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post #1 of 1 Old 02-02-2015, 03:31 PM Thread Starter
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Join Date: Feb 2010
Location: MN
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Building an Earthcavator Clone

Hi all! I wanted a Gannon earthcavator but none were available near me so I decided to try building my own, and here is how I did it.
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I started the build using an old IH Cub push blade, but any heavy duty blade will work. The moldboard is 48" X 10" X X .25". To this was welded end plates 16"L X 12"H X .25"T
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The roll over collars/bearings are made from heavy wall tubing wall T= .25" the OD = 2.25" ID = 1.75" L = 1.0625". These were welded to the end plated centered 6" up / down and 4" from the aft end of the plate.
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The hitch arms are fabricated from flat stock 2" X .5" X 16". The axle shaft is a solid shaft 1.75" OD 1.125" L which was welded to the end of the arm. The hitch is made using 2" X 50" pipe welded to 2" X 2" .25" angle iron that's 52" L.
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The 3 PT lift tabs are welded to the 2" angle iron along with the top link mast. The top link mast is 14" H from the 2" flat stock angle cut to give it approx a 2" forward tilt. This hitch is designed for Cat 0 mounting, and all holes are 5/8".
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The roll over latch assembly: Arms, the 2" material should be 13.5" long tapered at the aft end to allow them it move up over the locking tabs. A 1.0625" notch was cut into the arm at 14.5" from the tapered ends 1.0625" deep the forward ends were drilled .75" for the connecting axle.
A .75" round shaft 54" L is supported with 4 supports [email protected] 2" X 4" material and [email protected] 1.5" X .25" X 4" flat stock. These are welded to the top of the 3 pt 2" angle.
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The locking tabs are fabricated from bar stock 1" X .5" X 2.25" L. 6 are needed and welded to each end plate. The process I used was to have the blade assembly attached to the tractor 3 pt. and raised up with the lock arms in place, then held with a C clamp. I placed the lock tab on the arm notches and tack welded it in place and then welded them solid.
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The rippers I ordered from Ag Supply : http://mower-blades.agrisupply.com/s...ug=box%20blade

P/N 86634 they are .75" X 2" X 16". I only wanted them 6" long so 10" was cut off but I did use the upper drilled ends cut to2.25" to make mounts for the rippers. The ripper mount is angle iron 3" X 3" X 3/8" X 48". This was welded to the back of the moldboard and the end plated and 4 ripper mounts were welded to the 3" angle spaced for 4 teeth.
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I wanted to be able to remove the 3 pt hitch from the blade so the hitch arms are bolted to the hitch which why the 2" pipe is 50" and the 2" angle is 52". A "nut", so to speak, was fabricated from the 2" material 2" X 2" drilled and tapped with1/2" #20 fine thread then welded to the 2" angle, and the 2" pipe for the hitch arms are drilled 1/2" and bolted to the hitch assy with 1/2 fine thread grade 8 bolts with lock washers. The cutting edges are .25" X 5 " X 48" bolted to the blade with 5 bolts.
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Another view of the ripper mount attachment

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The roll over release lever is made from 1.25" X .25" X 30" bar stock bolted to the latching axle assembly.
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The roll over latch arms again, which, as noted above, are 13.5" length.
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Also I did not use a one piece latch release axle as you can see in the above photo as it also had to be dissembled to remove the hitch. I used some 1" X 1" square tubing as a connector and which drilled 3/16" and an aircraft AN 3 bolt was used.
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As you see it in the above picture I also installed a spring on the release lever to pull it to the locked position.

GB in MN
72 Sears G16 Suburban "S3"
67 Sears Suburban 12 "S1"
48 Earthmaster Model C
60 Sears Suburban DB
66 Sears Suburban 10 "S2"
48 Ford 8N
58 Ford 641
63 Oliver 770
04 Sears GT5000
75 Sears ST 16 S4
75 Sears SB 18 S5
74 Sears SS16 S6
84 Power King 1618
76 Power king 1614
73 Power King 1614
1949 Economy Standard
1943 John Deere LA

Last edited by Brad; 02-06-2015 at 07:22 PM.
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