LPGS For Kubota B2910

   / LPGS For Kubota B2910
  • Thread Starter
#31  
Everyone will have a different way to build a lpgs, and there are many designs that will work satisfactorily. You can easily see that the two I built have different shapes and materials used to build the skids. I use my lpgs quite a lot from driveways, lawns to open fields. I have picked up a few things that help with their use and will add some changes to subsequent builds. The more you use one the more important the subtle differences make.
jenkinsph,

Thanks for all your input and, as ovrszd says, taking the time to write it up and share it.

Of all the home built designs I have seen on TBN so far I like Gordon Gould's and my own the best. When I build another one it will combine some of the features of both Gordon's and mine. Just my opinion.
Just found his build thread and skimmed thru it ... will go over it in detail when I get a chance.

Like the hinge set up he used on the rear tailgate, although I'm consider making mu tailgate pin-able (in both directions)

My opinion on a few points discussed in this thread, you can take them or leave them.
Fair enough.

Skid length, short skids will work but not as well as longer skids. Motor graders have a long wheel base for a reason and the same principle applies here. There is a huge difference in how smooth you can get a driveway or field depending on how long the skids are.
Yup ... long and wide is better ... up until the point you can't pull it without loosing traction as you say below.

Blade setting is another point of interest, if all you ever do is work a gravel driveway you could set the blades 3/4" below the skids and leave them there (fixed). This would give you slightly better mixing of the fines and larger rock.
Yeah ... driveway maintenance is not my only intended use.

Actually, I'm thinking of starting a business and lawn prep/land leveling would be part of the services I would offer. Neighbor kid has been doing this on the side and, having a (more than) full time job, he seems to have more than he can actually handle.

If you do fine or precision grading and packing, the blades are better set flush, this keeps you from moving material that is where it should be.
Makes sense to me.

Before packing the ground or driveways a lpgs with the blades 1/2" above the skids will still churn up a full load of gravel very quickly because the skids will dig in the loose materials. As you pack the surface down the skids tend to ride on the surface and you move less material. The reason I choose to set my blades flush with the bottom of the skids is simple, it works on both loose and packed surfaces without a need to adjust the height.
The idea of less futzing with blade height adjustments and just getting the work done has a certain appeal ... :D

Biggest thing I learned about using a box blade for leveling was to go in overlapping circles. I did the pad (120' x 75') for our barn and when the builder put the transit to it he was impressed - it wasn't more than a couple of inches out at most. That was just by eye ... with a 4' cut into a hillside and more than 4' of ill in some spots.

Grader blades are not all the same. A good quality, heavy duty blade will cost more than a soft, thin and short one. You can pick either a single edged or double edged reversible blade as long as it is mounted properly it will work. The better quality blades will last longer than the cheap thin ones, take your pick. I agree with Richard (overszd) that you should mount the blades to their support before mounting.
Yup ... will do ... even though I'm hot to trot.

I found that 3" angle did not have enough room to allow the plow bolts and nuts to be tucked under the edge enough to prevent wearing the nuts down, 4" angle was a better fit and is what I suggest. The plow bolts are 5/8" and require these holes to be the same size and you need enough clearance to get a socket on the back side to tighten them. Once you have the angle iron and blades made up you can choose the height you want to install them.
4" angle it is then.

I can repurpose the 3/8" x 3" into the 3PH hook up and maybe some of the cross-bracing as well.

How far forward you set the skids is a consideration, when I built the smaller lpgs for the garden tractor I took this and the height of the limited category 1 hitch into consideration. I use a 12' trailer with a fold down tailgate to transport and made sure that it would fit inside, just enough room.
Can you elaborate on this a little if you get a chance.

Size of the overall land plane, you don't want to struggle too much pulling it and have your tires spin. This is a finishing tool and if you spin the tires you have a hole to fill in. Better to have one you can pull a little easier and faster, you can get the same amount of work done in the same amount of time.
Makes total sense.

A 54" or 60" width with long skids is what I would recommend for the 2910. With the optional tail gate similar to Gordon's design the overall weight should be in the 700 lb. range and is all you want to handle.
Yeah, I'm familiar with going overboard ... I have a ballast block I built out of concrete that I need to put on a diet before I break something ... :laughing:

I noted that Gordon went 5' wide x 4' 6" long ... for an L-series, which is heavier tractor than mine ... and I am familiar with loss of traction ... ;)
 
   / LPGS For Kubota B2910 #32  
rswyan,

I make a distinction between smoothing which a lpgs is good for and leveling which I use a box blade for. For leveling and grading I use a Topcon grade laser and receiver mounted to the box blade, this is a real help with building pads and grading irrigated fields. Once I get the grading done with a box blade I often run the lpgs over it to slick it up.

rswyan wrote "Can you elaborate on this a little if you get a chance."
If the skids are wider than the wheels then you can move the skids forward to reduce overhang on the rear. If you do this just make sure you can still set the first blade close enough to the front of the skids without rubbing the rear tires. Building it this way will also help provide more clearance from the cross frame which should be behind the blade.
With my smaller 4' plane and 4 wheel steer I moved the skids close to the tires with a small amount of clearance.
 
   / LPGS For Kubota B2910 #33  
Just a thought: Road graders are made as short as possible and still get full range of motion of the blade. Otherwise they could be much longer than they are.

:)

Bruce

Grader wheelbase is very calculated. Has little to do with blade range of motion. Has more to do with blade control and level operation.
 
   / LPGS For Kubota B2910
  • Thread Starter
#34  
rswyan,

I make a distinction between smoothing which a lpgs is good for and leveling which I use a box blade for.
Got it.

Right tool for the job :thumbsup:

For leveling and grading I use a Topcon grade laser and receiver mounted to the box blade, this is a real help with building pads and grading irrigated fields.
I can imagine.

I spent a whole lot of time when I did the pad for our barn trying to eye it up. Having something that provides precise feedback would have been mighty handy and I'd guess would have saved a lot of time.

Once I get the grading done with a box blade I often run the lpgs over it to slick it up.
That little extra added touch ... ;)

rswyan wrote "Can you elaborate on this a little if you get a chance."
If the skids are wider than the wheels then you can move the skids forward to reduce overhang on the rear. If you do this just make sure you can still set the first blade close enough to the front of the skids without rubbing the rear tires. Building it this way will also help provide more clearance from the cross frame which should be behind the blade.[/QUOTE]
Right.

I'm running a SpeeCo Quick Hitch which adds a few inches, so I can probably move the cross frame back a bit.

With my smaller 4' plane and 4 wheel steer I moved the skids close to the tires with a small amount of clearance.
I measured earlier and I need 54" to cover my tracks/wheels.

I also laid out the skids at a 6' (wide) spacing on the welding table ... and it looks HUGE ... :laughing:

Found an ad on craigs for 18' of 4" x 8" x 1/2" angle for $100, a little rusty but not pitted ... probably a deal (@ 340 lbs), but I'm not sure I want to mess with cutting it down to 4" x 4" ...

OTOH, zip discs are pretty cheap ... :laughing:
 
   / LPGS For Kubota B2910 #35  
I don't think I would cut it down I would use the 4x8x1/2 as is. Just make sure you maintain the 45 degree angle with the blade mounted to the 8" side. The taller blade mounting will help carry more material to drop in holes and depressions.
My 8' land plane uses a combination of three pieces of steel, an 8"x5/8" flat bar set at 45 degrees with reinforcement pieces of 3x3x3/8" angle front and back which helps add strength and weight. So there are several ways to go about this but at a minimum a piece of 4x4x3/8 flat bar will work and is a commonly available size. Another example would be if you find 6x6x1/2 or 3/4 this would also work.
 
   / LPGS For Kubota B2910
  • Thread Starter
#36  
Got the two drops split lengthwise yesterday and then had to run out to HF and grab some more zip discs.

Was able to get the two halves for the tailgate welded together last night before I knocked off:

IMG_0300.jpg

Still need to do a little more grinding on it to clean it up.

My Milwaukee grinder has been acting funny - occasionally makes a noise and throws sparks. Dunno what's up with that ... I repacked the gearboxes a while back and then replaced the brushes shortly thereafter. Anyways I set it aside and quit using it when the sparking started.

Was cutting a piece of steel off the QA plate on my bucket with the HF paddle switch grinder the other day and had a zip disc get pinched/destroyed. That locked it on there so hard that the stop pin to lock it from rotating broke the casting internally when I was attempting to get the locking collar off. I took it apart and cleaned the metal out and it still works ... but kinda a PITA to change discs/wire brushes cause ya have to use Vise-Grips. That leaves me with one grinder that is fully operational - my original orange HF slide-switch grinder ... :laughing:

Fortunately, I got a 20% Super Coupon in the mail today so I think I'm going to have to pick up another one of those paddle switch grinders ... :D
 
   / LPGS For Kubota B2910
  • Thread Starter
#37  
I don't think I would cut it down I would use the 4x8x1/2 as is.
OTOH, if I did cut it down to 4" x 4" it would yield 18' of 4" x 1/2" flat stock ...

And that could be handy ... but it sure is a lot of cutting. Might have to see if U. B. would torch it for me.

Just make sure you maintain the 45 degree angle with the blade mounted to the 8" side.
So ... the 4" side set at a 45 angle on the bottom, and 8" side set at a 45 degree angle towards the top, and rearward ?

The taller blade mounting will help carry more material to drop in holes and depressions.
Good point.

My 8' land plane uses a combination of three pieces of steel, an 8"x5/8" flat bar set at 45 degrees with reinforcement pieces of 3x3x3/8" angle front and back which helps add strength and weight.
Yeah ... I've looked at your pics a number of times and have been trying to figure out what you had going on there. Thanks for the explanation.

So there are several ways to go about this but at a minimum a piece of 4x4x3/8 flat bar will work and is a commonly available size. Another example would be if you find 6x6x1/2 or 3/4 this would also work.
Right.
 
   / LPGS For Kubota B2910 #38  
Guess I am old school but most of my cutting is done with a Victor Journeyman O/A torch. I do use a an air operated cut off tool and Makita chop saw too. Years ago I use to use a Black and Decker professional grinder all the time but now I use the lighter and smaller grinders, Milwaukee and Makita currently. Getting older I tire more easily.
 
   / LPGS For Kubota B2910 #39  
OTOH, if I did cut it down to 4" x 4" it would yield 18' of 4" x 1/2" flat stock ...

And that could be handy ... but it sure is a lot of cutting. Might have to see if U. B. would torch it for me.


So ... the 4" side set at a 45 angle on the bottom, and 8" side set at a 45 degree angle towards the top, and rearward ?


Good point.


Yeah ... I've looked at your pics a number of times and have been trying to figure out what you had going on there. Thanks for the explanation.


Right.


To clarify the above I meant that with the fingers both pointed down use the 8" finger to mount the blade the 4" should be to the rear and will not be as low to the ground. Maintaining the 45 degree angle is more important as the blades are all ground and set for this same angle.
 
   / LPGS For Kubota B2910
  • Thread Starter
#40  
Guess I am old school but most of my cutting is done with a Victor Journeyman O/A torch.
Yeah, unfortunately I'm kinda late to the game ...

I don't own a torch ... yet, anyways ...

And my experience with using one is limited ... but I'm willing to learn.

Mebbe one of these days.

I do use a an air operated cut off tool and Makita chop saw too.
Yeah ... have a little 3" Sears air-operated cut-off tool ... and a Tool Gypsy (Homier, looks like a Grizzly) 5" x 6" bandsaw ...

Also have a Sears double-blade, counter-rotating metal saw ... gathering dust somewhere up in the shop.

Years ago I use to use a Black and Decker professional grinder all the time but now I use the lighter and smaller grinders, Milwaukee and Makita currently.
My grinders are all 4 1/2" ...

Getting older I tire more easily.
Same here ...

I have some back/hip problems ... walking, standing, or bending over for any length of time is generally painful.
 

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