DescriptionThis video provides step-by-step repair instructions for replacing the drive gear on a Troy-Bilt lawn mower (model 12AVB2RQ766). The most common reason for replacing this part is if the self-driving feature is not working properly.
All of the information for this replacement video is applicable to the following brands:
Troy-Bilt
Step-By-Step Instructions1
To replace a drive gear on your Troy-Built lawn mower, you will need a 9/16 inch socket and a wood block or a comparable sturdy object.
2
Before you begin the procedure, make sure the engine has cooled.
3
Lift up the front of the mower and support it.
4
Now, using the 9/16 inch socket, unthread the nuts securing the front wheel you're replacing the drive gear for.
6
Slide off the old drive gear.
7
To install the new drive gear, reposition the wheel guard, then slide on the new gear.
8
Realign the wheel, then thread and tighten the nut to secure it.
9
Remove the support, and your lawn mower should be ready for use.