How to Change the Oil Filter on Your Rotary Screw Compressor

How to Change the Oil Filter on Your Rotary Screw Compressor: A Step-by-Step Guide

[VIDEO: How to Change the Oil Filter on Your Rotary Screw Compressor]

Disclaimer: Before starting any air compressor maintenance, ensure you have the necessary personal protective equipment (PPE).

When it comes to maintaining your rotary screw compressor, changing the oil filter is crucial for keeping your equipment running smoothly. In this guide, we’ll walk you through the steps to replace your oil filter safely and efficiently.

Preparing for Maintenance

Safety First

Ensure your work area is clear of hazards before beginning. Make sure you have the following materials ready:

• New oil filter
• Oil pan
• Pig mat/oil absorption mat
• Strap wrench
• Molykote grease
• Lockout Tagout (LOTO) mechanism

Lockout Tagout Procedure

This is the most important safety step. Warning: Only a qualified technician should perform this maintenance.

Our technician begins by engaging the lockout tagout process. Notice how he uses his right hand to lock out the handle and turns his body to the left. This technique is to avoid potential arc flash hazards. He ensures the panel is locked securely and isolates the air system by turning the handle to the "off" position.

Removing the Old Oil Filter

1. Position the Oil Pan: Place the oil pan under the oil filter to catch any oil that drips during removal.
2. Loosen the Filter: Use a strap wrench to loosen the oil filter. Once loose, unscrew the rest by hand and carefully remove the filter. Place the saturated oil filter into the oil pan to drain.

Installing the New Oil Filter

1. Prep the New Filter: Before installation, apply a thin layer of molly coat grease to the gasket on the new oil filter. This prevents the filter from seizing on the housing.
   (Pro tip: If the oil filter is mounted vertically, pre-fill it with oil to reduce airlock issues.)
2. Clean the Connection Area: Use a clean rag to wipe the mounting surface. This ensures a tight, leak-free seal when the new filter is attached.
3. Attach the New Oil Filter: Hand-tighten the new filter as much as possible, then use the strap wrench to secure it further. This prevents the filter from loosening due to machine vibrations.

Powering the Compressor Back On

1. Remove the Lockout Tagout Mechanism: Just like during the lockout process, turn away from the panel as you re-engage the power.
2. Reopen the Air Supply Valve: Slowly turn the air supply valve back to the "on" position, ensuring everything is functioning correctly.