Disassembly Instructions

1. Safety Regulations and Information

These instructions are intended solely for motor disassembly. Parts cannot be re-used following disassembly.

Read these instructions carefully before starting disassembly work. Observe the following warnings to prevent malfunctions or danger to persons. Make sure the instructions are always to hand.

The disassembly instructions may be duplicated for information purposes. In these disassembly instructions, a radial fan is shown by way of example. The information also applies analogously to other fan species.

1.1. Personnel Qualifications

The product is only to be transported, unpacked, operated, maintained and otherwise used by suitably qualified, trained and authorized technical staff.

1.2. Notes on Disassembly

These instructions apply solely to disassembly of the following motor types:

• M3G150
• M3G200

2. Preparation

WARNING: Live terminals and connections even with the device switched off. Electric shock. Wait five minutes after disconnecting the voltage at all poles before opening the device.

WARNING: Do not re-use individual components. Risk of damage. Ensure proper disposal of the components removed.

CAUTION: Risk of injury. Wear safety shoes.

2.1. Tools

The following tools are required for disassembly:

The special tools are only examples. They cannot be delivered by ebm-papst.

3. Disassembly

3.1. Separating the electronics housing from the fan impeller

1. Unfasten the six screws at the housing.
2. Detach the housing.

3.2. Dismantling the electronics housing

1. Unfasten the four screws at the housing and detach the cover.
2. Disconnect the cables (not shown) and unfasten the cable glands.
3. Completely unscrew the three cable glands.
4. Unfasten the five screws in the terminal box.
5. Take out the cover.
6. Unfasten the two screws in the plastic terminal box.
7. Prise out the terminal block.
8. Take out the terminal block.
9. Take out the plastic terminal box.
10. Unfasten the six circuit board screws.
11. Use a screwdriver to prise out the circuit board.
12. Completely remove the circuit board.
13. Unfasten the three screws.

3.3. Opening the motor

1. Use two screwdrivers to prise out the fan impeller.
2. Use circlip pliers to detach the circlip.

WARNING: Strong magnetic attraction. Risk of injury. Do not reach into the area between the stator and rotor.

18. Fit the puller and screw it in position at all four tapped holes in the stator. Unfasten the stator by turning the spindle of the puller in clockwise direction.
19. Take out the stator.

3.4. Removing the ball bearing

1. Position the puller in the center.
2. Unfasten the ball bearing by turning the spindle of the puller in clockwise direction.
3. Take the ball bearing out of the puller and out of the rotor bell.
4. Take out the ring.
5. Use a screwdriver to unfasten the locking elements (lugs) at the cooling wheel.
6. Take out the cooling wheel.
7. Take out the remaining parts of the ball bearing.
8. Detach the O-ring.
9. Unfasten the four screws.
10. Detach the plastic ring.
11. Unfasten the four screws of the connector.
12. Pull out the plug contact.

3.5. Separating the rotor from the fan impeller

1. Use a screwdriver to unfasten the seven screws.
2. Detach the plastic ring.
3. Use a ratchet to unfasten the seven screws and detach the fan impeller.

4. Disposal

• Examine all the components and sort them into the applicable refuse categories (e.g. electrical components, metals, plastics).
• All electrical components are to be taken for separate recycling if this is required by the applicable local environmental and refuse disposal legislation.
• Following dismantling and sorting into refuse categories, the components are to be recycled or properly disposed of in accordance with the local environmental and refuse disposal legislation applicable at the time of disassembly.
• Call in a specialist company to deal with disposal if necessary.