Vesatoro
Cannondale Fan
Without the upper shaft gland, when the damper is upside down, the oil will flow through the rebound damping channel (those small holes on both sides of seal B in your photo). There must be oil from A to C. And it leaks at C without the shaft gland. Without the oil filling A to C, the oil will start to have air bubbles in it when the damper works, and the the oil becomes foamy -> damper cavitates and does not work.Inside the fork there is piece of aluminium rather like a washer that divides the lower third of the leg - this is the damper section.
View attachment 669408
This ‘screw’ goes onto the bottom of the damper section with a fibre washer between it and divider. The oil is contained in the lower third and the elastomers sits against the back of the screw.
View attachment 669409
Your previous comments have been helpful because I’d have looked at the fork and puzzled this all out. The fork is filled upside down and at a slight angle so the air can bleed out as you screw the dampener assembly back on.
I have some oil and a pack of fibre washers and as soon as I find the 1/8” ball bearing I will put back together.
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