Standard Operating Procedure: Daily Preventive Maintenance (PM)

Introduction

This Standard Operating Procedure (SOP) outlines the daily preventive maintenance protocol designed to ensure optimal equipment functionality, workplace safety, and operational continuity. Consistent execution of these tasks is critical to minimizing unplanned downtime, extending the lifecycle of capital assets, and maintaining compliance with safety standards. All facility operators and maintenance technicians are required to complete this checklist at the start of each shift and document findings in the Maintenance Management System (CMMS).

1. Safety and Site Preparation

• Don PPE: Ensure all necessary Personal Protective Equipment (gloves, safety glasses, high-visibility vest) is worn before approaching equipment.
• Energy Isolation: Verify that all equipment is in a "Ready" state; perform a lockout/tagout (LOTO) check if any anomaly was reported in the previous shift.
• Area Clearing: Remove any debris, spills, or obstructions from around the equipment perimeter to ensure clear access and emergency egress.
• Calibration Check: Confirm that gauges, digital interfaces, and control panels are displaying live data within normal operating parameters.

2. Mechanical and Physical Inspection

• Visual Integrity: Inspect for loose bolts, missing fasteners, or damaged housing components.
• Lubrication Check: Examine fluid levels (oil, hydraulic, coolant) and check for visible leaks or pooling beneath the machinery.
• Vibration Analysis: Perform a manual "hand-test" (where safe) or use a vibration sensor to detect abnormal rattling or grinding sounds during equipment idling.
• Belt/Drive Inspection: Check drive belts for proper tension and signs of fraying or excessive wear.

3. Electrical and Control Systems

• Wiring Audit: Inspect visible cable runs for signs of fraying, heat discoloration, or rodent damage.
• Control Panel Hygiene: Ensure the electrical cabinet door is sealed properly and free of dust accumulation or moisture.
• Emergency Stop Test: Briefly confirm that the E-stop circuit is responsive (conducted via a controlled soft-test as per specific machine manufacturer guidelines).
• HMI Functionality: Verify that all screens, buttons, and touchpads are responsive and free of sticky residue or input lag.

4. Sanitation and Documentation

• Clean-as-you-go: Remove dust, oil splatter, or particulate matter from machine surfaces using specified cleaning agents and lint-free cloths.
• Consumable Refill: Replenish necessary operating supplies (lubricants, wipes, filters) if levels have fallen below the 20% mark.
• Log Completion: Sign off on the daily digital log, noting any minor discrepancies even if they did not require an immediate work order.
• Reporting: Submit an "Urgent Maintenance Request" (UMR) immediately if any item in the checklist returns a "Fail" or "Degraded" status.

Pro Tips & Pitfalls

• Pro Tip: The "5-Sense" Approach. Beyond digital monitors, rely on your senses. A faint smell of ozone often precedes an electrical short; a slight metallic odor can indicate overheating parts.
• Pro Tip: Batching. Perform inspections at the same time every day to ensure data consistency and allow you to build a baseline of "normal" performance.
• Pitfall: Pencil Whipping. Never check off items without physically inspecting them. The time saved by skipping the physical check is negligible compared to the cost of a catastrophic machine failure.
• Pitfall: Ignoring Small Leaks. A small hydraulic weep today is often a total system failure within 48 hours. Report all leaks regardless of size.

FAQ

Q: What should I do if I find a piece of equipment failing during my check? A: Do not attempt to operate the machine. Tag the machine as "Out of Service," notify your shift supervisor immediately, and log the specific issue in your CMMS.

Q: Can I use different cleaning agents on sensitive control panels? A: No. Only use the facility-approved, non-conductive, and non-corrosive cleaning solutions designated for sensitive electronics to prevent component damage.

Q: How do I handle a discrepancy that is minor but recurrent? A: Even minor recurring issues should be flagged as a "Trend" in your maintenance log. This data helps our engineering team identify potential long-term wear patterns before they lead to failure.