How to lubricate the drive in your mixer

ID: 195104

Description: [youtubevideo|H8QL92DQE-g]If your hand mixer...

Steps:

  1. Unplug the mixer from the mains to eliminate the risk of electric shock.
  2. Lay a non-slip mat on a stable bench and arrange your screwdrivers, brush, oil, grease, vacuum, and paper towel within reach.
  3. Work in a well-lit area so small parts are not lost.
  4. Locate the three Phillips screws on the underside of the mixer housing.
  5. Brush away any packed flour or sugar from the screw heads so the driver seats fully.
  6. Remove the screws with a Phillips screwdriver and keep them in a safe place.
  7. Slide the beater-eject switch to the eject position to release the plastic clips.
  8. Gently lift the upper cover off; avoid prying aggressively to protect the aged plastic.
  9. Identify the two bronze bushings at each end of the rotor shaft; these are the primary lubrication points.
  10. Do not bend or open the carbon-brush holder because it can crack and is hard to reinstall.
  11. Keep all lubricant away from the commutator and carbon brushes.
  12. Carefully pull the beater carrier plate off the gear train.
  13. Support the brittle plastic while lifting to prevent snaps.
  14. Lift the two gears and the small spacer pin straight out and set them aside in order.
  15. Brush loose flour, sugar, and crumbs from the housing and gears.
  16. Use a vacuum cleaner with a brush or compressed air to remove stubborn dust.
  17. Optionally wash greasy parts under warm water, then dry completely before reassembly.
  18. Apply one drop of light machine oil onto the rear bushing where the shaft enters the motor frame.
  19. Move the rotor up and down a few millimetres to draw oil into the bushing.
  20. Repeat on the front bushing beside the cooling fan.
  21. Keep oil away from the commutator area.
  22. Spread a thin layer of medium grease onto the gear teeth and smooth bearing surfaces.
  23. Use a finger or small brush; excess grease will be flung harmlessly into the housing during use.
  24. Do not substitute oil here because it will spin off and leave the gears dry.
  25. Holding the greased gears, align the cross-shaped beater sockets so one is vertical–horizontal while the other is diagonal.
  26. This 90-degree offset prevents the beaters from clashing.
  27. Lower both gears and the spacer back into the housing without disturbing their position.
  28. Lightly grease the metal washers and slide them onto the gear spindles.
  29. Reinstall the plastic carrier plate, making sure its tabs seat in the housing slots.
  30. Position the speed control and eject lever back into their tracks, pressing gently until they click.
  31. Ensure the selector lines up with the notch on both sides of the housing.
  32. Route the power cord into its channel so it is not pinched.
  33. Lower the upper housing onto the base, squeezing slightly until it seats evenly.
  34. Install the three Phillips screws and tighten them firmly but not excessively.
  35. Plug the mixer in and run it without beaters; it should spin smoothly and quietly like a sewing machine.
  36. If vibration persists, unplug and re-check gear alignment.
  37. Regular lubrication prevents overheating and extends service life.
  38. Different brands place fans front or rear, but the gear lubrication principle is identical.
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