Originally Posted by
muccapazza
What I'ld like to know is how do you know if you have a pre '82 w/o destroying it?
If your mod. 99 arm looks like this:
then it's the old version that needs the 23.35mm puller.
If your mod. 99 arm looks like this:
then it's the new version, and a standard 22mm puller will work.
BTW, there's no risk of destroying an old-version arm by using a 22mm puller. The tool will just drop into the hole without even engaging any threads. The danger of destroying an old-version arm comes when you try to use a 23mm TA arm puller, such as was found on one end of the old Park CCP-1 tool. The 23mm tool is just large enough to kind of engage the threads, but not large enough to engage them securely, and often results in a stripped arm.