256BT Pneudraulic Installation Tool
(HK1109)
Alcoa Fastening Systems
6
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
P
RINCIPLE
RINCIPLE
OF
OF
O
O
PERATION
PERATION
O
O
PERATING
PERATING
I
I
NSTRUCTIONS
NSTRUCTIONS
For safe operation. Please read completely
WARNINGS:
●
To avoid severe personal injury:
Wear approved
eye and ear protection.
●
Be sure of adequate clearance for Operator’s
hands before proceeding with fastener installation.
G
G
ENERAL
ENERAL
Operators should receive training from qualified
personnel.
Do not bend tool to free if stuck.
Tool should only be used to install fasteners.
NEVER use as a jack/spreader or hammer.
BOBTAIL® Fastener Installation:
Place pin in workpiece and place collar over pin.
See
WARNING
. (If Collar has only one tapered end,
that end
MUST
be out toward tool; not next to
sheet.) Hold pin and push nose assembly onto pin
protruding through collar until nose anvil touches
collar. Depress trigger and hold until collar is
swaged and pintail breaks. Release trigger. Tool will
go into its return stroke. Tool/nose are ready
for next installation cycle.
•
Length of tool increases during fastener
installation. Allow adequate tool and anvil
clearance before installing fasteners.
•
Check pin for correct grip. Place pin in work
hole.
•
Place collar over pin. See WARNINGS. If collar
has only one tapered end, that end should be
outward toward tool.
•
Hold pin in hole. Push tool onto pin protruding
from collar until anvil touches collar.
•
Move hands away from pin and structure. Keep
hands away from front of tool during operation.
Tool anvil advances forward.
•
Hold tool at right angle (90 degrees) to work.
Press and hold trigger down until collar is
swaged.
•
Release trigger. Tool returns to starting position.
•
Tool is ready for next installation cycle.
WARNING: Do not pull on a pin without
placing fastener/collar in a workpiece,
and also, collar chamfer
MUST
be out
toward tool. These conditions cause pin
to eject with great velocity and force
when the pintail breaks off or
teeth/grooves strip. This may cause
severe personal injury.
CAUTIONS: Remove excess gap from
between the sheets. This permits enough
pintail to emerge from collar for ALL jaw
teeth to engage with pintail. If ALL teeth
do not engage properly, jaws will be
damaged.