Drum Fan Motor Replacement: Step-by-Step Guide

By We re still here！ | Published: 2026-10-17

Category: How-to Guides

Learn how to safely replace the motor in your belt drive drum fan. This step-by-step guide covers motor removal, bearing plate assembly tips, and reinstallation for 36-60 inch fans.

Quick answer

To replace the motor on a belt drive drum fan, first disconnect power and remove the front grille and fan blade assembly. Then unbolt the old motor from the bearing plate assembly, install the new motor, and reassemble in reverse order. The bearing plate assembly (part number 2554680) is a common component that may need replacement if worn.

When to Replace the Motor vs. the Bearing Plate Assembly

If your drum fan hums but the blades won't turn, the motor bearings may be seized. However, sometimes the issue is the bearing plate assembly (part 2554680) that supports the motor shaft and pulley. Inspect the bearing plate for cracks or excessive play before ordering a new motor. The bearing plate assembly is compatible with poly dent-free guarantee and select steel 36-60 inch belt drive drum fans, so check your fan model number (e.g., BF36BDPE) before purchasing.

Tools and Safety Precautions

You'll need a screwdriver, socket wrench set, and a replacement motor rated for your fan's voltage (typically 115V or 230V). Always disconnect the fan from its power source before starting. Wear work gloves when handling the fan blade kit to avoid cuts from the aluminum blades.

How to Replace a Drum Fan Motor: Step by Step

Step 1: Disconnect Power and Remove Front Grille: Unplug the fan or turn off the circuit breaker. Remove the screws securing the front grille (part 2554611 for 42-inch steel models) and set the grille aside. Common mistake: Forgetting to disconnect power. Always verify with a non-contact voltage tester.
Step 2: Unbolt the Fan Blade Assembly: Remove the fan blade kit (4 aluminum blades and hub) from the motor shaft. On direct drive models, the blade kit (part 2554662) is held by a setscrew; on belt drive models, loosen the pulley setscrew first. Checkpoint: Mark the blade orientation with tape so you reinstall them in the same order to maintain balance.
Step 3: Remove the Motor Mounting Bolts: Locate the motor mounting bolts on the bearing plate assembly (part 2554680). Use a socket wrench to remove them. Support the motor while unbolting to prevent it from falling. Common mistake: Overtightening bolts during reassembly can strip the threads in the bearing plate. Hand-tighten then give a quarter turn.
Step 4: Disconnect Wiring and Remove Old Motor: Take a photo of the wiring connections before disconnecting. Unscrew the wire nuts and remove the old motor. If the motor is seized, use a puller to separate it from the shaft. Checkpoint: Compare the new motor's shaft diameter and length to the old one. They must match for the pulley and blade hub to fit.
Step 5: Install New Motor and Reassemble: Position the new motor on the bearing plate, tighten the mounting bolts, and reconnect the wiring following your photo. Reattach the pulley, belt, fan blade kit, and front grille. Restore power and test the fan on low speed first. Final check: Listen for scraping or vibration. If present, the blade hub may not be fully seated on the motor shaft.

Key Replacement Parts for Your Drum Fan Motor Job

Bearing Plate Assembly for Dent-Free Guarantee (Poly) and Select Steel 36 - 60 in. Belt Drive Drum Fans: This bearing plate installs behind the fan struts and facilitates the operation of the fan with a shaft for installing the 6 in. pulley, belt, and fan blade assembly. For use only with our poly (dent-free guarantee) 36 in., 42 in., 48 in., or 60 in. belt drive drum fans and steel 60 in. belt drive drum fans. If your old bearing plate is worn, the motor shaft won't spin freely. Replacing it during a motor swap prevents future vibration and belt misalignment. Check that your fan model begins with BF36BDPE, BF42BDPE, BF48BDPE, or BF60BDPE.
Front Grille for Steel 42 In. Belt Drive Drum Fans: This front grille is powder-coated in a black finish for durability and is easily swapped with your old grille using common household tools. For use only with our 42 in. drum fans. This grille is compatible with steel fan models beginning in BF42BD. If the grille is bent or rusted, replace it while the fan is disassembled. A damaged grille can reduce airflow and pose a safety hazard.