Screwfix Concrete Mixer Electrical Repair

Came to use my mixer after a year in storage and everything seemed ok, the motor ran when turned on but after a few moments the motor stopped and it took a few presses of the button to get it started again.

Tipping the mixer to empty it, the mixer yet again stopped but would not restart until it was tilted back.

This random stopping was really frustrating, so off came the wiring enclosure cover to see if any cables have come loose, but nothing obvious other than signs of water ingress which must have happed when the mixer was in storage.

Fortunately I managed to repair it for under £10!

Rusted screws and slight discoloration around the switch connections, but apart from that nothing really immediately obvious as to why it keeps cutting out, so I ordered a new ‘No Volt Release’, Start/Stop module from Amazon, the one selected was a Dacvgog CK21 Electromagnetic switch for concrete cement mixers 240V:

Once arrived, switch removal was very easy by depressing the internal wings on either side and popping out, I made the connections to the new switch before pushing into the hole with a reassuring click.

Power on and everything works as it should with no intermittent stopping irrespective of being tilted or not, to check it wasn’t a fault with the motors thermal fuse internal connections, I took the old starter switch apart to check its condition:

As you can see there is extensive water damage to the Start/Stop switch internally, but only minor signs on the outside, hopefully everything will be fine now 🙂

Rough wiring drawing HERE.

6 thoughts on “Screwfix Concrete Mixer Electrical Repair”

  1. Purchase a cement mixer from screw fix earlier in the year. I’m now wanting to purchase a motor cover o prevent cement/ concrete falling onto the motor during the mixing. Can you advise me where I can purchase this additional part.

  2. I have a problem with the motor starting, yet everything worked fine before I put it into storage in my garage. The switch can be heard to click when mains power is connected and the Green power button pressed, so not sure it is the switch. The motor seems to get hot but it’s not driving the drum. Should I be expected to freely turn the drum with or without power applied, because I can’t. So suspecting something has seized, albeit wouldn’t have expected that as the unit has been stored in a dry environment and had little use. Any ideas?

  3. Hi Gary,

    The drum is geared so you will not be able to turn it by hand, for the motor to get warm, it could be that the start capacitor has failed or the drum gears/motor has seized.

    The capacitor is a part that can sourced and be replaced after checking that the drum is free by removing the motor and checking that the drum can be rotated.

    Hope you get it sorted.

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