Homogenizer Maintenance

Maintenance & Service of Homogenizer Motor Unit:

  1. The homogenizer should be given the care normally required for any electrical appliance.
  2. Avoid wetting or unnecessary exposure to fumes.
  3. The finish can be washed with water and soap or detergents, using a cloth or sponge.
    • Do not allow water to get inside the unit.
    • Allow drying before using.
  4. When necessary to replace motor unit brushes please contact a PRO Scientific Service technician (P#203-267-4600, sales@proscientific.com) or an authorized distributor.

Click here to request return paperwork for your homogenizer and/or generator.




  1. Never attempt to hold the lower end of the generator while the generator is attached to the motor.
  2. Over tightening the rotor knife onto the rotor shaft can result in breaking the shaft and/or distortion of the rotor knife.
  3. Any servicing of the homogenizer motor unit, except brush replacement, should be performed by the PRO Scientific Service Department.
  4. Use of any accessories or attachments other than those supplied by the manufacturer may be hazardous and voids all warranties.
  5. The motor unit is supplied with sealed ball bearings and requires no additional lubrication. Any additional lubrication to the motor can result in bearing and/or motor failure.
  6. Running a generator or chamber assembly without liquid media can cause damage to the bearings and consequently damage the generator.



Attaching the PRO Quick Connect Generator to the Homogenizer Motor Unit:

  1. All generators are fitted to the motor unit by inserting the upper end of the generator into the collar end of the motor.
  2. Align the vertical slots in the generator with the locating pins in the motor collar by rotating the generator.
  3. Once aligned, push the generator inward as far as possible and turn the generator left. The collar is spring loaded so you will feel some resistance as you push the generator inward and turn it.
  4. Once you have turned the generator ¼ turn, release the generator and you will hear a distinct click which is the generator dropping into its locked position.
  5. To prevent the generator from disengaging while being used, insert the safety clip between the upper collar of the generator and the bottom of the motor collar.
  6. To disconnect the generator from the motor unit, remove the safety clip, push the generator up into the motor collar as far as possible and turn the generator clockwise ¼ turn. The generator will be pushed out of the motor collar by the force of the internal spring.   


PRO Quick Connect Generator Operating Procedures:

  1. The generator may be used with either an open chamber or within a sealed chamber assembly.
  2. The ideal situation is when the diameter of the generator is as large as the container will allow.
  3. Insert the generator into the medium that is to be homogenized. The depth to which the generator is inserted should be 1/3 of the liquid’s height measured from the bottom of the container. According to the properties of the material, it may not be necessary to insert the generator to this depth. In case of heavy sediments, the generator may have to be positioned lower, but the generator must never come in contact with the bottom of the vessel.
  4. MID-BEARING NOTE: All generators that are 120mm in length and longer contain a mid-bearing, which is located inside the generator approximately half way up the shaft. The mid-bearing must be lubricated by the sample/liquid during processing, therefore the sample volume should cover about half the length of the generator.
  5. Start the drive unit at the lowest possible speed and then slowly increase the speed to the desired level.
  6. It is advisable that the generator be immersed within the container off-center. This off-center location will help minimize vortexing.
  7. The generators have two (2) sets of venting holes. One set is located approximately 1" from the bottom of the generator and the second set is approximately 1" below the bottom of the generator collar. The lower hole aids in keeping the lower bearing lubricated, while the top hole allows venting of any liquid that might be forced up into the tube. There is no need to avoid liquid from entering the lower set of holes.
  8. Once you have reached the level of processing that is required, reduce the motor speed and start to slowly remove the generator from the container while the motor is still running. It is important that this be done slowly as you want to spin all medium from the generator back into the container and not outside of the container.
  9. After spinning the medium off the generator, the motor can be turned off and the generator totally removed from the container.



Attaching the PRO Multi-Gen Adapter and Multi-Gen 7 and 7XL Generators to the Homogenizer Motor Unit:

  1. Align the grooves in the side of the adapter’s upper collar with the two (2) pins in the bottom of the motor collar.
  2. Push the adapter into the motor collar.
  3. Once inserted as far as it will go, turn the adapter left until you feel the adapter lock into place.  This should be approximately ¼ turn.  The collar is spring loaded so you will feel some light resistance as you push the generator inward and turn.
  4. Once the adapter is attached to the motor collar, it is important that the safety clip supplied with the adapter be inserted between the bottom of the motor collar and the shoulder of the adapter. Proper insertion of the safety clip will prevent the adapter from disengaging from the motor collar when ejecting the used generator.

Multi-Gen probe insertion



For additional PRO Generator Probe Maintenance Including Dismantling and Assembly Instructions Click Here

Click here to request return paperwork for your homogenizer and/or generator.


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