![background image](http://html.mh-extra.com/html/gage-bilt/gb752sr/gb752sr_user-manual_555890004.webp)
4
REV. 2/14
PRINCIPLE OF OPERATION
When the lever ass’y is depressed, the pressurized air inside of the tool is released allowing spring pressure
to move the valve spool causing the air to be redirected. The air is directed to the top of the air piston ass’y,
moving it in a downward direction. The air below the air piston ass’y is then directed through the valve
sleeve and exhausted out of the bottom of the tool. Simultaneously, the piston rod ass’y connected to the air
piston ass’y is also moving down, forcing hydraulic oil up and into the front side of the head cylinder ass’y,
causing the piston to move to the rear of the head cylinder ass’y. 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 lever ass’y is released. Air pressure is then built up inside of the handle
causing the valve spool ass’y to return to its original position and reversing the sequence directing air
pressure to the rear of the head cylinder ass’y, causing the piston to move to the forward position.
AIR
PRESSURE
AIR
PRESSURE
AIR
PISTON
AIR
PRESSURE
AIR
PRESSURE
AIR
PRESSURE
OIL
PRESSURE
AIR
PRESSURE
AIR
PRESSURE
EXHAUST
AIR
PISTON
VALVE
SPOOL
PISTON
ROD
CYLINDER
HEAD
HEAD
PISTON
Image may not reflect actual tool