Loren Cook Company AC Exhauster ACW-D

NOTICE! The fan bearings are provided prelubricated. Any specialized lubrication instructions on fan labels supersedes information provided herein.

Bearing grease is a petroleum lubricant in a lithium base conforming to a NLGI #2 consistency. If user desires to utilize another type of lubricant, they take responsibility for flushing bearings and lines, and maintaining a lubricant that is compatible with the installation.

A NLGI #2 grease is a light viscosity, low-torque, rust-inhibiting lubricant that is water resistant. Its temperature range is from -30°F to 200°F and capable of intermittent highs of 250°F.

Bearings should be relubricated in accordance with the condition chart. See Condition Chart.

For best results, lubricate the bearing while the fan is in operation. Pump grease in slowly until a slight bead forms around the bearing seals. Excessive grease can damage seal and reduce life through excess contamination and/or loss of lubricant.

Did a slight bead form around the bearing seals?

In the event that the bearing cannot be seen, use no more than three injections with a hand operated grease gun.

Warning: This procedure requires trained personnel with PPE!

Drill two holes approximately centered between the shaft and the edge of the hub OD with the following dimensions: • 1/4\ diameter • 3/8\" to 1/2\" deep • 180° apart in face of hub"

Tap 1/4\ holes to 5/16\" thread with the 5/16\" hole tap. Do not drill or tap any larger than recommended."

Screw the puller arms into the tapped holes full depth of threads (3/8\ to 1/2\" approximately). Align center of puller with center of shaft. Make certain all setscrews in hub (normally a quantity of two) are fully removed. Work puller slowly to back wheel off the shaft."

Sign off on the fan wheel replacement

Warning: This procedure requires trained personnel with PPE!

The correct wheel-to-inlet clearance is critical to proper fan performance.

Verify the wheel-to-inlet clearance before initial start-up.

Adjust the overlap by loosening the wheel hub and moving the wheel along the shaft to obtain the correct value.

Check if the wheel hub has been loosened and the wheel moved along the shaft.

A uniform radial gap is obtained by loosening the bearing bolts and set screws which will allow for correct repositioning.

Check if the bearing bolts and set screws have been loosened and the radial gap is uniform.

Sign off on the fan wheel-to-inlet clearance adjustment

1. Clean the motor and fan shafts.

2. Loosen the motor plate mounting bolts to relieve the belt tension. Remove the belt.

3. Loosen the pulley setscrews and remove the pulleys from the shaft. If excessive force is required to remove the pulleys, a three-jaw puller can be used. This tool, however, can easily warp a pulley. If the puller is used, inspect the trueness of the pulley after it is removed from the shaft. The pulley will need replacement if it is more than 0.020 inch out of true.

4. Clean the bores of the pulleys and place a light coat of oil on the bores.

5. Remove any grease, rust or burrs from pulleys.

6. Place the fan pulley on the fan shaft and the motor pulley on the motor shaft. Damage to the pulleys can occur when excessive force is used in placing the pulleys on their respective shafts.

7. After the pulleys have been correctly placed back onto their shafts, tighten the pulley setscrews.

Inspection of the fan should be conducted at the first 8 hour interval of satisfactory operation.

During the inspections, stop the fan and inspect as instructed.

Inspect belt alignment and tension. Adjust and tighten as necessary.;