![background image](http://html.mh-extra.com/html/gage-bilt/gb744/gb744_installation-manual_555878004.webp)
4
Rev. 2/15
AIR
PRESSURE
AIR
PRESSURE
AIR
PISTON
AIR
PRESSURE
AIR
PRESSURE
AIR
PRESSURE
PRINCIPLE OF OPERATION
When the air actuator assy is depressed, the pressurized air inside the tool is released allowing spring pressure to move the valve
spool assy causing the air to be redirected. The air is directed to the top of the air piston, moving it in a downward direction. The air
below the air piston is then directed through the valve sleeve and exhausted out of the bottom of the tool. Simultaneously, the piston
rod connected to the air piston is also moving down, forcing hydraulic oil up and into the front side of the cylinder head, causing the
piston to move to the rear of the cylinder head. The internal components of the attached nose assembly are also moving with the
piston to start the fastener installation. When the fastener installation is completed, the air actuator assy is released. Air pressure is
then built up inside of the handle causing the valve spool assy to return to its original position and reversing the sequence directing
air pressure to the rear of the cylinder head, causing the piston to move to the forward position.
OIL
PRESSURE
AIR
PRESSURE
AIR
PRESSURE
EXHAUST
AIR
PISTON
VALVE
SPOOL
PISTON
ROD
CYLINDER
HEAD
HEAD
PISTON
Image may not reflect actual tool