Restoring a 1951 Kenwood “Chef” Electric Food Mixer – Part 1

12 thoughts on “Restoring a 1951 Kenwood “Chef” Electric Food Mixer – Part 1”

  1. I just got one in beautiful condition. However the rubber “fingers” that is holding the blending glass jug in position, became brittle. I take it after so many years something has got to give.

  2. I have a Model A700.D which was my mothers. She obtained this in Toronto Canada, by contracting to purchase a 3 year supply of powdered milk. This was likely around 1954. This unit had all if the attachments including juicer sausage maker meat grinder and top blender. the unit still works beautifully. I am concerned that because of age and component (ie. ribber and various seals like cork etc
    will need replacing. This looks like a daunting challenge. Thanks for the superb detail in your dismantling tutorial.

  3. Thanks for the interesting comment. It is a bit of a challenge to restore one of these, but very satisfying and well worth it. At a minimum you will need to clean out the gearbox and replace the grease, replace the seals and the large o-ring around the gearbox (I made my own from some o-ring cord), replace the motor brushes, and check the motor wiring from signs of insulation damage. The next step would be to replace the electrical components – but your mixer may keep going for a while yet if the current components are still ok. Just inspect them and see if any of the capacitors have blown.

    1. I have one of these beauties. We live in Canada and when my family moved here from South America in 1963 with all 11 children, my parents, and my mother’s mother, the only thing she insisted on bringing with her outside of clothing and personal belongings was this Kenwood, all million pounds of it. She just recently passed and left it for me (she and I both love to bake). When I turned it on there is a burning smell. My husband and I are anxious to restore it ourselves as a labour of love and are hoping you might comment on what specific area to concentrate on given the burning smell. Thank you for such a great demonstration of “how to..”

      1. Wow, what an interesting history your machine has! You definitely have to fix it. A burning smell…well the main part that gets really hot is the big wire-wound resistor that is used to slow the motor as part of the speed control mechanism. If it’s a burning plastic type smell, then it might be an insulated wire that is too close to the resistor. If it’s more of a burning oil type smell, then some oil (from the gearbox grease) has most likely leaked into the motor compartment. This is very common, as oil separates from the old grease, and the old seals between the motor and the gearbox can no longer contain it. You can see in my post that my very early A700 motor was completely saturated with oil. It didn’t run before I restored it, so I don’t know what it would have smelled like! The good news is that these are fairly simple machines to fix, if a little messy with all that old grease to clean up. Given the age of the machine, I would suggest you take the time and effort to do a complete overhaul of the gearbox and motor, including replacing all the seals, motor brushes, and any degraded wiring.

        Is your machine is an A700, or an A700-D? And out of interest, what is the serial number?

      2. Thanks so much for writing back so quickly. Mine is the 700A model, serial number 136842. I appreciate very much you pointing us in the right direction. It does not smell like plastic, definitely more an oil smell. I can’t wait to get started!

      3. That’s quite an early machine, so it will almost certainly have leaked oil into the motor. This was obviously a problem at time, as they improved the seal between the motor and gearbox starting with serial number 255615. I cut my own nitrile rubber seal to replace the original cork seal. We’ll have see how it holds up over time! I’m going to send you a link so that you can download the original service manual as well.

  4. We have a 700A Serial No 27551 with speed control 1-16. Runs well except after long use there is a noise like a dry bearing. The gearbox is a little noisy so would a strip down be in order ? Many thanks.

    1. Yes, most definitely! That is a very early A700 – the lowest serial number I’ve come across. This almost certainly means that, if it hasn’t been been serviced before, the gearbox grease will be completely degraded and oil may be leaking into the motor compartment. Also, the motor wires are likely to have cracked or even be missing insulation, making them a potential shorting hazard. The old suppression capacitors will probably be blown too. I would be giving it a full internal restoration (grease and seals replacement, and motor clean and re-wire) at least.

      1. Many thanks for the prompt reply, Looks like I have some (enjoyable ) work in front of me. Trying at all costs to avoid a modern replacement.

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