We'll start re-assembly from inside the pillar, want to know how to take the post apart? Go here

Slide the spoke into the cam. The 138mm spoke is for 125mm posts and the 210mm spoke if for 150mm posts

Apply a small amount of medium strength threadlocker to the threads of the set screw

Turn the set screw clockwise to tighten. Tighten to 3 N*m

You may need to clamp the cam in the soft jaws to tighten the set screw. Be careful not to mar the cam or cam bushing

Apply a small amount of medium strength threadlocker to the threads of the spoke

Use an M3 hex wrench and any tool that will fit into the cable slot to thread the cable holder on to the spoke

Slide the cam spring onto the cam assembly

Lightly grease the cam and cam bushing using Slick Honey or Slickoleum grease and slide the assembly into the pillar tube

It is important to only use a light coating of the approved greases. Too much grease, or the incorrect grease can affect post function

Install the pillar cap and using an M10 hex wrench, turn the pillar cap clockwise to tighten to snug

Using the 4 screws at the bottom of the pillar as flats, gently clamp them in your vise

Tighten the pillar cap to 2 N*m

Slide the pillar bottom bushing on

Install the ball at the bottom of the pillar

Remove the 4 screws and install the cap

Install the cap, be sure to line the ball up with the hole in the cap

Put a small amount of threadlocker on each screw and tighten with a T15 Torx to 3N*m

Replace the 4 brass keys as needed

The brass keys will wear over time and may be responsible for rotational play in the post. They should be inspected for wear and replaced as needed.

If replacing the bushings on the inner tube, remove the C-clip and replace now

150mm posts use 3 bushings, 125mm posts use 2

Lightly grease each hole and the brass keys

Place the 8 balls into the pillar

Slide the pillar into the inner tube

Using your T25 or another tool that fits, actuate the post just as a cable would if the post were installed by pulling on the cable tower

While pulling the cable tower down to release the locking mechanism, carefully slide the pillar in to the inner tube

Once the balls are inside the inner tube, release the cable tower and continue sliding the pillar into the inner tube until you hear them click into the first position

Install the main seal on the outer tube

Lightly grease inside the main seal

Remember, only a light coating of grease is needed

Lightly grease the bushings on the pillar/inner tube assembly

Gently slide the outer tube over the pillar/outer tube assembly

Clean and lightly grease inside the head of the post

Next, install the head of the post making sure the brass key is properly seated in the head and in the keyway in the inner tube of the post

Wiggle the post head while pushing to install

Lightly grease each end of the spring and install the spring in to the post

The spring is not directional, so either side can go up or down

It is recommended to put the seatpost in the vise and soft jaws for this step

The spring is under preload and will eject with force if not supported while installing. Use caution!

Next, apply a medium strength thread locker (blue loc-tite) to the threads and install the spring cap by compressing the spring while turning the cap clockwise

Tighten the spring cap to snug

To tighten properly, you must insert the head of the post into soft jaws and a vise

Using an M10 hex wrench tighten to 20N*m

The main spring is located under this screw, so caution must me used when removing or tightening the screw

The head, and only the head of the post must be supported while removing this screw. Supporting the main tube or shaft of the post while turning this screw may result in damage/binding of the seatpost keys

Lightly grease the threads and install the bottom cap

Clamp the post in soft jaws

Tighten to 6N*m

Put a small amount of threadlocker on the threads of the cable tower

Slide the spacer/washer over the threads

In some cases the spacer/washer may be pressed on to the cable tower

Tighten the cable tower to 6N*m

If needed, clamp the seatpost in softjaws or use a strap wench to hold the post

Lightly grease the clamp screws and install the saddle cradle using a T25 Torx driver

Be sure to install the saddle cradle plates in the correct orientation