|
Post by ajm on Apr 12, 2024 18:51:46 GMT 1
My mower has recently started to leave a thin line of uncut grass down the middle of the swath. I know there is a gap between the 2 blades and I always assumed that suction would get that bit under the cutters. It now means I only cut half a width so that I can cut the offending strip next time round. So cutting now takes nearly twice as long and uses twice as much petrol. I have throughly cleaned under the deck. Any thoughts?
|
|
|
Post by Olave H on Apr 12, 2024 19:28:18 GMT 1
My mower has recently started to leave a thin line of uncut grass down the middle of the swath. I know there is a gap between the 2 blades and I always assumed that suction would get that bit under the cutters. It now means I only cut half a width so that I can cut the offending strip next time round. So cutting now takes nearly twice as long and uses twice as much petrol. I have throughly cleaned under the deck. Any thoughts? My mover has two blades set at 90 deg to each other with the 'timing' controlled by a toothed belt.
They are each longer than half the cut width so the cut overlaps & would clash if not set as I mentioned. Worth a look to see what's happening to your blades if it cut OK before this problem.
|
|
|
Post by ajm on Apr 12, 2024 19:52:31 GMT 1
My mower has recently started to leave a thin line of uncut grass down the middle of the swath. I know there is a gap between the 2 blades and I always assumed that suction would get that bit under the cutters. It now means I only cut half a width so that I can cut the offending strip next time round. So cutting now takes nearly twice as long and uses twice as much petrol. I have throughly cleaned under the deck. Any thoughts? My mover has two blades set at 90 deg to each other with the 'timing' controlled by a toothed belt.
They are each longer than half the cut width so the cut overlaps & would clash if not set as I mentioned. Worth a look to see what's happening to your blades if it cut OK before this problem.
I'll have a look thanks
|
|
Aardvark
Non-gamer
Living in soggy 22 and still wondering what's going on.
Posts: 2,172
|
Post by Aardvark on Apr 13, 2024 7:39:46 GMT 1
Most ride on mowers have ordinary V-belts without teeth so can't be synchronised. In this case they use blades with an angle bent at the tips to create turbulence that tends to get the grass to move to the centre. I recently noticed that serious cracks were developing in these bends. I was concerned that if one of the blade tips parted it would present potentially dangerous shrapnel so I replaced them. The next time I did the cut I noticed the uncut strip in the middle was much reduced.
|
|
|
Post by Olave H on Apr 13, 2024 9:39:58 GMT 1
Most ride on mowers have ordinary V-belts without teeth so can't be synchronised. In this case they use blades with an angle bent at the tips to create turbulence that tends to get the grass to move to the centre. I recently noticed that serious cracks were developing in these bends. I was concerned that if one of the blade tips parted it would present potentially dangerous shrapnel so I replaced them. The next time I did the cut I noticed the uncut strip in the middle was much reduced. My mower's blades have changeable cutting tips with a large pivot bolt & sacrificial small malleable bolts which shear if tips in contact with logs etc to save strain on toothed belt. These tips have a bent section to create turbulence of some sort.
Seems a weird sort of design that allows an uncut strip between two mower blades. Some sort of Mohican mower?
|
|
|
Post by chrisell on Apr 13, 2024 9:53:13 GMT 1
Change the blades. You've probably hit a rock or 2 - ends of blades get knackered and they no longer "meet".
|
|
|
Post by ajm on Apr 13, 2024 11:12:11 GMT 1
The blades are knacked. Unfotunately I can't get them off so will have to enlist the local mister fixit
|
|
|
Post by chrisell on Apr 13, 2024 11:50:53 GMT 1
Sounds dumb but make sure you are undoing - they can be reverse thread.
Penetrating oil - big spanner and hit it properly having made sure of direction (not that I've got it wrong in the past).
|
|
|
Post by Olave H on Apr 13, 2024 12:35:26 GMT 1
Sounds dumb but make sure you are undoing - they can be reverse thread. Penetrating oil - big spanner and hit it properly having made sure of direction (not that I've got it wrong in the past). Excellent call. Could well be that.
|
|
|
Post by chrisell on Apr 13, 2024 12:43:27 GMT 1
And....your blades will be blunt except the recently torn metal. Gloves and hold the blade I find easier than chocking the blade - although once you reach hammer stage it's not that practical
|
|
Aardvark
Non-gamer
Living in soggy 22 and still wondering what's going on.
Posts: 2,172
|
Post by Aardvark on Apr 13, 2024 18:01:44 GMT 1
Sometimes the hex bolts that hold the blades on will be worn and an ordinary 12 point spanner will not get a good grip. I use a six point socket and an impact tool to undo them. It was hard work and almost impossible before I learned this method.
|
|
|
Post by ajm on Apr 13, 2024 18:46:58 GMT 1
Sometimes the hex bolts that hold the blades on will be work and ordinary 12 point spanners will not get a good grip. I use a six point socket and an impact tool to undo them. It was hard work and almost impossible before I learned this method. That's why I'm going to use the local monoculture.
|
|
|
Post by Olave H on Apr 13, 2024 19:08:34 GMT 1
Sometimes the hex bolts that hold the blades on will be work and ordinary 12 point spanners will not get a good grip. I use a six point socket and an impact tool to undo them. It was hard work and almost impossible before I learned this method. That's why I'm going to use the local monoculture. That'll be interesting
|
|
|
Post by ajm on Apr 13, 2024 20:41:55 GMT 1
I meant motoculture. Pedant!
|
|
|
Post by ajm on Apr 23, 2024 11:33:00 GMT 1
Contacted my man, he rang yesterday, came to the house, took the old blades off and is coming this afternoon to fit the new ones. Brilliant.
|
|