Filling the damper with suspension fluid – –
It must be free of air. Manitou set this up for bleeding it fairly easily too.
1. fill it most of the way, and stroke it until you don’t see bubbles anymore. There is an inlet hole in the damper rod that should not get above the oil while doing this, or you’ll pull in more air.
2. fill it up to about half way up the threads
3. temporarily remove the O-ring from the cap nut. Note: the nut has a bleed hole in the side, and the O-ring would otherwise cover this.
4. hold the nut in a position with the bleed hole facing up.
5. rotate the fork leg onto the nut. The fork leg should be at about 45 degrees from vertical when doing this.
6. when the nut is nearly full on, it will burp out the last bit of air and fluid. At this point, install the O-ring, and tighten to 30 – 50 in-lbs. Nut us 15/16”, but used a 24mm that worked well.
I used Golden Spectro 5 Weight 85/150 Fork Oil, which worked well with the adjustment turned to minimum.
I used a white synthetic Teflon grease on areas that needed something thick for high pressures, or for sealing. For other areas, I used M-Prep which is thinner, for less drag.
One issue that came up was … in the left leg, the coil spring and blue bumper below it had to be pushed out because the spring connectors (i.e. cups) were too tight in the tube. The fork previously felt stiff to me, and I believe this is why. Using a utility knife and very fine tooth file, I reduced the diameter of these Nylon parts to make them fit.
Some people comment that this was never that good of a fork, but after this rebuild, it really performed well for a short travel fork. Now the action is very smooth, and well damped. It rolls right over rocks and roots without drawing attention to itself. Plus, it feels more progressive than the air fork I have.