Fixing a cordless Einhell strimmer

Having bought into the Einhell battery system for various tools, we stuck with it when it came to gardening tools too. Whilst they are affordable, they're also far from the highest quality, as demonstrated by the need for this repair 


A close up of the Einhell strimmer

The strimmer worked intermittently with the motor cutting out seemingly arbitrarily. There are only a handful of screws holding it together and so it comes apart very easily. Inside the handle, the battery connector and switch all seemed to have sound connections.


To get into the motor housing there are a couple of extra things to remove. First the spindle plate must be removed, it's held on with just the one central machine screw.

The machine screw visible in the centre of the spindle plate


The safety guard is slid off the back after fiddling with the tab that holds it on
The spindle plate removed showing the tab securing the safety guard


The screws in the motor housing can then be removed, only those in the red part need to be removed to get to the motor. Removing the black part allows access to the coiled up cable inside the extending handle.
The side of the motor housing showing the screws to be removed



Care must be taken when separating the two halves to ensure the spring on the head tilt button doesn't fly off somewhere.
The spring for the head tilt button inside the motor housing



Once inside the motor housing the problem became apparent. One of the soldered connections on the motor was no longer secure.
The electrical connections to the motor, with one visibly not attached securely


Using a bit of flux and a soldering iron, the connection was easy to re-make.

A tub of flux with a blob of it on the broken connection

Putting things back together is just a case of reversing the disassembly steps, with the only fiddly bit being the spring. I found squeezing it together before placing it in was best, then a flat screwdriver can be used to shimmy it down into place.


After this repair the strimmer works perfectly once more.

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