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Garden Tractors Discussion Forum

Re: Adding angle iron to bottom of deck for vacuum

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Author 
Max

07-24-2004 09:01:31




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Usually the vacuum is related to how much air can be pulled in. For example, some manufacturers place the blade so far up into the deck that a 90 degree lift on the blade won't do any good. Others will add a lip to the edges of the deck to contain the clippings above the blades and increase the vacuum. What I have noticed on these designs was a fuzzy cut which doesn't show up for a couple of days. I've also tried adding the angle iron at different angles under the deck in relation to the blades and wasn't impressed with that either. First I would check the relationship of the lower part of the blade to the lower edge of the front and sides of the deck. The front should be about 1/8" or so higher than the blade not to excede the thickness of the blade and the sides should be about a 1/2" lower than the blade. If the sides and front are the same distance which normally insets the blade inside of the mower deck, this is why you're not getting a vacuum. If you try to just lower the blades when the distances are equal, you are then going to have problems with flying debris and projectiles. If you measurements are within the above numbers you can then measure the angle on your current blade lifts and increase that angle with new blades and then notice quite a difference. Recently I've been experimenting with some blades on my 88 and started out with 10 degree lift on the blades. My initial thought was to keep the noise down. The problem was it wouldn't pick up the grass for proper cutting and mulching on the first pass. After futile attempts to increase the vacuum by varing the blade position, I just ended up changing the lift angle on the blades. The resulting cut was good but now I must wait for the leaves to drop to ensure I didn't mess up that aspect of the mulching. I wouldn't advise just taking a torch to your current blades for this will change the hardness of the blades which may result in a brittle blade which shatters on impact.

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