
36
Lockring and Retaining Ring Installation
5 0 / 2 0 0 / 4 0 0 H o u r S e r v i c e
L o c k r i n g a n d R e t a i n i n g R i n g I n s t a l l a t i o n
Clamp the lower post back into the vise and Park Tool® AV-5 vise
inserts with the post head facing down.
Push the upper post up to expose the poppet valve housing.
Insert the poppet housing base plate lockring onto the poppet valve
housing, wrench flats facing up, and thread it on by hand.
Use an 11 mm open end wrench to hold the poppet valve housing in
position. Use a 26 mm crowfoot socket and a torque wrench to tighten
the base plate lockring to 9-10.2 N•m (79-90 in-lb).
NOTICE
Do not scratch the inner shaft with the wrench as this is a critical
sealing surface. Scratches can cause leaks.
Pull the upper post down to full extension to seat the base plate
lockring in the lower post.
Use your fingers to install the retaining ring into the bottom of the lower
tube retaining ring groove. Insert the flat end into the groove first, and
use your finger to guide the retaining ring around the end of the lower
tube until it snaps completely into the groove.
Remove the seatpost from the vise.
⚠
CAUTION
Verify the retaining ring is securely in place with a pick before
continuing. Failure to properly secure the retaining ring will result in
collapse of the upper post when weight is applied.
1
2
26 mm
9-10.2 N•m (79-90 in-lb)
11 mm
3