I need help putting some old Manitou shock back together. Here's a couple photos:
As you see they're pretty darn old, they were made for canti's. What I'm trying to do is just a simple rebuild, not refurbishment, just clean it up as best I can and put it back together. These are going on a bike I don't want to spend money on that has even older forks that are completely busted.
Let me describe the situation: I took these apart and a good amount of oil came out of the lower leg in the photo. The upper leg, someone put in something caustic or something because the bumper on the bottom there has disolved quite a bit. There was a bunch of black gunk around it and the bumper isn't solid any more. Inside the lower leg is a spring and another bumper or two, like the upper leg's insides, but a shorter stack. What I mean is that bare metal rod on the lower assembly, if it would have come out altogether would have a spring and a bumper on it like the upper assembly, but it's not as long.
I have a maintenence book that shows an example of a sprung fork being rebuilt and basically the directions are to grease the springs, inject oil into the bottom of the legs, screw in all the screws so it doesn't leak out, then inject oil into the upper part of the legs and seal everything back up. So what I was thinking I'd do is this: try to get a new bumper that will work well enough to replace the disolved one (it seems to be the bottom-out bumper). Grease the springs, put the assembly's back in the legs, put oil in the bottom, put oil in the top, put back together, lube the stanchions with a teflon lube, call it good.
Does that sound about right? But- if I grease the springs with say Phils, if oil gets through won't it thin out the Phil's too much? So should I grease with a synthetic grease?
Help would be appreciated. It's an older bike but actually pretty nice- chromo frame, LX components, but this isn't going to be my permanent ride so I just want to get it going with the fork I have on hand. Thanks.