Standard Operating Procedure: Weekly Preventive Maintenance (WPM)

Introduction

The purpose of this Standard Operating Procedure (SOP) is to standardize the weekly preventive maintenance (WPM) process to ensure operational continuity, minimize unscheduled downtime, and extend the lifespan of critical infrastructure. This procedure applies to all facility equipment and systems identified as high-priority. Consistent execution of these tasks is mandatory for all maintenance staff to maintain safety standards and uphold our operational performance metrics.

Step-by-Step Weekly Maintenance Checklist

Section 1: Safety & Environment

• Verify that all emergency exits are clear of obstructions and operational.
• Inspect all fire extinguishers for pressure gauge status and current inspection tags.
• Confirm that safety signage is visible and legible in all high-risk areas.
• Conduct a walk-through to ensure floor areas are free of fluid leaks or trip hazards.

Section 2: Mechanical & HVAC Systems

• Visually inspect all drive belts for tension, cracking, or signs of wear.
• Check all HVAC filters for dust buildup; replace if the airflow indicator triggers or if visual saturation is observed.
• Verify motor operating temperatures; check for abnormal vibration or high-pitched whining.
• Inspect fluid levels (oil, coolant, hydraulic) and top off as necessary, documenting the amount added.

Section 3: Electrical & Control Systems

• Ensure all electrical cabinet doors are closed, latched, and secured with keys.
• Inspect conduit runs for loose fittings or physical damage.
• Clean dust from external intake/exhaust vents on electronic control panels using a vacuum (do not use compressed air near sensitive circuits).
• Check indicator lights and HMI (Human-Machine Interface) screens for fault codes or flickering displays.

Section 4: Lubrication & Cleaning

• Apply approved lubricants to specified grease points according to the equipment lubrication schedule.
• Wipe down equipment chassis to remove excess oil, grease, or particulate buildup.
• Ensure all drip pans are emptied and cleaned to prevent overflow.

Pro Tips & Pitfalls

• Pro Tip: Use Predictive Data. Before starting the physical checklist, check the CMMS (Computerized Maintenance Management System) for any alerts generated by sensors during the previous week. This allows you to prioritize specific machines that may be trending toward failure.
• Pro Tip: Document "Near-Misses." If you notice a part that looks slightly worn but is still functional, record it in the "Notes" section of your checklist. This allows for proactive ordering of parts rather than emergency procurement.
• Pitfall: Over-Lubrication. A common mistake is applying too much grease, which can damage seals and cause overheating. Always adhere strictly to the equipment manufacturer’s lubrication volume specifications.
• Pitfall: Ignoring Small Leaks. Do not "wipe and forget" a fluid leak. If a leak exists, it is symptomatic of a failing seal or loose connection. Always identify the root cause rather than treating the symptom.

Frequently Asked Questions

1. What should I do if I find a fault that is not on the checklist? If you discover a fault outside the scope of the weekly checklist, immediately log it as a "Corrective Maintenance" (CM) request in the maintenance management system and notify your direct supervisor.

2. How long should this weekly maintenance take? While the duration varies by facility size, the average weekly maintenance cycle should take no longer than 4 hours for a standard-sized production floor. If tasks consistently exceed this, report it for a time-motion review.

3. What if a required part is out of stock? Record the deficiency on your checklist and mark it as "Pending Parts." Escalate this to the Inventory Manager immediately so the lead time does not impact the following week’s operational capacity.