Mobil Crane Daily, Weekly, Monthly, Quarterly, Semi annual, Annual preventive maintenance checklists

Daily Maintenance Checklist

  • Walk around the crane to check for dents, scratches, or cracks.
  • Look for any signs of fluid leaks under the crane.
  • Inspect hoses and connections for wear or damage.
  • Ensure all parts are secure and intact.
  • Locate the dipsticks or sight gauges for each fluid type.
  • Ensure oil and hydraulic fluid levels are within acceptable ranges.
  • Check coolant level in the reservoir.
  • Top off any fluids that are low as needed.
  • Examine ropes for fraying, kinks, or broken strands.
  • Check chains for wear, rust, or deformation.
  • Ensure all connections are secure and functioning.
  • Replace any damaged ropes or chains immediately.
  • Activate the horn to ensure it sounds loudly.
  • Turn on all lights to verify they are operational.
  • Test the emergency stop button for proper function.
  • Check warning lights or indicators for any alerts.
  • Operate each control to ensure it responds correctly.
  • Check for any unusual noises during operation.
  • Ensure that all functions can be performed smoothly.
  • Report any issues with controls immediately.
  • Inspect tires for any visible damage or punctures.
  • Check tire pressure using a gauge.
  • Ensure all tires are inflated to the recommended PSI.
  • Look for uneven wear patterns on the tires.
  • Remove any debris or clutter from the cabin.
  • Wipe down surfaces including controls and windows.
  • Check for proper function of the seat and seatbelt.
  • Ensure all emergency equipment is stored correctly.
  • Verify that load charts are up to date and legible.
  • Ensure manuals are in good condition and within reach.
  • Check that all necessary documents are present.
  • Store documents in a designated, easily accessible location.
  • Walk around the crane to check for dents, scratches, or cracks.
  • Look for any signs of fluid leaks under the crane.
  • Inspect hoses and connections for wear or damage.
  • Ensure all parts are secure and intact.
  • Locate the dipsticks or sight gauges for each fluid type.
  • Ensure oil and hydraulic fluid levels are within acceptable ranges.
  • Check coolant level in the reservoir.
  • Top off any fluids that are low as needed.
  • Examine ropes for fraying, kinks, or broken strands.
  • Check chains for wear, rust, or deformation.
  • Ensure all connections are secure and functioning.
  • Replace any damaged ropes or chains immediately.
  • Activate the horn to ensure it sounds loudly.
  • Turn on all lights to verify they are operational.
  • Test the emergency stop button for proper function.
  • Check warning lights or indicators for any alerts.
  • Operate each control to ensure it responds correctly.
  • Check for any unusual noises during operation.
  • Ensure that all functions can be performed smoothly.
  • Report any issues with controls immediately.
  • Inspect tires for any visible damage or punctures.
  • Check tire pressure using a gauge.
  • Ensure all tires are inflated to the recommended PSI.
  • Look for uneven wear patterns on the tires.
  • Remove any debris or clutter from the cabin.
  • Wipe down surfaces including controls and windows.
  • Check for proper function of the seat and seatbelt.
  • Ensure all emergency equipment is stored correctly.
  • Verify that load charts are up to date and legible.
  • Ensure manuals are in good condition and within reach.
  • Check that all necessary documents are present.
  • Store documents in a designated, easily accessible location.

Weekly Maintenance Checklist

  • Examine the crane frame for cracks, corrosion, or damage.
  • Check for any signs of previous repairs or maintenance.
  • Inspect welds and joints for integrity.
  • Look for any obstructions around the crane's working area.
  • Use calibrated weights to test the load monitoring system.
  • Ensure that readings are accurate and within acceptable limits.
  • Document any discrepancies and adjust as necessary.
  • Check connections and wiring for any signs of wear.
  • Examine wiring for fraying, corrosion, or loose connections.
  • Test all circuit breakers and fuses for functionality.
  • Ensure that all electrical components are secure and clean.
  • Look for signs of overheating or burning.
  • Operate the crane and listen for grinding, squeaking, or rattling.
  • Identify the source of any unusual sounds.
  • Document findings and schedule repairs if necessary.
  • Ensure all moving parts are properly lubricated.
  • Check hoses for cracks, bulges, or wear.
  • Inspect connections for signs of leaking fluid.
  • Tighten any loose connections as needed.
  • Replace any damaged hoses immediately.
  • Refer to the manufacturer's manual for lubrication points.
  • Use appropriate lubricants for each component.
  • Ensure that excess lubricant is wiped away.
  • Inspect lubrication points for any signs of wear.
  • Extend and retract outriggers to check for smooth operation.
  • Inspect the stabilizers for wear or damage.
  • Ensure that all safety locks engage properly.
  • Document any issues for follow-up maintenance.
  • Check for completeness of records since last review.
  • Document any maintenance performed during the week.
  • Note any issues that need further attention.
  • Ensure logs are stored in an accessible location.
  • Check for fraying, kinks, or signs of wear on ropes.
  • Test tension using manufacturer-recommended methods.
  • Inspect connections and fittings for integrity.
  • Replace any damaged ropes or chains promptly.
  • Test each safety device to ensure it activates correctly.
  • Check alarm functionality for load limits and emergency stops.
  • Inspect wiring and connections for wear.
  • Document any malfunctions for repair.
  • Test all lights, including work lights and signals.
  • Replace any burnt-out bulbs immediately.
  • Check wiring for any signs of damage.
  • Ensure visibility is not obstructed by debris.
  • Check tire pressure against manufacturer's specifications.
  • Inspect tires for signs of wear, bulges, or cuts.
  • For tracks, check for tension and alignment.
  • Document any necessary replacements.
  • Use appropriate cleaning agents for the crane’s surface.
  • Remove any dirt, grease, or debris from all parts.
  • Ensure that visibility is clear for operators.
  • Check for any foreign objects in the working area.
  • Check that load charts are current and legible.
  • Ensure operational manuals are in the operator's cabin.
  • Replace any missing or outdated documentation.
  • Provide easy access to all necessary information.
  • Activate the emergency stop to confirm it halts all operations.
  • Check that the stop resets correctly afterward.
  • Inspect the emergency stop button for wear.
  • Document the functionality test.
  • Inspect fluid reservoirs for minimum and maximum levels.
  • Top up fluids as needed with the correct type.
  • Check for leaks around seals and connections.
  • Document fluid levels in maintenance logs.
  • Check all controls for functionality and responsiveness.
  • Inspect seating and visibility from the operator's position.
  • Look for wear on buttons, levers, and gauges.
  • Ensure cleanliness for optimal visibility.
  • Inspect the boom for cracks, bends, or corrosion.
  • Check attachment points for integrity and security.
  • Document any signs of structural problems.
  • Schedule repairs if necessary.
  • Check the pressure gauge on fire extinguishers.
  • Ensure extinguishers are easily accessible and unobstructed.
  • Inspect other safety equipment for functionality.
  • Replace any expired safety equipment immediately.
  • Inspect battery terminals for corrosion or loose connections.
  • Check battery charge level and replace if low.
  • Test electrical connections for proper voltage.
  • Document any issues found.
  • Select a test load within safe operating limits.
  • Monitor crane performance during the lift.
  • Check for stability and functionality of controls.
  • Document the results and any concerns.
  • Inspect all visible bolts and fasteners for tightness.
  • Replace any missing fasteners immediately.
  • Document findings and schedule repairs if needed.
  • Ensure all components are securely fastened.
  • Check the load hook for cracks or deformation.
  • Test the safety latch to ensure it engages properly.
  • Inspect the attachment point for wear.
  • Document any necessary repairs.

Monthly Maintenance Checklist

  • Examine boom structure for cracks or deformities.
  • Check attachment points for secure fastening.
  • Assess hydraulic lines and connections for wear.
  • Ensure all moving parts operate smoothly.
  • Inspect all metal surfaces visually.
  • Use a wire brush to check hidden areas.
  • Apply protective coatings as needed.
  • Document any findings for future reference.
  • Look for cracks or deformities in the frame.
  • Check for loose or damaged components.
  • Assess wear on rollers and tracks.
  • Grease any necessary fittings.
  • Conduct a meeting to discuss safety protocols.
  • Reiterate emergency procedures and responses.
  • Encourage feedback on current practices.
  • Document any changes or updates made.
  • Simulate emergency scenarios with appropriate loads.
  • Verify the response time of systems.
  • Check alarms and notifications for functionality.
  • Record results for compliance and review.
  • Test brakes under various load conditions.
  • Check brake fluid levels and quality.
  • Inspect brake pads and discs for wear.
  • Ensure the braking system engages smoothly.
  • Check visibility and legibility of all labels.
  • Replace any damaged or faded labels.
  • Ensure compliance with safety regulations.
  • Document any replacements made.
  • Assess current operator knowledge and skills.
  • Provide additional training sessions if needed.
  • Document training attendance and topics covered.
  • Evaluate effectiveness of training through performance.
  • Look for cracks or bulges on hoses.
  • Check connections for tightness and leaks.
  • Replace any damaged hoses immediately.
  • Document inspections and replacements.
  • Use dipsticks or sight glasses for measurement.
  • Top off any low fluid levels.
  • Dispose of any used fluids according to regulations.
  • Document fluid levels and changes made.
  • Check all wiring for fraying or damage.
  • Inspect connections for corrosion or looseness.
  • Test electrical components for functionality.
  • Document any repairs or replacements made.
  • Perform load tests with calibrated weights.
  • Adjust settings as necessary for accuracy.
  • Document calibration results and procedures.
  • Verify system alerts and notifications.
  • Use a tire pressure gauge to measure PSI.
  • Inspect tires for cuts, cracks, and wear.
  • Rotate tires if necessary for even wear.
  • Document tire conditions and any actions taken.
  • Remove dirt and debris from parts.
  • Apply appropriate lubricants to moving components.
  • Check for excessive wear on pins and bushings.
  • Document cleaning and lubrication processes.
  • Check all controls for responsiveness.
  • Ensure visibility is unobstructed from the cabin.
  • Test seat comfort and adjustability.
  • Document any necessary repairs or adjustments.
  • Ensure counterweights are properly attached.
  • Check for signs of wear on securing devices.
  • Assess overall condition of counterweights.
  • Document inspection findings.
  • Ensure all maintenance activities are logged.
  • Update records with recent inspections and repairs.
  • Verify compliance with regulatory standards.
  • Document any discrepancies for follow-up.
  • Test radios and intercoms for clarity.
  • Check alarm systems for proper operation.
  • Ensure all signals are clear and audible.
  • Document any issues and resolutions.
  • Inspect tools for damage or wear.
  • Organize tools in designated storage areas.
  • Document any missing or damaged equipment.
  • Ensure all tools are cleaned after use.

Quarterly Maintenance Checklist

  • Check for cracks, bends, or corrosion.
  • Inspect welds and joints for integrity.
  • Examine load-bearing elements for wear.
  • Ensure all safety barriers are intact.
  • Document any anomalies or repairs needed.
  • Attach calibrated weights to the hook.
  • Raise and lower the load smoothly.
  • Monitor for any unusual sounds or movements.
  • Verify that the load does not exceed rated capacity.
  • Record test results for future reference.
  • Check wiring for frays or insulation damage.
  • Test all control functions for responsiveness.
  • Inspect hydraulic hoses for leaks or abrasions.
  • Verify fluid levels and refill as necessary.
  • Document any repairs or replacements performed.
  • Collect fluid samples from hydraulic and engine systems.
  • Use appropriate testing kits for analysis.
  • Check for particulates and chemical composition.
  • Compare results against acceptable standards.
  • Schedule fluid changes if contamination is detected.
  • Inspect terminals for corrosion and tightness.
  • Test voltage and charge levels.
  • Clean terminals with a suitable solution.
  • Ensure proper securing of the battery.
  • Replace any weak or damaged batteries.
  • Evaluate current maintenance logs for accuracy.
  • Identify overdue or upcoming maintenance tasks.
  • Adjust schedules based on usage and conditions.
  • Communicate changes to all relevant personnel.
  • Ensure documentation is updated accordingly.
  • Evaluate operator performance through observation.
  • Identify areas requiring improvement or retraining.
  • Schedule training sessions for identified operators.
  • Provide updated manuals and safety materials.
  • Document assessments and training completion.
  • Check slings, hooks, and shackles for damage.
  • Ensure all gear meets regulatory standards.
  • Look for signs of excessive wear or fraying.
  • Replace any non-compliant or damaged gear.
  • Keep records of inspections and replacements.
  • Check for cracks, bends, or corrosion.
  • Inspect welds and joints for integrity.
  • Examine load-bearing elements for wear.
  • Ensure all safety barriers are intact.
  • Document any anomalies or repairs needed.
  • Attach calibrated weights to the hook.
  • Raise and lower the load smoothly.
  • Monitor for any unusual sounds or movements.
  • Verify that the load does not exceed rated capacity.
  • Record test results for future reference.
  • Check wiring for frays or insulation damage.
  • Test all control functions for responsiveness.
  • Inspect hydraulic hoses for leaks or abrasions.
  • Verify fluid levels and refill as necessary.
  • Document any repairs or replacements performed.
  • Collect fluid samples from hydraulic and engine systems.
  • Use appropriate testing kits for analysis.
  • Check for particulates and chemical composition.
  • Compare results against acceptable standards.
  • Schedule fluid changes if contamination is detected.
  • Inspect terminals for corrosion and tightness.
  • Test voltage and charge levels.
  • Clean terminals with a suitable solution.
  • Ensure proper securing of the battery.
  • Replace any weak or damaged batteries.
  • Evaluate current maintenance logs for accuracy.
  • Identify overdue or upcoming maintenance tasks.
  • Adjust schedules based on usage and conditions.
  • Communicate changes to all relevant personnel.
  • Ensure documentation is updated accordingly.
  • Evaluate operator performance through observation.
  • Identify areas requiring improvement or retraining.
  • Schedule training sessions for identified operators.
  • Provide updated manuals and safety materials.
  • Document assessments and training completion.
  • Check slings, hooks, and shackles for damage.
  • Ensure all gear meets regulatory standards.
  • Look for signs of excessive wear or fraying.
  • Replace any non-compliant or damaged gear.
  • Keep records of inspections and replacements.

Semi-Annual Maintenance Checklist

  • Schedule review appointment with a certified technician.
  • Prepare all relevant maintenance records for review.
  • Discuss any concerns or unusual behaviors observed.
  • Ensure technician has access to the crane for inspection.
  • Document findings and recommendations.
  • Check fluid levels and top off as needed.
  • Inspect belts and hoses for wear or damage.
  • Change oil and replace oil filter.
  • Test engine performance and listen for unusual sounds.
  • Ensure proper operation of the transmission.
  • Identify hydraulic filter locations and ensure compatibility.
  • Drain old hydraulic fluid and properly dispose of it.
  • Install new filters and fill with fresh hydraulic fluid.
  • Check for leaks after replacing filters.
  • Document fluid change in maintenance records.
  • Test all emergency and safety alarms.
  • Inspect safety devices for proper operation.
  • Check operator safety harnesses and provisions.
  • Verify functionality of emergency stop buttons.
  • Document any safety issues and corrective actions.
  • Check radio communication devices for clarity.
  • Test intercom systems between operator and ground crew.
  • Inspect wiring and connections for damage.
  • Replace any non-functional communication equipment.
  • Document results of the communication test.
  • Examine gears, pulleys, and bearings for wear.
  • Lubricate moving parts as per manufacturer guidelines.
  • Check for any unusual noises during operation.
  • Replace worn or damaged components.
  • Document service performed on mechanical components.
  • Obtain the latest local safety regulations.
  • Compare current crane specifications with requirements.
  • Identify any non-compliance issues.
  • Take corrective actions for non-compliance.
  • Document compliance review findings.
  • Ensure all recent maintenance activities are logged.
  • Record dates and details of all inspections.
  • File documents in an organized manner.
  • Verify accuracy of all recorded information.
  • Review records for completeness.
  • Check calibration settings against manufacturer specifications.
  • Test load monitoring systems under operational conditions.
  • Adjust settings as necessary for accurate readings.
  • Document calibration results and adjustments made.
  • Schedule regular calibration checks moving forward.
  • Inspect all wiring for frays or damage.
  • Test battery voltage and connections.
  • Check fuses and replace any burnt-out fuses.
  • Ensure all electrical systems are properly grounded.
  • Document any electrical issues found.
  • Inspect boom for structural integrity and wear.
  • Test hoist mechanisms to ensure smooth operation.
  • Adjust tensions and alignments as required.
  • Lubricate moving parts of the boom and hoist.
  • Document adjustments made during inspection.
  • Examine wire ropes for fraying or kinking.
  • Check chains for elongation and wear signs.
  • Replace any damaged ropes or chains immediately.
  • Document inspection findings and replacements.
  • Schedule regular inspections for rope and chain integrity.
  • Inspect chassis for rust and corrosion signs.
  • Check welds and joints for structural integrity.
  • Apply protective coatings where necessary.
  • Document any corrosion found and corrective actions taken.
  • Ensure all structural components meet safety standards.
  • Test each outrigger for proper deployment.
  • Check stability when outriggers are extended.
  • Inspect hydraulic lines for leaks or damage.
  • Document any issues with deployment or stability.
  • Schedule repairs if deployment issues are found.
  • Inspect paint for chips, cracks, and peeling.
  • Identify areas needing touch-ups or repainting.
  • Check protective coatings for effectiveness.
  • Document the condition of paint and coatings.
  • Schedule repainting or touch-ups as needed.
  • Check radiator for debris and blockages.
  • Clean fans and ensure they operate correctly.
  • Inspect coolant levels and top off if low.
  • Look for leaks in cooling lines or connections.
  • Document any maintenance performed on the cooling system.
  • Check expiration dates on operator certifications.
  • Verify completion of required training programs.
  • Schedule training sessions for any expired certifications.
  • Document training records and compliance status.
  • Ensure all personnel are aware of training requirements.
  • Inspect tires for wear, cracks, or bulges.
  • Check tread depth and inflation levels.
  • Inspect tracks for damage or misalignment.
  • Schedule replacements for any damaged tires or tracks.
  • Document evaluations and any replacements made.
  • Inspect all hydraulic lines for signs of leakage.
  • Check seals and fittings for tightness.
  • Repair or replace any leaking lines or seals.
  • Test hydraulic system after repairs to ensure functionality.
  • Document any leaks found and repairs performed.
  • Conduct tests on emergency stop buttons.
  • Verify response time of shutdown systems.
  • Inspect circuits related to emergency systems.
  • Document any failures or issues identified.
  • Schedule repairs for non-functional emergency systems.
  • Review inventory levels of spare parts.
  • Identify parts that need replenishment.
  • Order required spare parts and supplies.
  • Document inventory changes and restocking actions.
  • Schedule regular inventory assessments.
  • Analyze usage data to determine maintenance frequency.
  • Adjust maintenance schedule based on performance metrics.
  • Document any changes made to the schedule.
  • Inform all relevant personnel of updates.
  • Regularly review schedule for ongoing adjustments.

Annual Maintenance Checklist

  • Refer to the manufacturer’s service manual.
  • Inspect all major components including engines and transmissions.
  • Clean and replace filters as specified.
  • Check fluid levels and top off as necessary.
  • Test all systems to ensure proper operation.
  • Use appropriate NDT methods (e.g., ultrasonic, magnetic particle).
  • Inspect welds, joints, and critical stress points.
  • Document all findings and report anomalies.
  • Schedule repairs for any identified weaknesses.
  • Ensure compliance with industry standards.
  • Identify parts showing signs of wear or damage.
  • Source replacement parts from approved vendors.
  • Follow manufacturer specifications for installation.
  • Document all replacements in maintenance records.
  • Test equipment after replacements to ensure functionality.
  • Compare current procedures with the latest manufacturer guidelines.
  • Incorporate any new safety regulations or best practices.
  • Ensure all operators have access to the updated manual.
  • Provide training on any new procedures.
  • Document the revision date and changes made.
  • Prepare a training agenda covering all relevant topics.
  • Include updates on new equipment or procedures.
  • Utilize hands-on demonstrations for practical understanding.
  • Assess operator knowledge through a quiz or practical test.
  • Document attendance and feedback for future improvements.
  • Collect data on crane usage, load handling, and downtime.
  • Identify trends or patterns indicating performance issues.
  • Develop action plans to address inefficiencies.
  • Share findings with management and operational teams.
  • Set benchmarks for future performance evaluations.
  • Review manufacturer recommendations for upgrades.
  • Assess the current performance and identify areas for improvement.
  • Plan upgrades during low operational periods.
  • Coordinate with vendors for necessary parts or services.
  • Document all upgrades and their expected benefits.
  • Check the expiration dates of all certifications.
  • Schedule inspections with certified professionals.
  • Maintain records of all certificates and inspection reports.
  • Ensure compliance with local regulations.
  • Notify operators of any upcoming deadlines.
  • Refer to the manufacturer’s service manual.
  • Inspect all major components including engines and transmissions.
  • Clean and replace filters as specified.
  • Check fluid levels and top off as necessary.
  • Test all systems to ensure proper operation.
  • Use appropriate NDT methods (e.g., ultrasonic, magnetic particle).
  • Inspect welds, joints, and critical stress points.
  • Document all findings and report anomalies.
  • Schedule repairs for any identified weaknesses.
  • Ensure compliance with industry standards.
  • Identify parts showing signs of wear or damage.
  • Source replacement parts from approved vendors.
  • Follow manufacturer specifications for installation.
  • Document all replacements in maintenance records.
  • Test equipment after replacements to ensure functionality.
  • Compare current procedures with the latest manufacturer guidelines.
  • Incorporate any new safety regulations or best practices.
  • Ensure all operators have access to the updated manual.
  • Provide training on any new procedures.
  • Document the revision date and changes made.
  • Prepare a training agenda covering all relevant topics.
  • Include updates on new equipment or procedures.
  • Utilize hands-on demonstrations for practical understanding.
  • Assess operator knowledge through a quiz or practical test.
  • Document attendance and feedback for future improvements.
  • Collect data on crane usage, load handling, and downtime.
  • Identify trends or patterns indicating performance issues.
  • Develop action plans to address inefficiencies.
  • Share findings with management and operational teams.
  • Set benchmarks for future performance evaluations.
  • Review manufacturer recommendations for upgrades.
  • Assess the current performance and identify areas for improvement.
  • Plan upgrades during low operational periods.
  • Coordinate with vendors for necessary parts or services.
  • Document all upgrades and their expected benefits.
  • Check the expiration dates of all certifications.
  • Schedule inspections with certified professionals.
  • Maintain records of all certificates and inspection reports.
  • Ensure compliance with local regulations.
  • Notify operators of any upcoming deadlines.
  • Check hoses, fittings, and cylinders for signs of leaks.
  • Inspect fluid levels and quality in hydraulic tanks.
  • Test system pressure and responsiveness.
  • Replace any damaged or worn hydraulic components.
  • Document inspection results and any repairs made.
  • Conduct visual inspections for frayed wires or corrosion.
  • Test all switches and circuit breakers for functionality.
  • Verify control panel indicators are operational.
  • Document any electrical issues and corrective actions.
  • Ensure compliance with electrical safety standards.
  • Test the functionality of all safety devices.
  • Calibrate load indicators according to manufacturer specifications.
  • Inspect limit switches for proper operation.
  • Document calibration results and any adjustments made.
  • Ensure operators are familiar with safety device functions.
  • Examine the boom for cracks, bends, or other damage.
  • Check all connections and joints for integrity.
  • Clean and lubricate moving parts as needed.
  • Ensure boom alignment is correct.
  • Document inspection findings and maintenance actions.
  • Check tire tread depth and look for uneven wear.
  • Inspect tracks for damage or debris buildup.
  • Ensure proper inflation levels are maintained.
  • Replace tires or repair tracks as necessary.
  • Document inspection results and any corrective measures.
  • Refer to the manufacturer’s lubrication schedule.
  • Use the correct type and amount of lubricant.
  • Lubricate all specified joints, bearings, and gears.
  • Inspect for any signs of wear or damage during lubrication.
  • Document all lubrication activities and materials used.
  • Inspect fire extinguishers for accessibility and pressure.
  • Check first aid kits for completeness and expiration dates.
  • Test alarms and emergency shut-off systems.
  • Ensure that safety signage is visible and legible.
  • Document equipment status and any replacements needed.
  • Identify any new hazards since the last assessment.
  • Consult operators for feedback on potential risks.
  • Update hazard documentation to reflect current conditions.
  • Implement necessary safety measures or training.
  • Distribute updated hazard assessments to all personnel.
  • Check seat adjustability and comfort for operators.
  • Inspect visibility from the operator's position.
  • Test controls and instruments for proper operation.
  • Ensure cabin cleanliness and organization.
  • Document any issues and corrective actions taken.
  • Create a detailed report of inspections and repairs.
  • Include dates, personnel involved, and parts used.
  • Store documentation in a secure and accessible location.
  • Ensure compliance with regulatory record-keeping requirements.
  • Review documentation periodically for trends in maintenance needs.

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