MODEL 244/244OS TOOL
HUCK FASTENERS
7
EXHAUST
HYDRAULIC
PISTON
AIR PISTON
RELIEF
VALVE
CHECK
VALVE
PULL PISTON
THROTTLE
VALVE
RESERVOIR
When the trigger is depressed the throttle valve
moves to down position, pressurized air is directed
to the bottom of the air piston, causing the piston
to move upward. The air above the piston is
exhausted and directed through the center of the
throttle valve and out the bottom of the tool . The
air piston has a rod and a hydraulic piston
attached. When the air piston rod moves upward,
a column of pressurized fluid is forced into head,
which moves the pull piston back. The attached
nose assembly moves with the pull piston spindle
to start fastener installation.
When fastener installation is completed, the trigger
is released. Air pressure with the assistance of a
spring causes the throttle valve to return to its up
position. Pressurized air is re-directed to the top of
the air piston, causing the piston to move
downward. The air from below the piston is
exhausted through bottom of tool. The rod and
hydraulic piston move downward; hydraulic
pressure is reversed and the pull piston is returned
forward. Return pressure relief valve protects tool
against pressure spikes. The reservoir replenishes
hydraulic system as needed.
P
RINCIPLE OF
O
PERATION
