Preseason Fan Maintenance: Maximize Summer Cooling Performance

As temperatures rise, proper ventilation becomes essential for maintaining animal comfort and productivity. Performing preseason maintenance on summer fans is one of the simplest and most effective ways to ensure maximum airflow during the hottest months. Use this comprehensive checklist to prepare your fans for peak performance.

1. Inspect and Replace Fan Belts

Replacing fan belts annually is one of the most important preseason maintenance steps. Over time, belts naturally wear down—often by as much as 20%—which directly reduces fan performance.

Why Do Belts Lose Efficiency?

Despite common belief, fan belts do not stretch. Instead, they wear thinner from continuous contact with the pulleys. As the belt sits lower in the pulley groove, it causes the fan blades to rotate more slowly, reducing airflow.

What About Link-Style Belts?

Link-style belts are often misunderstood. Some believe only damaged links need replacement, but every link experiences the same amount of flexing and wear. A failure in one link means the rest are not far behind.
Link belts should be replaced annually, just like standard belts.

Their advantage? Convenience. Instead of stocking multiple belt sizes, you can order link belts in bulk and adjust them to fit.

For detailed steps on replacing both belt types, see our Belt Replacement Video.

2. Inspect Fan Pulleys

Once the belts are off, visually inspect each pulley. The grooves should maintain a crisp V shape. Rounded or worn grooves indicate the pulley is no longer gripping the belt properly and should be replaced to ensure consistent fan speed.

To align new pulleys quickly and accurately, use the Laser Fan Pulley Alignment Kit. Simply place the laser pointer in the existing pulley groove and adjust the new pulley until the beam lines up with the target. The target piece can also double as a handy gauge to check older pulleys for wear.

3. Always Use the Same Size Replacement Pulley

Using the correct pulley size is essential for both performance and equipment longevity.

• Larger pulleys increase blade speed but also raise the motor’s amp draw, which can lead to overheating and premature motor failure.
• Smaller pulleys slow down the blades, reducing airflow and cooling effectiveness.

Replacing the pulley with one that matches the original size ensures reliable, efficient operation.

4. Adjust the Auto-Tensioner

After replacing belts or pulleys, take a moment to check and reset the auto-tensioner.

• Flex the tensioner several times to ensure its internal spring is moving freely and not seizing.
• With the belt installed, confirm that the indicator bar sits between the first and second marks on the tensioner body.
• If additional tension is required, rotate the body nut counterclockwise.

You can find more details in our Auto-Tensioner Adjustment Guide.

5. Install an Auto Greaser for Fan Bearings

Consistent bearing lubrication is critical—but realistically, most people don’t grease bearings as often as needed during the season. The result tends to be over-greasing at the start and under-greasing later on.

Over-lubrication can be just as harmful as neglect, causing:

• Damaged seals
• Excess heat from fluid friction
• Shortened bearing life

The Auto Greaser eliminates both over- and under-greasing by delivering slow, steady lubrication throughout the season.

6. Clean and Inspect Shutters

Dirty shutters can cut fan output by up to 8%, making regular cleaning an easy, high-impact step.

• Avoid power washers—they can damage components.
• Use a broom or soft brush, and store one nearby for quick cleanings during the season.
• Replace any bent or damaged vanes or rods to ensure shutters open and close properly.

Exhaust cones boost fan efficiency by about 10%, but missing or damaged sections eliminate those gains. Look for pieces bent or broken by wind, ice, or snow, and replace anything that’s compromised to restore full performance.

Keep Your Fans Moving Maximum Air

Effective airflow is essential for keeping pigs comfortable and productive during hot weather. A thorough preseason maintenance routine ensures your fans deliver peak performance and efficiency when you need them most.