Gtech hedge trimmer
- Thread starter mickcoulson
- Start date
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So, my uncle's Gtech hedge trimmer stopped cutting. The blades move, but don't cut anything.
I was trying to cut a tiny lump of grass, and some dead grass and thin bramble strands. Not a chance.
I found this wonderful thread, so stripped it down to see if anything was amiss.
What I found was a thick cake of dark grease, that was crumbly and bitty.
I don't know if my uncle has ever taken it apart and greased it.
But after I cleaned it up and put it back together - there is no real force behind the cut.
Whilst both blades move, there is only a cutting edge on one side of each blade. As in it cuts by guillotine, rather than like two cutting edges of decent scissors.
The blades appear to be the same identical piece, with one just being upside down compared to the other.
It made me wonder, do these only have any force behind the cut when new, because the whole mechanism is stuffed full of grease and has to cut. And then once it's been used a bit, and the grease has got warm and seeped out - the reciprocating drive is just sloping around and throwing the blade forward rather than driving it forward?
After I cleaned the blades, I tried to cut some toilet tissue with it. All it did was bend the paper !
The red magnet is to hold the nut in position, so you can get the bolt back in.
I was trying to cut a tiny lump of grass, and some dead grass and thin bramble strands. Not a chance.
I found this wonderful thread, so stripped it down to see if anything was amiss.
What I found was a thick cake of dark grease, that was crumbly and bitty.
I don't know if my uncle has ever taken it apart and greased it.
But after I cleaned it up and put it back together - there is no real force behind the cut.
Whilst both blades move, there is only a cutting edge on one side of each blade. As in it cuts by guillotine, rather than like two cutting edges of decent scissors.
The blades appear to be the same identical piece, with one just being upside down compared to the other.
It made me wonder, do these only have any force behind the cut when new, because the whole mechanism is stuffed full of grease and has to cut. And then once it's been used a bit, and the grease has got warm and seeped out - the reciprocating drive is just sloping around and throwing the blade forward rather than driving it forward?
After I cleaned the blades, I tried to cut some toilet tissue with it. All it did was bend the paper !
The red magnet is to hold the nut in position, so you can get the bolt back in.
Last pic, Mick - the one with the handle.
Somethings up with that circlip in the middle.....its deformed as if its come adrift and its allowing that alloy drive dog to float.
Any comments on that?
John
Looks like an overload clutch, for when the blades jam.
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That blade is designed to cut on both the push, and the pull stroke, on both sides of the blade. The blades do not operate close enough to cut tissue paper, they are designed to cut thicker material like hedges.
I've never seen the inside of a Gtech before, but there is something wrong here.
Last picture:.....that blade (nearest the bottom) has nothing to shear against!
I'm wondering if the blade location can be juggled some how - upside down, left to right or whatever - so the two cutting areas shear together?
John
Last picture:.....that blade (nearest the bottom) has nothing to shear against!
I'm wondering if the blade location can be juggled some how - upside down, left to right or whatever - so the two cutting areas shear together?
John
The two halves of the moving blads sheer against the other. So the top blade only cuts on the upper teeth (sheering against the bottom blade's upper teeth), whilst the lower teeth are the edge that the bottom blade's cutting teeth sheer againstI've never seen the inside of a Gtech before, but there is something wrong here.
Last picture:.....that blade (nearest the bottom) has nothing to shear against!
I'm wondering if the blade location can be juggled some how - upside down, left to right or whatever - so the two cutting areas shear together?
John
I forgot that my Uncle had also bought the Brush cutter saw, that goes on the end of the GTECH. Attached that, and it's also awfully slow. So it's clearly the electric motor that's the issue. Will have to strip the main body apart and look at the carbon brushes, and contacts
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