5
BTT25 BobTail® Hydraulic Installation Tool (HK1098
)
The operator pushes the Tool’s Nose over the end
of the fastener until the Tool’s Puller bottoms on the
fastener. When the Tool’s Limit Switch Rod makes
contact with the end of the fastener, the Limit Switch in
the back of the Tool is activated. This sends an input
signal to the tool control. When the operator presses the
Trigger on the Tool, an input is sent to the tool control.
When both conditions are met, the tool control will turn
on the hydraulic pump, PULL pressure, for fastener
installation. The Piston moves back to start the swaging
process.
A Pressure Transmitter on the Relief Valve assembly
sends a signal to the control to indicate the “pressure
set point” has been reached and the “hold timer” can
start. The “hold timer” will keep the hydraulic pump,
PULL pressure, on until the timer times out. An external
Relief Valve will control the amount of pull pressure that
can be reached.
After the “hold timer” times out, the hydraulic pump
shifts to RETURN pressure and the Tool’s Anvil is
ejected off of the collar and the Tool is released from
the fastener.
P
rinciPle
of
o
Peration
P
rogram
c
ycle
