This is the back side of press showing arm and linkage for pumping jack. The
bearing on the connecting arm are rollers from roll up garage door. They are
not hardened -so they can be welded to arm. They have never been replaced in the 3 years of use. Press is operated by the use of foot switch to turn on and
valve on jack - connected by vertical shaft to open and close jack. Springs are GM hood springs- 60-70's vintage