2600 series Hydraulic Tooling
(HK914)
Alcoa Fastening Systems
5
Piston
Trigger
Switch
Depressed
Hydraulic
Hoses
RETURN
side
PULL
side
Pressurized
Hydraulic Fluid
Return
Hydraulic Fluid
Piston Travel
Trigger
witch
Depressed
H d
li
Dump
Valve
H
Du
Va
Piston
Trigger
Switch
Released
Hydraulic
Hoses
RETURN
side
PULL
side
Piston Travel
Trigger
witch
Released
H d
li
Dump
Valve
Pressurized
Hydraulic Fluid
Return
Hydraulic Fluid
Pull Pressure
(Pull Cycle)
When the Trigger Switch is depressed,
pressurized hydraulic fluid moves
through the PULL hose to the front side
of the Piston. The piston and nose
assembly collet move rearward, installing
the fastener. When the Piston reaches
the end of the PULL stroke, it uncovers
flats on the back of the Dump Valve.
These flats are designed to provide a
passage for hydraulic fluid from the PULL
side to the RETURN side of the Piston,
unloading or “dumping” the pressurized
fluid back to the Powerig tank.
Return Pressure
(Return Cycle)
When the trigger is released,
pressurized hydraulic fluid is directed to
the rear side of the Piston, causing the
Piston and collet to move forward,
allowing fluid on the PULL side to flow
back through the PULL side hose to the
Powerig tank, and pushing the nose
assembly and tool off of the swaged
(installed) fastener. When the Piston
reaches the end of the RETURN
stroke, pressure is built up, causing the
Powerig to shut off, completing the
cycle.
P
P
RINCIPLE
RINCIPLE
OF
OF
O
O
PERATION
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