Instructions for Posthole Diggers for John Deere Tractors

by Kevin Mclain

The John Deere post hole diggers are designed to dig post holes by using a PTO driven auger. When the PTO is engaged, the auger turns clockwise into the ground to dig the post hole. The auger is lowered into the ground by pushing downward on the up and down hydraulic lever.The PTO shaft turns the post hole drive shaft which then turns the gear box that turns the auger. The pressure from the weight of the post hole diggers will allow the auger to sink into the ground as it is turning.

1

Position the post hole diggers so that the auger is standing up and the hitch connections of the post hole diggers are laying flat on the ground. Position the post hole digger drive shaft so that the front of the shaft is laying toward the front of the post hole digger hitch connections.

2

Back the rear of the John Deere tractor straight up to the front of the post hole digger hitch connector and the post hole digger drive shaft. Turn the tractor engine off while the transmission is still in gear. Place the wheel chocks behind and in front of the rear wheels.

3

Hook up the drive shaft of the post hole diggers to the PTO shaft of the tractor by lining up the splines of the PTO shaft with the grooves inside of the drive shaft yoke. Push the locking spring inward on top of the post hole digger drive shaft yoke. Push the drive shaft yoke completely onto the PTO shaft and release the locking spring. The locking spring will secure the drive shaft to the PTO shaft.

4

Position the top brace of the post hole diggers into the top hitch connection on the back of the tractor. Slide a hitch pin through the hitch connection and the top brace of the post hole diggers. Use a handheld sledge hammer if necessary to tap the hitch pin through the top hitch connection and the top post hole digger brace. Insert a lynch pin through the hole of the hitch pin to secure the pin so that it does not vibrate out of the hitch pin.

5

Connect the two lower post hole digger braces to the two lower sway bars on the back of the tractor. Insert a hitch pin through the sway bar holes and through the lower post hole digger brace holes to secure the lower braces to both lower sway bars. Use a sledge hammer if necessary to tap the pins through both of the sway bar holes and the lower post hole digger brace holes. Insert a lynch pin into the holes of each hitch pin to secure the pin in place.

6

Adjust the height of the post hole diggers from the adjustable bracket that connects the top post hole brace to the bottom post hole brace. Loosen and remove the bolt from the adjustment bracket with an adjustable wrench. Pull the bolt out and raise or lower the post hole diggers as needed. Insert the bolt through the necessary bolt hole to maintain the adjustment of the post hole diggers. Tighten the bolt with the adjustment wrench.

7

Remove the wheel chocks from the wheels. Crank the engine and raise the post hole diggers all the way up by pulling up on the hydraulic up and down lever. Move to the section where the hole needs to be dug. Back the tractor up to the section and lower the post hole digger auger until the pointed tip of the auger is touching the ground. Place the transmission in neutral and engage the parking brake if applicable. If not, hold the brake pedal down.

8

Engage the PTO shaft of the tractor. Slowly increase the engine speed of the tractor. The post hole diggers should now be turning. Slowly lower the auger into the ground as it is turning by slowly pushing down on the hydraulic up and down lever. Continue lowering the auger as the auger is turning until the hole is dug out.

9

Ream the hole once it has been dug out by raising and lowering the post hole digger auger in and out of the hole multiple times to remove the dirt from the hole.

10

Raise the post hole diggers all the way up and move the tractor to the next hole selection. Repeat the process to dig the hole with the post hole diggers.

Tip

  • check The increase in engine speed will increase the turning of the post hole digger auger. The higher the engine RPMs, the faster the auger will turn and the faster the hole will get dug.

Warning

  • close Always stand clear of a moving PTO shaft, turning drive shaft and a turning post hole digger.

Items you will need

About the Author

Kevin Mclain has more than 20 years of automotive, home improvement and landscaping experience. He has been writing for various online publications since 2002. Mclain has U.S. Army certification in automotive maintenance and repair, among more than 15 additional certifications related to the automotive field.