Loren Cook Company AC Exhauster ACW-XP

Warning: This procedure requires trained personnel with PPE!

Is the motor a Direct Drive 1050/1075,1200,1300 &1500 rpm unit?

If yes, proceed with the following steps. If not, skip to step 7.

Has the unit been stored for a year or more?

Is the unit in severe conditions?

Add LIGHT grade mineral oil or SAE 10W oil up to 30 drops.

Does the motor have sleeve bearings?

If yes, proceed with the following steps. If not, skip to step 12.

Is the motor in severe applications, high temperatures or excessive contaminates?

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 overlap has been adjusted correctly.

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

Check if the radial gap is uniform.

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

Warning: This procedure requires trained personnel with PPE!

Drilled two holes approximately centered between the shaft and the edge of the hub OD with the following dimensions: 1/4\ diameter

Tapped 1/4\ holes to 5/16\" thread with the 5/16\" hole tap"

Do not drill or tap any larger than recommended.

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

Sign off on the fan wheel replacement

Warning: Stop the fan before inspection

Bolts inspected and tightened as necessary?

Setscrews inspected and tightened as necessary?

Motor mounting bolts inspected and tightened as necessary?

Warning: This procedure requires trained personnel with PPE!

Burrs removed from the shaft by sanding

New bearings slid onto the shaft and loosely mounted onto the bearing support

Wheel correctly positioned and bearing bolts securely tightened to the bearing support

Setscrews aligned bearing to bearing and secured tightly to the shaft

NOTICE! Never tighten both pairs of setscrews before securing bearing mounting bolts. This may damage the shaft.

Wheel position inspected again and readjusted if necessary

Sign off on the fan bearing replacement