So I finally got the lower caliper pin for the left rear caliper from the dealer today. I was able to unbolt the lower pin and loosen the upper pin. I am having a really difficult time trying to remove that lower seized pin. Any ideas? I am able to get the pin to turn using a wrench but I can't get it to come out. I'm hitting the lip of the pin to try and get it to come out but nothing is working.
RTH-caliper pin
- Thread starter 3D FJ
- Start date
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- Thread starter
- #2
Also, in order to tighten the top and bottom pins to the retaining screw, how does one get a wrench to the hex on the pin to hold it in place so the retaining screw can be tightened? It's 18 mm, but it seems that I can't fit an 18 mm crescent because the head is too wide.
Are you trying to remove the pin from the caliper housing or simply trying to loosen it from the threads?
I think the inner is a 17mm. I ground one of my spare wrench down to fit between the caliper and flange/shoulder.
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- #5
I have to remove the pin from the housing. I had to quit for the night because it was getting dark and I hate making noise. The pin spins, but i can't seem to remove it. The other pin can slide in and out freely by hand.
You are correct. it is 17mm. I'm thinking i have to do the same.
You can get a thin 17mm wrench at a bike shop.
Have you tried to slide a flat screw driver or a long nose plier into the gap to lock the spinning bolt to the housing?
I think one of the HF 17 mm fits right in.
I think one of the HF 17 mm fits right in.
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- #8
I'm going to try all these methods after work. I'm right now more concerned about getting the seized pin out. I think i will be trying my air hammer/chisel. What i don't understand is if i can rotate the pin, how am i having such a difficult time removing it......
Rubber bushing sleeve stuck in the hole? That could provide enough grip to prevent extraction but still allow it to turn.
Try prying up on the head of the bolt with a flathead (or similar) while unscrewing the bolt.
Try prying up on the head of the bolt with a flathead (or similar) while unscrewing the bolt.
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- #10
So i got the caliper apart, I took out the pin, i changed the rotor, and now i'm on the step where i have to put everything back together.... I put brake lube on the caliper pins and insert them into the calipers... the top pin goes in freely and moves smoothly... The bottom pin, with the rubber and collar at the end, doesn't seem to want to move very freely. In fact, i almost can't put the pin in place past the rubber at the end. thoughts?
- Thread starter
- #11
This is a pic of the lower pin.
Since it was hard to come out, there can be corrosion etc., inside the bore. clean it with some brake cleaner and then wrap a higher grit sand paper on to an object that can slide into the bore and clean it. I had the same problem when I found one of the dust boot was missing on a pin.
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- #13
I want to thank all of you who answered my questions. As a followup, here's what happened. When i couldn't place the pin in smoothly, i used brake cleaner, and a properly sized drill bit (slightly smaller) and cleaned out the inside of the cavity. Using a high grit sandpaper would have been difficult because placing the sandpaper with something (ie the old pin or a small drill bit etc) would have been actually quite difficult. It still required a slight bit of force to place the caliper pin in place. I realized that this was probably because the lower caliper pin has a rubber sleeve at the end and pushing the pin in place creates a bit of hydraulic pressure so to speak with the brake lube. Needless to say, i got everything to place and thus far, all is good in my world.
Also, in order to get the caliper pin out of the bracket, i needed to use an airchisel. Didn't take a long time to do, but had i been doing it by hand, frustration, doubt and more frustration would have set in and i don't know what the outcome would have been. what i figured was, if i damage it, it's not like i can't buy another part to replace it and i would then chaulk it up to experience.
Also, in order to get the caliper pin out of the bracket, i needed to use an airchisel. Didn't take a long time to do, but had i been doing it by hand, frustration, doubt and more frustration would have set in and i don't know what the outcome would have been. what i figured was, if i damage it, it's not like i can't buy another part to replace it and i would then chaulk it up to experience.
