And, at the 3rd level of propedal I can't compress it by hand.Ĭlose-up of the CM3461 installed on the RP23. When set to the 1st level of propedal there's a noticeable "shelf" that you must press past before the shock resumes normal compression. With propedal open the shock is silky smooth on the compress and rebound stroke (rebound actually works, also). Then, remove the pump from the valve.Ĭycling the shock by hand (with no positive air pressure), I'm amazed at how well it works. Feels good, doesn't it?īefore disengaging the pump from the valve, use a wrench and give it another 1/2 ~ 3/4 turn to compress the puck and help lock in the air. Replace the ball and set screw (don't cycle that shock). Using a hypodermic needle, I injected additional 5wt fluid in until all of air was out. Then I depressurized the IFP chamber (do not cycle the shock with the IFP chamber depressurized, you'll screw up the IFP depth) and removed the set screw and ball bearing on the cap to access the reservoir. Once pressurized, I compressed the shock several times (open, and in each of the propedal modes) to try and dislodge any air trapped in the shim stack. Regular old air works fine in the RockShox IFP chambers, I'm sure it'll work fine in here also. Although pure nitrogen is called for, I used a custom blend (78% nitrogen, 21% oxygen, 1% other) in my shock. Then I carefully screwed on the cap and filled the IFP chamber to ~400psi.
![fox float rp23 propedal service fox float rp23 propedal service](https://i.ebayimg.com/thumbs/images/g/14oAAOSw50JhwT2N/s-l225.jpg)
I set the IFP to the proper depth (2.25" in my case) and filed the reservoir with 5wt fork oil. This was a nice discovery as it gave me a 2nd level of protection from air leaking out of the IFP chamber (compressed rubber puck and the valve core). And, if I turned the CM3461 another 1/2 ~ 3/4 turn, the puck would compress enough that I couldn't pump any air into the IFP chamber. Still works fine, though.Īfter some playing around, I determined that if I screw in the CM3461 finger tight, and then give it another 1/2 turn with a wrench, I could pump air into the IFP port without any leaks. You should note that the schrader valve on the CM3461 is long enough that the high pressure pump doesn't engage with the valve core. Drilled a 1/16" hole in the puck, reinserted it, and screwed in the CM3461 on top where the set screw was previously. I removed the IFP port set screw and rubber puck. It showed all of the torque specs and the IFP depth necessary. More searching and I found the exploded diagrams for my RP23.
Fox float rp23 propedal service manual#
I went out and bought one at my local auto-parts store for $7.99.įox doesn't publish a manual for servicing the IFP chamber. Since I didn't feel like slumming around the local pick-a-part salvage yards, I started googling Ford fuel rail diagrams and determined the part was a Motorcraft - EFI Auxiliary Valve (CM3461). Over on emptybeer, there was a sharp-eyed fellow who realized a fuel rail pressure relief valve from Ford V8 engines had the same threading as the 4mm IFP set screw. I wanted to spend as little money and time as possible on this experiment. This shock (as well as many others in the Fox lineup) requires a nitrogen needle, a slotted 4mm hex wrench, and a replacement rubber puck to re-inflate the IFP chamber. Much reading of the interwebz suggested the IFP chamber had lost pressure.
![fox float rp23 propedal service fox float rp23 propedal service](https://www.rczbikeshop.com/media/catalog/product/cache/36/image/480x/602f0fa2c1f0d1ba5e241f914e856ff9/p/h/photo-23808.jpg)
I figured the worst that would happen is I just put everything back together ("as-is") and then send it off to Push. Finally, I decided to try and fix it myself. That certainly would have been the easiest thing to do. I considered sending it off to Push for a rebuild. With no air in the positive chamber, I could compress the shock by hand and feel the propedal switch had no effect on shock. In the Fox RP23 shock I had, the propedal was not at all propedally.
![fox float rp23 propedal service fox float rp23 propedal service](http://img.xooimage.com/files28/6/2/0/p1000124-17b7c65.jpg)
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