Woods SB72 Snowblower: Snowblowers / Snow Plows / Removal  -- Tractor Attachments Implements 3ph Discussion Forum and Review Woods SB72 Snowblower: Snowblowers / Snow Plows / Removal -- Tractor Attachments Implements 3ph Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > Snowblowers / Snow Plows / Removal Forum

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 12-07-2007, 20:20 Post: 149064
TC24daman



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 Woods SB72 Snowblower

I just ran my new to me snowblower and when running it only throws snow just past the end of the blower at best. It was purchased new by my father in-law and only used a couple of times. I haven't investigated too deep but was hoping someone might have some info to steer me in the right direction. PTO is running at 540 and ground speed was slow, maybe too slow? The fan is about 18" and 3 blades clearance looks to be about 3/8". I would still think it would throw snow at least 20-30 ft.






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 12-07-2007, 20:38 Post: 149065
candoarms



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 Woods SB72 Snowblower

Tc24daman,

Are you sure your blower wasn't designed to be used with a 1000 RPM shaft?

Some of the blowers that arrive here from other countries are designed for use with output shafts that spin much faster than the standard U.S. 540 RPM.

If your blower is designed to be used with a 540 RPM shaft, your trouble could be with a shear pin. If the shear pin has been sheared off, the fan may still turn, but very slowly.

Check the shear pin.

Joel






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 12-07-2007, 20:44 Post: 149067
TC24daman



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 Woods SB72 Snowblower

I'll check the shear pins. I bought it from my father in law who used it on his 36hp New Holland. He bought it new from his local dealer.






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 12-07-2007, 20:45 Post: 149068
candoarms



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 Woods SB72 Snowblower

TC24daman,

My fault for not noticing that you have a WOODS blower. It is designed for 540 RPM. I should have paid more attention to your question.

Joel






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 12-07-2007, 20:47 Post: 149069
TC24daman



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 Woods SB72 Snowblower

If it was a shear pin would it throw any snow at all? We got about 12-14" on the ground when I ran it and it cleared the driveway just didn't throw it past the end of it.






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 12-07-2007, 20:53 Post: 149070
candoarms



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 Woods SB72 Snowblower

TC24daman,

Yes, it will still turn, as the shear pins don't usually shear off perfectly clean. It will still drag on the shaft enough to rotate the fan, though it will slip considerably.

I'd check the shear pin, and replace if necessary. If that is not the problem, we'll have to investigate further.

This is going to be a fairly simple repair, as there just isn't much that can go wrong with these things.

Joel






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 12-07-2007, 21:02 Post: 149071
candoarms



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 Woods SB72 Snowblower

TC24daman,

Provided that your shear pin is good........

I'm assuming that you didn't overload the tractor. A 6' blower is just a bit bigger than your tractor is rated for. If you were watching your engine RPMs, you may have noticed that it dropped off as you were blowing snow.

If this was not the case, then I have to ask if you were running your blower at the rated PTO RPM? (Usually full throttle)

Joel






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 12-07-2007, 21:36 Post: 149073
TC24daman



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It is a little big, but the deal was right. Woods says an 18-30hp is recommended. I was running at 540 and it never slowed down rpm's. The snow is lake effect which is pretty light. I noticed it seemed to throw a little better when I increased ground speed some. Almost like it wasn't pulling in enough snow to throw it. I'll be checking the shear pins first thing in the AM though.
I appreciate all of the advice and time.






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 12-08-2007, 01:18 Post: 149075
candoarms



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TC24daman,

While you're checking your shear pin, take a look at the cups located at the end of each of your three fan blades. If those cups are badly worn, or bent, they won't throw the snow as efficiently as they should.

Your blower should easily throw snow at least 20 feet. The diameter of the fan is the key here. Smaller diameter fans just don't develop enough velocity at the tips to throw the snow great distances. The only advantage a smaller fan has to offer, is the fact that they don't require as much horsepower to operate.

You'll find that if you load the cups up pretty good, the blower will operate better than if you run it empty. Try running the blower at full capacity once. When you see snow pushing up over the top, it's a sign that you're traveling just a bit too fast.

Light, fluffy snow doesn't have much weight to it. Even if you launch a feather at 500 miles per hour, it isn't going to go very far. hehehe. Even so, your blower should be able to spit it out at least 20 feet.

I try to keep the snow pushed up in front of the blower just to the point that it's trying to climb up over the top. In heavy, wet snow conditions, my tractor tends to bog down a bit, so I have to take smaller bites.....about a half-width cut.

I'm running a Kubota B2100 (21 horse) tractor, with a 5 foot blower. You have a bit more muscle to work with.

Joel






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 12-09-2007, 08:29 Post: 149111
harvey



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 Woods SB72 Snowblower

Snow Blowers like to work. You have to have a good amount of feed into the blower to make it efficient.

To test your blower and see how the effect of feed rate affects your distance. Blow straight back and keep reblowing snow straight back until tractor starts to work hard and the distance blown starts to fall off. You will notice as soon as you start getting into reblown how much more efficient the blower gets and how much farther it will blow.

I have a top of the line blower and light fluffly only goes 10' matbe. I have to really get the ground speed up to fill the fan. If the fan is full and tractor is working it will blow over 40'.






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Discussion Boards > Active Subjects > Messages as Posted > Snowblowers / Snow Plows / Removal Forum

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