Contructing the Backhoe Bucket

Start with two plates cut according to the dimensions in the Fig. The large piece in the center is called a “Bucket Side Plate”. Two are required to complete the Bucket. The two smaller triangles at the bottom were designed to be 30/60/90 triangles. The 30/60/90 triangles should control/drive the linear dimensions.

Cut a single 8"x16" plate according to the dimensions in the Fig. below.

Note: that the holes are centered horizontally but are not centered vertically.

If a tolerance is built in on Step 9 and 11 than a tolerance must also be built into the hole placement to ensure proper mounting.

Acquire two ½” thick steel plates that are 8”x16”, one plate that is 4”x16”, and one plate that is a 16” square.

The plates will be welded together as shown in the Figs. below. The angles of the plates are symmetrical.

From the square plate to the adjacent plate (the plate without holes) the angle is 150 degrees. From the 4” plate to its adjacent plate (the plate with holes) is also 150 degrees. From the remaining 8”x16” plate to the two adjacent plates the two angles are 120 degrees.

The plate with the holes must be oriented properly. The side with of the plate with two holes must be attached to the 8” plate. The side of the plate with one hole must be attached to the 4” plate.

Once all the plates are welded together the component is called the “Bucket Body”.

Assemble and weld the two Bucket Side Plates onto both sides of the Bucket Body. Optionally the corners may be ground smooth. Once welded together the component is called the “Bucket”.

Don't forget to cut the holes to match the Tooth SubAssembly as shown in Step 5. See note on Step 13.

Cut an piece of angle iron according to the dimensions shown.

Cut out five teeth. The 4" dimension of the tooth is NOT critical. The tooth may have any desired length. The 1" inch height dimension is set to match the height of the angle iron of the previous step.

Weld teeth onto the angle iron as shown. The dimensions are on center.

Cut a Quick Assembly Bracket according to the dimensions shown.

Two Quick Assembly Brackets are required.

Cut out a "Quick Attachment Bracket B" according to the dimensions shown.

The 6 inch length may be extended slightly (approx. 1/8") to allow for easier insertion and removal of the Quick Attachment Mounting Plate.

Cut out the "Quick Attachment Bar" according to the dimensions shown.

Two Quick Attachment Bars are required.

Assemble the brackets as shown and weld together.

The interior must be square. Avoid welding the interior joints. If welding of the interior joints is necessary then be sure to grind down the interior surfaces to be flat and square.

The 5 inch dimension is minimum clearance. For easy insertion and removal a tolerance should be included. Any tolerance built in would affect Step 2 and Step 9.

Attach the Quick Attachment Bars as indicated in the figure. Weld as necessary, keeping the interior surfaces smooth and square.

Assemble individual subassemblies together as shown.

If the bolt holes are to be drilled, it may be desirable to postpone drilling them until the final assembly to insure proper alignment.