4.1.4 – Remove and Replace Flail-Blades

With The New Bolt’s, Bushes and Nut’s – Model-15 Blades and forward And Below That With The Old Off The Shelf Fasteners – Model-14 Blades and back.


New Custom Designed Stepped Bush and Fasteners

On this page you will find articles and videos on how to quickly remover and replace BrushDestructor Flail-Blades, while the BrushDestructor Blade is both on and off your brush cutter. I will also show why it is important to check and ensure that pivot bolt lock nuts are torqued up very tight.

Tools required two 5/8 sockets or wrench, vice-grips and a removable thread locker.

A small amount of removable thread locking compound must be used on the bolt and nut when re-assembling the fasteners as this new nut is not a lock nut.

Below are the tools required to change the flail-blades on a BrushDestructor blade.

The first two, shown at the top of the picture below, are the socket and lock pin, to remove and replace metal blades that should have come with your brush cutter.

To remove and replace the Pivot Bolt assembly, you will need a 1 x 5/8 socket and 1 x 5/8 ring spanner, or a second 5/8 socket spanner shown at the bottom.

 

This video shows you how to replace all the Flail-Blades on a Model-17 blade and includes inspection of the impact rubber stop for damage. This same process can be used going back to the Model-15 blade.

This video shows you how I used to replace the Flail-Blades one at a time on a model-15 blade. It involves the removal of the bolt and bush as well, to inspect these, but history has proven that these pivot bolt assemblies last a very long time. I recommend watching this video, but unless you need to replace the bushes, I would use the Model-17 process to replace the Flail-Blades.



Old Threaded Bush and Off the Shelf Fasteners

On this page you will find articles and videos on how to quickly remover and replace BrushDestructor Flail-Blades, while the BrushDestructor Blade is both on and off your brush cutter. I will also show why it is important to check and ensure that pivot bolt lock nuts are torqued up very tight to prevent the bush washer from rotating.

This video which is for the now obsolete non threaded bush washer, shows how to remove and insert Flail-Blades using a vice to hold an Allen key so that it is easy to undo and torque up the pivot bolt lock nut.


 Tools Required to remove and replace Flail-Blades

Minimum tools required

Shifter, some sort of pliers and a 6mm Allen Key.

BrushDestructor min. tools required to change flail-blades

Best tools for the job

13mm (1/2″) socket in ratchet handle, vice grips and a 6mm Allen socket drive in handle.

BrushDestructor, best tools to change flail-blades

Changing Flail-Blades on brush cutter
  1. Use 6mm Allen key/drive to retain socket head bolt.
  2. Use shifter or socket drive to remove lock nut.
  3. Use pliers or vice grips to squeeze threaded bush washer between top and bottom plates.
  4. Use 6mm Allen key/drive to unscrew socket head bolt out of threaded bush washer.
  5. Release pliers or vice grips and slide out flail-blade and bush washer.

Changing BrushDestructor Flail-Blades on brush cutter 2 Changing BrushDestructor Flail-Blades on brush cutter 1

Reverse procedure to re-assemble.

If you have been using the blade hard for a long period of time, the threads of the bolt can get crushed against the Top Hub pivot hole making it had to undo the socket head bolt out of the bush washer. If this is the case you will need to remove the BrushDestructor blade from the brush cutter squeeze in a vice as shown.

 

Replacing BrushDestructor flail-blades

 

This will give the extra pressure to prevent the bush washer from rotating and all you to apply the extra force required to unscrew the socket hard bolt with the damaged thread.


 

I will be doing another video in the near future, showing in greater detail how to replace and reinstall flail-blades while on and the brush cutter.