If you're planning on replacing the bearings, allen keys (hex wrenches) of the correct size (check what size hex is the bolt holding the cap and what are the hex size of the bolts clamping the stem to the steerer tube) are basically all you need.

If you have a carbon steerer on your fork or a carbon stem, then a torque wrench is required, and additionally carbon assembly paste.

The bearings are drop-in. They should come out quite easily and installing new ones is simply putting them carefully in.

Don't forget to put a thin layer of grease on all mating surfaces of the bearings and the frame, and the bearings and fork tube - the idea is that it protects against water ingress and grime build-up.

When assembling back (non-carbon parts) - use common sense and not only strength. First tighten the cap until there's no play between fork and frame, but the fork still spins freely, then ensure the stem is aligned with the front wheel and tighten the stem bolts until they feel tight.
For carbon parts the order is the same but tighten to specified torque.

If you don't feel comfortable doing that service on your own, ask someone for guidance or take your bike to a local bike ship (not always a guarantee of a proper job, but at least you have someone to blame if things go wrong).

If you're planning on replacing the bearings, Allen keys (hex wrenches) of the correct size (check what size hex is the bolt holding the cap and what is the hex size of the bolts clamping the stem to the steerer tube) are basically all you need.

If you have a carbon steerer on your fork or a carbon stem, then a torque wrench is required, and additionally carbon assembly paste.

The bearings are drop-in. They should come out quite easily and installing new ones is simply putting them carefully in.

Don't forget to put a thin layer of grease on all mating surfaces of the bearings and the frame, and the bearings and fork tube - the idea is that it protects against water ingress and grime build-up.

When assembling back (non-carbon parts) - use common sense and not only strength. First tighten the cap until there's no play between fork and frame, but the fork still spins freely, then ensure the stem is aligned with the front wheel and tighten the stem bolts until they feel tight.
For carbon parts the order is the same but tighten to specified torque.

If you don't feel comfortable doing that service on your own, ask someone for guidance or take your bike to a local bike ship (not always a guarantee of a proper job, but at least you have someone to blame if things go wrong).

If you're planning on replacing the bearings, allen key(s) of correct size (check what size is the bolt holding the cap and what are the bolts of the stem) are basically all you need.

If you have carbon fork tube or carbon stem, than not only torque wrench is required, but also carbon assembly paste.

The bearings are drop-in, they should come out quite easily and installing new ones is simply putting them carefully in.

Don't forget to put a thin layer of grease on all mating surfaces of the bearings and the frame, and the bearings and fork tube - the idea is that it protects against water ingress and grime build-up.

When assembling back (non-carbon parts) - use common sense and not only strength. First tighten the cap until there's no play between fork and frame, but the fork still spins freely, then tighten the stem bolts until they feel tight.
For carbon parts the order is the same but tighten to specified torque.

If you don't feel comfortable doing that service on your own, ask someone for guidance or take your bike to a LBS (not always a guarantee of a proper job, but at least you have someone to blame if things go wrong).

If you're planning on replacing the bearings, allen keys (hex wrenches) of the correct size (check what size hex is the bolt holding the cap and what are the hex size of the bolts clamping the stem to the steerer tube) are basically all you need.

If you have a carbon steerer on your fork or a carbon stem, then a torque wrench is required, and additionally carbon assembly paste.

The bearings are drop-in. They should come out quite easily and installing new ones is simply putting them carefully in.

Don't forget to put a thin layer of grease on all mating surfaces of the bearings and the frame, and the bearings and fork tube - the idea is that it protects against water ingress and grime build-up.

When assembling back (non-carbon parts) - use common sense and not only strength. First tighten the cap until there's no play between fork and frame, but the fork still spins freely, then ensure the stem is aligned with the front wheel and tighten the stem bolts until they feel tight.
For carbon parts the order is the same but tighten to specified torque.

If you don't feel comfortable doing that service on your own, ask someone for guidance or take your bike to a local bike ship (not always a guarantee of a proper job, but at least you have someone to blame if things go wrong).