I’m trying to grease my Speedplay pedals, but the little end screw on one of the pedals just spins. It will not unscrew, thereby denying me access to the grease port.
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What I've done in the past is remove the screw then use a tool to pop off the plastic port. Now I use a Torx head (T25?) to unscrew the retaining screw. The body will then slide off revealing the spindle which I give a good clean with a rag and finish with degreaser. The body can then be cleaned with a series of twisted paper towels to remove the old grease. I finished with light squirt of degreaser and wipe clean.
Once I am ready to reassemble, a good dollop of water-proof marine grade grease into to the body and push back on to the spindle. You will need to wipe the excess that gets pushed out. Then replace the torx screw, nice and tight, the access port and finally the little screw. Finish with a really good rub with a rag to remocve exterior grease and you are good to go.
Don't forget to clean the cleats as well. Depending on how dirty they are, a wipe with a rag to remove dirt etc, maybe a wipe with water. Then let dry. I then use a furniture polish to lubricate.
If the screw is just spinning in place, then the thread that it engages in inside the pedal body is worn-out (metal screw and plastic thread aren't a great combo). This means that the screw is no longer apllying pressure to hold the cap into the pedal. Using something small and sharp, you should be able to lever it off to get access to the grease port.