install reset gear to reset Brother toner cartridge TN-421 , tn-423 Brother MFC-L8900CDW

How to reset brother toner cartridge and get another 500-800 pages more.
For Use in cartridge:
Brother TN-423, TN-446 TN-436 , TN-431
Printer Compatibles :
Brother HL-L8260CDW
Brother HL-L8360CDW
Brother HL-L8360CDWT
Brother HL-L9310CDW
Brother MFC-L8900CDW
Brother MFC-L9570CDW

[@tankty6977]

The toner reset worked. it took like 4 times of hitting both buttons and then it took me to the reset page. Thank you for the help.

[@TMToner]

You are welcome!

[@Sjefke59]

@@TMToner Wher can i order the gear?

[@zsoltibitter8761]

Why do you have to use the gear reset method if you can just reset it by pushing the buttons in combination on the control panel? Whats the difference?

[@Mobin92]

Where can I get such a gear?

[@masukkotak9109]

Can it work if reset gear is not installed..?

[@Sjefke59]

Where can I order the gear?

[@MsLordenatas]

How the printer "knows" is a 4500 or 6000 or 9000 pages toner?

[@TMToner]

The gear