Until recent years Vulcan Pile Extractors utilized a Steel Spring and Spring Guide in the Cylinder head as shown below:

To convert older Extractors to the new configuration which replaces the Spring and Spring Guide with a Rubber Bumper the procedure is as follows:

1. Drill through at "A" 1 1/2" diameter.
2. Remove Spring Guide and discard.
3. Tap hole for 1 1/4" NPT.
4. Insert countersunk Pipe Plug 1 1/4" size.
5. Install Bumper as shown.