30
Topstone Neo Carbon OMS
31
Technical Information
Seat Post
Technical Information
Seat Post
138222 Rev 1 (03/20)
Seat Binder Inspection
The internal seat binder system consists of a sliding clamp assembly and a nut base with a
double-side adhesive holding it to a special mating surface inside the seat tube. The sliding
clamp parts can be removed when the seat post is out.
Always clean the surfaces of the sliding clamp by wiping them with a clean dry lint-free shop
towel only. Do not soak the parts, as the internal washer is lubricated with grease. Solvents
will wash out the lubricant and the assembly will have to be regreased by disassembling it
completely.
NOTICE
If the nut base has become rotated, it should be removed and re-affixed to the frame. The process is
described in the Service Instruction for the parts kit. These instructions are not provided in this manual.
We reccommend that you have a Cannondale Dealer perform the replacement.
Please Note: During first assembly of the nut base, it is important to not push on the 4mm allen
when tightening onto the seatpost. This can disengage the adhesive tape before proper bonding.
A poor bond can lead to misalignment. The 3M™ VHB™ Tape 5980 is pressure sensitive.
To inspect
1. To remove the seat post. See previous
page.
2. To remove the sliding clamp, use a 4
mm hex key and turn grub screw slowly
clockwise until the clamp is disengaged
from the nut base.
3. Use the 4 mm hex to push the clamp out
through the seat tube opening.
4. Look into the frame opening. Use a pen
flashlight. Check the position of the nut
base. See CORRECT next page.
5. If the nut base is missing, or rotated or
damaged, a replacement is required.
This service should be performed by a
Cannondale Dealer.
6. Check the condition of the clamp. The
seat post face and frame contact surfa-
ces should be smooth. If they are not, the
clamp assembly should be replaced with
a new one.
7. Clean the parts and inside the seat tube
with a dry shop towel and re-apply grease
and carbon paste as indicated.
8. Returning the sliding clamp to the frame,
using the 4 mm hex to guide it to the nut
base.
9 Turn the grub screw counter-clockwise
to engage the nut base. Make sure it is
enaged sufficiently to easily insert the
seat post into the seat tube.
1
2
3
4
5
6
CRB
-GEL
NGLI-2
NGLI-2
Identification
1. Sliding Clamp
2. Roll Pins (2X)
3. Washer
4. Grub Screw
5. Nut Base
6. Pressure Sensitive Adhesive Tape
(Double-sided)
This is INCORRECT.
The nut plate is rotated.
This is CORRECT.
Correct application
of carbon paste
and grease.
(shown disassembled)
The pressure sensitive adhesive
double-sided tape secures the
aligned nut base in the frame.
When applied the nut base and
frame should be very clean for a
good bond.
Ready to accept seat post.
