212 Series Tooling Alcoa Fastening Systems
7
When tool is connected to air supply, air pres-
sure holds throttle valve in up position - - air
pressure is directed to top of piston keeping it
down. Depressing trigger moves throttle valve to
down position - - air is directed to bottom of
piston moving it upward. Air from above piston
is exhausted downward through throttle valve
and exits muffler at bottom of tool. Air piston rod
is a hydraulic piston - - pressurized fluid is
forced into head moving pull piston rearward.
When fastener installation is completed, trigger
is released. Air pressure causes throttle valve to
return to its up position, reversing airflow. Air
piston and rod move down to their starting posi-
tion - - air is exhausted from below piston
through muffler at bottom of tool. As rod moves
downward and hydraulic pressure is released
from pull piston, a spring behind pull piston
returns it to its starting position.
PRINCIPLE OF OPERATION
Fig. 2
Sectional View
To Next Page
Loading...
