sources of ignition near gasoline or solvents.
Knowledge of the machine's system layout is critical for safe and effective maintenance. Identify and understand the locations of the engine, fuel system, electrical harnesses, cutting deck, belt drives, and safety interlocks. Confirm the presence and condition of guards, shields, and access panels before beginning any work. If a fastener or component appears damaged or excessively worn, replace it with OEM-compatible parts and avoid improvised repairs that could compromise safety or performance. Finally, maintain a clean work area and properly dispose of used fluids and consumables according to local regulations to prevent environmental contamination.
Specifications and tools
The GRASSHOPPER 524V42 is designed to deliver reliable performance across a range of mowing conditions, with a focus on durability and serviceability. This section consolidates the core electrical and mechanical specifications, lubrication intervals, and component coverage essential for accurate diagnostics and timely maintenance. The model supports standard propulsion and cutting configurations that align with common yard maintenance tasks, ensuring compatibility with widely available replacement parts. Operators should note the engine displacement, power output, fuel type, and emission controls as these factors influence maintenance schedules and performance expectations. Verifying these specifications against the initial owner’s manual or equipment serial plate helps prevent misapplication of parts and ensures proper calibration during service.
The service coverage for the 524V42 includes the engine, transmission, cutting deck, chassis, and electrical system. Critical data such as torque zones, normal operating temperatures, and lubricant viscosities are outlined to guide technicians during inspections and tighten-down procedures. The manual emphasizes compliance with manufacturer-recommended service intervals, which typically involve routine checks of the air filtration system, cooling passages, and fuel delivery components. Understanding the specified service window for hydraulic fluid, belt replacements, and safety interlocks is essential to maintaining peak performance and safety. By adhering to these specifications, a technician can diagnose issues more accurately and avoid unnecessary part replacements.
Required tools and service identifiers focus on the standardized diagnostic and maintenance kit necessary for efficient upkeep. This includes torque wrenches within a defined range, precision screwdrivers, spark plug tools, and calibrated leak-down testers where applicable. A digital multimeter is recommended for electrical fault-finding, while a都 segment of the service identifiers covers model-specific connectors, harness routes, and grounding points. Identifying the correct part numbers through the tool identifiers prevents cross-application errors and ensures compatibility with the 524V42’s engines, transmissions, and safety systems. Maintaining an organized toolkit and a current parts catalog streamlines service workflows and reduces downtime during maintenance.
In addition to core tools, expect to encounter specialized items such as deck spindle aligners, belt tension gauges, and coolant level indicators. The specifications section also highlights personal protective equipment requirements and safe handling practices for fluids and bearings. Properly documenting every maintenance action, including timestamped inspections and part substitutions, aids traceability and future troubleshooting. For technicians servicing multiple units, a standardized checklist aligned with these specifications promotes consistent results and supports warranty compliance.
Maintenance procedures
Regular maintenance schedule and checklists A systematic maintenance routine is essential to ensure the reliability and longevity of the GRASSHOPPER 524V42. Establish a regular schedule that aligns with operating hours and environmental conditions, and maintain a detailed log of all tasks performed, replacements, and observations. The routine should include daily quick checks, such as visual inspections for leaks, loose fasteners, and unusual noises, followed by more thorough inspections at specified intervals. Create checklists that cover the condition of the engine, transmission, drive system, deck and blades, electrical connections, and safety devices. Prioritize tasks based on criticality and typical wear patterns, and always document any deviations or parts requiring replacement to support accurate maintenance planning and warranty compliance. Lubrication and fluid service procedures Proper lubrication and fluid management are vital for optimal performance and reduced wear. Use only the recommended lubricants and fluids as specified by the manufacturer, and adhere to precise capacity measurements during replenishment. Regularly inspect and replenish engine oil, hydraulic fluid, transmission oil, and coolant to the appropriate levels, and replace filters according to the maintenance schedule. When performing lubrication, clean the resevoirs and access points before opening them to minimize contamination. For hinged or rotating components, apply the specified lubricants at prescribed intervals and avoid over-lubrication, which can attract dirt and create performance issues. After servicing fluids, run the machine under no-load conditions briefly to purge air and verify proper pressure and temperature readings. Air filter and cooling system service A clean air intake and effective cooling are essential for consistent engine performance and longevity. Inspect the air filter element for dust, oil saturation, and damage, replacing it if signs of wear are evident or if indicated by service intervals. Clean or replace air ducts and ensure the intake path is free of obstructions to maintain efficient airflow. The cooling system requires regular inspection for radiator fins, hoses, clamps, and coolant level. Remove debris from fins with care to avoid bending or damaging them, and check hoses for cracks or soft spots. Replace coolant according to the prescribed schedule, using the correct mixture ratio and approved additives, and ensure the expansion tank is properly secured and vented. Periodically perform a pressure test on the cooling system to identify leaks, and verify that the thermostat operates within the specified temperature range. Fuel system inspection and cleaning The fuel system should be kept free of contaminants to prevent poor performance and potential engine damage. Inspect fuel lines for cracks, leaks, and proper routing, and replace any worn or damaged components. Check the fuel filter and replace it at recommended intervals or when there are indications of restricted flow or contamination. If there are signs of water in the fuel, drain the water separator and replace the filter, and consider a fuel system clean or carburetor service if performance issues persist. Inspect the fuel tank for rust or sediment and clean as needed, using appropriate cleaners and ensuring no spills affect nearby components. After servicing, prime the fuel system and verify that the engine starts smoothly and runs within normal operating parameters. Battery and electrical system maintenance A reliable electrical system ensures safe and consistent operation of all controls and safety features. Inspect battery terminals for corrosion and ensure tight, clean connections. Check the battery state of charge and replace any cells showing significant capacity loss or failure. Examine wiring harnesses for worn insulation, chafing, or damage, and repair or replace as necessary. Test safety interlocks, switches, and fuses to confirm proper operation, and verify charging system output against the manufacturer’s specifications. Keep electrical connections dry and free from dirt, and protect exposed wiring from vibration and heat sources to avoid premature wear. Periodic electrical diagnostics with the proper equipment can detect intermittent faults before they affect performance, enabling proactive maintenance planning.Disassembly safety considerations require meticulous preparation before any work on the Grasshopper 524V42. Begin by disconnecting the power source and removing the key to prevent accidental startup. Wear appropriate personal protective equipment, including cut-resistant gloves, eye protection, and sturdy footwear. Use a clean, well-lit work area with a stable surface and organize fasteners and small parts in labeled containers. Document each step with photos or notes to ensure accurate reassembly, and apply a consistent labeling system to hoses, wires, and brackets to avoid confusion during later steps. Keep a dedicated magnetic tray for screws and a labeled bag for larger components to maintain order throughout the process.
Chassis and engine cover removal involves unlocking the fasteners in a logical sequence to reduce strain on surrounding components. Start by removing any safety shields or guards that obstruct access, taking care not to bend or stress cooling fins or plastic mounts. Carefully detach the battery connection if present, ensuring no residual charge remains in capacitors. Remove the engine cover bolts in a crisscross pattern to evenly relieve the cover’s tension, then lift the cover straight up to avoid interference with the intake or exhaust plumbing. Inspect the gasket surfaces for damage or debris and replace any worn seals before proceeding to access the engine internals. Maintain a record of torque values for removable brackets so that reassembly restores the original clamping force and alignment.
Key components replacement procedures require a methodical approach to avoid damage to delicate parts. When replacing the air filter, remove the housing clamps evenly and inspect the filter for cracks or embedded debris. If replacing the spark plug, disconnect the ignition wire with a firm, straight pull to avoid wire insulation damage, and use the correctly sized spark plug socket to prevent thread cross-threading. For fuel system components, relieve any pressure from the line before disconnecting, and install any new lines or fittings with compatible thread compounds or gaskets as specified by the manufacturer. When replacing the drive belt or pulleys, measure belt deflection and tension according to the service manual, and verify that pulleys rotate freely without wobble. Document each replaced part with the corresponding service date and mileage to support future maintenance planning.
Reassembly verification and testing should begin with a clean, orderly layout of all removed components. Refit the engine cover and safety shields in the reverse order of removal, ensuring all fasteners seat evenly and to the correct torque values. Reconnect electrical harnesses with attention to correct routing to prevent chafing or interference with moving parts. Reinstall the air intake and fuel lines, checking for secure clamps and proper routing around hot surfaces. After initial torqueing of major fasteners, perform a cranking test to confirm no abnormal noises or leaks before full operation. Finally, conduct a field test with the grass catcher engaged and the blades running at low, medium, and high speeds to verify proper engagement, cooling, and overall performance, documenting any irregularities for further inspection.
Engines and power transmission
The Grasshopper 524V42 is equipped with a compact, high-efficiency engine designed for reliable performance in demanding mowing and landscaping tasks. Key specifications include horsepower output, displacement, and recommended operating ranges that ensure smooth operation under load. Proper handling and maintenance of the engine help maintain consistent cutting performance and extend the life of both the engine and attached implements. Regularly reviewing service intervals and oil requirements ensures the machine runs at peak efficiency and reduces the risk of unexpected downtime. Always consult the manufacturer’s data plate and service manual for model-specific values and procedures to avoid incorrect maintenance actions.
Engine maintenance begins with a clean service environment and the use of manufacturer-approved parts and consumables. Periodic checks should cover the air filter, fuel filter, oil level, and cooling system to prevent overheating and loss of power. Maintaining clean fuel and proper fuel quality is essential for optimum combustion and engine longevity. When performing maintenance, ensure the engine is cool, disconnect the spark plug or power source as applicable, and follow lockout/tagout procedures to prevent accidental starts. Document any deviations from normal operation and schedule corrective actions promptly to preserve efficiency and reliability.
Fuel system maintenance and repair involves inspecting the fuel lines, filters, and tank for signs of wear, cracks, or contamination. Replace filters according to the prescribed interval and use the recommended fuel grade to avoid varnish buildup and fuel system clogging. If fuel delivery is inconsistent, check for air leaks, degraded hoses, or a compromised fuel pump. When repairing or replacing components, ensure fittings are torqued to the manufacturer’s specifications to prevent leaks and ensure proper fuel pressure. After any service, purge air from the system and test run the engine under load to verify stable operation and ignition timing.
Ignition system inspection and replacement require careful verification of spark timing, spark plug condition, and wiring integrity. Remove and inspect spark plugs for fouling, wear, or recessed gaps; replace as specified and gap to the manufacturer’s recommended clearance. Inspect ignition coils and leads for cracks, corrosion, or loose connections, replacing any damaged parts to prevent misfires. If starting problems persist, use manufacturer-approved diagnostic procedures to test for ignition coil resistance and coil-to-spark plug continuity. After completing ignition work, perform a controlled engine start and observe for smooth firing, consistent idle, and uniform acceleration, addressing any abnormal noises or misfiring immediately.
Exhaust and emission control considerations focus on ensuring complete exhaust flow and compliant emission performance. Inspect exhaust connections for leaks, cracks, or loose clamps and replace damaged components to prevent heat buildup and potential fire hazards. Check the muffler and catalytic or emission control devices for blockages or deterioration and replace as required to maintain proper back pressure and emission limits. Regularly inspect the exhaust system for signs of excessive soot, oil contamination, or unusual noise, which can indicate underlying engine issues. Ensure that all shields and heat barriers are in place to protect nearby components and the operator from heat exposure and noise.
Transmission and drive systems maintenance emphasizes the health of belts, clutches, hydraulic or belt-driven transmissions, and drive axles. Inspect belts for wear, cracks, or glazing and replace them according to the service schedule to maintain proper tension and power transfer. Check clutch assemblies for smooth engagement, proper slip, and even wear, replacing worn components to prevent slippage and overheating. If the machine uses a hydraulic drive system, monitor hydraulic fluid levels, filter cleanliness, and line integrity; look for leaks and repair them promptly to avoid pressure loss. Regularly inspect drive shafts, joints, and support bearings for looseness or abnormal movement, tightening or replacing as needed to ensure safe and efficient operation.
Throughout all maintenance activities, adhere to safety protocols, use the correct tools, and dispose of fluids and worn parts according to local regulations. Keeping a detailed maintenance log with dates, performed tasks, and replaced components helps track service history and plan future interventions. Before returning the equipment to service, perform a test run to verify that all systems operate within specified parameters, listening for unusual noises, checking for leaks, and confirming that the machine travels and pivots correctly without excessive vibration. By maintaining the engine and power transmission systems diligently, owners can maximize reliability, efficiency, and the overall service life of the Grasshopper 524V42.
Cooling systems in outdoor power equipment like the Grasshopper 524V42 are critical for maintaining engine performance and longevity. Regular inspection and servicing help prevent overheating, which can lead to reduced power, accelerated wear, and potential engine damage. Begin by verifying that the radiator fins are free of obstructions such as grass clippings, dust, and debris. Use a soft brush and compressed air to clean between the fins without bending them, ensuring unrestricted airflow. Check the coolant level if the engine uses a liquid cooling system, and inspect for any signs of leaks at hoses, clamps, and the radiator core. Ensure the radiator cap is seated correctly and rated for the system’s pressure to prevent accidental loss of coolant. Monitor operating temperatures during test runs to confirm that the cooling system maintains a consistent level within the manufacturer’s specified range.
Radiator and hoses are essential to efficient heat transfer and must be inspected routinely for integrity. Inspect the radiator for any bent fins, cracks, or signs of corrosion that could impede cooling performance. Inspect the supply and return hoses for cracks, fraying, bulges, or soft spots that indicate aging or damage. Secure all hose clamps and connections to prevent leaks under pressure. When hoses show signs of degradation, replace them with OEM-specified parts to maintain proper cooling flow and system pressure. After reinstalling hoses, perform a pressure test or coolant fill-and-bleed procedure as recommended by the service manual to remove air pockets. Keep an eye on hose routing to ensure there is no contact with hot surfaces or moving components that could cause wear over time.
Exhaust system checks and repairs are necessary to control exhaust emissions, reduce noise, and prevent backpressure issues that can affect engine performance. Start with a visual inspection of the muffler, exhaust pipe, and all mounts for cracks, holes, or looseness. Listen for unusual noises such as rattling or exhaust leaks during operations, which can indicate loose fittings or damaged gaskets. Inspect gaskets and clamps for tightness and integrity; replace any degraded gaskets to restore proper sealing. Check for signs of exhaust leaks around the manifold and connections, which can present a health hazard and reduce engine efficiency. If restrictions are suspected due to soot buildup or corrosion, perform a careful, manufacturer-approved cleaning or component replacement as required. Always follow local environmental regulations when handling exhaust components and disposing of any replaced parts.
The GRASSHOPPER 524V42 employs a standard 12-volt electrical architecture designed for reliability in harsh working environments. The system integrates a robust battery, charging circuit, ignition switch, starter solenoid, and a collection of relays that control essential functions such as engine ignition, safety interlocks, and accessory circuits. All wiring is color-coded and routed to minimize exposure to heat, vibration, and moisture. When diagnosing electrical issues, begin with a visual inspection for damaged insulation, corrosion at ground points, and any signs of moisture ingress in connectors. A well-maintained system should show clean voltage readings at the battery posts and a steady ground reference at the frame to ensure proper sensor and actuator operation.
The wiring harness routing and protection are critical for longevity in outdoor conditions. Harnesses are routed along the chassis with protective convoluted tubing and secured using high-load clamps to prevent chafing during operation. Critical segments near the engine, fuel system, and hot surfaces are shielded with metal or heat-resistant sleeves to resist abrasion and thermal degradation. Harness routes avoid moving parts and hot surfaces, and junctions utilize weatherproof connectors to maintain reliability in rain, dew, or dust. When inspecting the harness, check for pin damage, loose crimps, and any signs of water intrusion at connectors, especially those exposed to the elements. Replace any compromised sections with OEM-approved harnesses and re-seal all weatherproof joints after service.
Component location guides provide a practical map for service tasks. The battery sits in a dedicated tray with a vented cover and a secure hold-down; observe the correct orientation to ensure proper venting and access. The ignition switch is mounted on the dash panel and linked to the starter solenoid through a heavy-gauge lead; ensure contacts are clean and tight for reliable cranking. The charging system includes a stator or alternator, a diode or regulator assembly, and associated wiring that feeds the battery while the engine runs. Ground points are located at the engine block, chassis frame, and battery negative terminal, all of which should show low resistance on a multimeter. For efficient troubleshooting, document each connector’s color and pinout before disconnecting anything, so you can rapidly restore the correct wiring geometry after testing.
Replacement and repair procedures follow tested, manufacturer-approved methods to ensure safety and performance. When replacing fuses or relays, use OEM-rated parts and verify the circuit amperage to avoid overloading the harness. If a faulty ignition switch is suspected, disconnect power, verify continuity across the switch terminals with a multimeter, and replace only with an equivalent rated unit. Damaged connectors should be replaced or repaired with correct crimp terminals and heat-shrink insulation to restore environmental sealing. Any suspected short or open circuit must be traced from the battery through the harness using a systematic approach, starting at the power source and moving toward each load, while monitoring voltage drop to identify hidden faults. After any electrical work, perform a functional test of all critical safety interlocks and ensure that the engine starts reliably under load, with no abnormal heating or unusual sounds coming from the wiring areas.
Attachments and implements
The Grasshopper 524V42 is designed to work with a variety of attachments and implements to extend capabilities beyond mowing. When selecting attachments, ensure compatibility with the 524V42’s electrical, hydraulic, and frame specifications. Verify that the attachment’s weight distribution does not exceed the manufacturer’s recommended limits for the chassis to prevent undue stress on the suspension, axles, or deck mounting points. Before installation, inspect all mounting hardware for wear, corrosion, or deformation and replace any compromised components to maintain safe and reliable operation. Always consult the specific attachment’s installation guide in conjunction with the mower’s service manual to confirm proper mounting procedures and torque specifications. Mower deck service and adjustment Routine mower deck maintenance is essential for consistent cutting performance and even grass distribution. Start by inspecting the deck for cracks, bends, or loose welds that could affect belt alignment or deck height. Remove the belt guard and carefully rotate the blades by hand to check for blade runout, unusual wobble, or bearing play; replace bearings or the entire blade assembly if excess movement is detected. Check the spindle housings for lubrication needs and signs of seal leaks; replenish or replace lubricants per the manufacturer’s recommended intervals to prevent overheating and premature wear. Adjust the deck cutting height using the front and rear caster wheel settings to achieve an even plane across the full width of the deck, ensuring consistent mulch or bagging performance. Regularly inspect the deck’s anti-scalp rollers and ensure they are properly positioned to prevent scalping on uneven terrain. Attachment installation and compatibility Attachment installation requires careful alignment to the mower’s hitch points, power take-off (if applicable), and hydraulic connections. Begin by ensuring the mower is on a level surface and disconnecting the battery or power supply to prevent accidental startup during installation. Align the attachment’s mounting brackets with the mower’s corresponding points, then insert hardware with appropriate spacers and washers to maintain correct spacing and clearance. If the attachment uses hydraulic or electrical connections, verify hose and connector integrity, then perform a functional test at low idle to confirm proper operation without leaks or misfires. For quick-connect attachments, follow the standard sequence of securing mounting pins, locking collars, and safety pins to prevent accidental detachment during operation. After installation, check all linkages, pins, and hoses for secure engagement and proper travel without interference with existing components such as the mower deck, wheels, or drive belts. Blade and cutting system maintenance The blade and cutting system require periodic inspection to maintain cutting performance and prevent rotor imbalance. Remove the battery or disconnect power to ensure safe blade handling, then wear cut-resistant gloves and use a blade wrench to carefully loosen and remove each blade from its spindle. Inspect the cutting edges for nicks, cracks, or excessive dullness; resharpen or replace blades as needed to maintain a balanced cutting action and reduce vibration. Examine the blade mounting bolts for proper torque, using a calibrated torque wrench to the manufacturer’s specified value to prevent loosening during operation. Clean the blade spindles and pulleys to remove grass buildup, dust, and debris that can cause uneven blade rotation or bearing wear. Reinstall blades with the curved side following the direction of rotation and ensure the balance is maintained by using a blade balance tool or the penny test; imbalance can lead to vibration, premature bearing wear, and deck damage. Deck belt and pulley service Belt and pulley maintenance is crucial for transmitting engine power to the cutting deck with minimal slip and heat. Inspect belts for cracks, fraying, or glazing, and replace any that show signs of wear or damage; use OEM parts to ensure proper width and tension. Check each pulley for smooth bearing operation, listening for grinding noises or roughness that would indicate worn bearings or loose mounts. Ensure belt tracking is correct by observing the belt path around each pulley and adjusting belt tensioners or idlers as specified by the service documentation. When removing or replacing belts, carefully route the belt according to the diagram to avoid misrouting that can cause rapid wear or belt derailment. After servicing, perform a belt tension check with the recommended method and recheck all pulleys for alignment and secure mounting to prevent belt failure during operation.Dismantling and hazardous material handling
Hazardous material handling procedures require adherence to established safety practices to protect personnel and the environment. Before any dismantling work begins, ensure that the engine is cool, all fluids are depressurized, and the machine is secured against unintended movement. Wear appropriate personal protective equipment, including chemical-resistant gloves, eye protection, and a long-sleeved, flame-resistant outer layer as dictated by your workplace safety program. Verify that you have access to an approved container for collecting fluids and a secondary containment tray for small parts to prevent spills. It is essential to identify and isolate any components that contain batteries, fuel, coolant, or hydraulic fluids, and to follow the manufacturer’s recommendations for isolation and disconnection procedures. Always document any disconnections with notes or labels to maintain traceability during reassembly or disposal.
During dismantling, work methodically from non-structural to more critical components to minimize the risk of damage and accidental releases. Use the correct tools for each fastener type to avoid stripping bolts or breaking studs, which can complicate disposal or repair. When removing fuel lines, perform the task in a well-ventilated area and use approved containers to capture any residual liquids. If a puncture or leak occurs, stop the operation, contain the spill, and follow the spill response procedures outlined in your safety program. Never mix fluids from different systems, as incompatible fluids can react violently or create hazardous vapors. Ensure that all reusable components are cataloged, while any worn or damaged parts are tagged for separate disposal.
Hazardous material handling procedures extend to the removal and storage of refrigerants, solvents, and ignition systems as applicable to the Grasshopper 524V42 model. Verify that all refrigerants are recovered by a certified technician and that recovery equipment is operated in accordance with environmental regulations. For solvents and degreasers, select products with low volatile organic compound (VOC) content and use in well-ventilated spaces away from ignition sources. Dispose of spent solvents according to local and national regulations, and never pour hazardous liquids down drains or onto the ground. Maintain written records of all quantities recovered and disposed to support regulatory compliance and environmental stewardship.
Waste disposal guidelines require segregation of waste streams at the source to facilitate proper treatment and disposal. Convert used fluids, battery acids, and contaminated absorbents into clearly labeled containers that are compatible with the substance’s chemical properties. Ensure that any bags or drums used for disposal are secured and leak-proof, with secondary containment to prevent spills during transport. If hazardous waste needs to be shipped off-site, coordinate with a licensed hauler and provide the necessary shipping papers, manifests, and EPA or local equivalents. Regularly review waste handling practices to identify opportunities for reducing hazardous waste generation, such as by selecting longer-lasting components or improving fluid management strategies.
Recycling and environmental considerations emphasize minimizing the ecological footprint of dismantling activities. Separate ferrous and non-ferrous metals, plastics, and composites for recycling whenever feasible, and work with certified recyclers who adhere to recognized environmental standards. When removing batteries or electronic components, follow battery recycling guidelines to prevent acid leaks and thermal runaway, and store them in dedicated, labeled containers. Evaluate the potential for reusing serviceable parts in future repairs to extend equipment life and reduce material consumption. Document environmental performance metrics for the dismantling process, including waste diversion rates and incidents of spills, to support continuous improvement and compliance audits.