7
2013 & 2014 series Pneudraulic Installation Tools
(HK978)
PULL STROKE:
When the trigger is
pressed, the throttle valve moves
down to the PULL position, and
pressurized air is directed to the
bottom of the air piston, causing it
to move upward. The air above the
air piston is exhausted and directed
through the center of the throttle
valve and out the bottom of the tool.
s the hydraulic piston rod moves
upward, a column of fluid is forced
into head, which moves the pull
piston rearward. The attached nose
assembly moves with the pull piston
to start fastener installation.
RETURN STROKE:
When fastener
installation is completed, the trigger
is released. Air pressure, with the
assistance of a spring, sends the
throttle valve to the up (RETURN) position. Pressurized air is re-directed to the top of the air piston, causing it and the
hydraulic piston rod to move downward. The air from below the piston is exhausted through the bottom of the tool.
The piston and hydraulic rod move downward, hydraulic pressure is reversed, and the pull piston is returned forward.
The Damper Valve restricts the flow of fluid at pin break, thus preventing “tool kick.” The reservoir replenishes the
hydraulic system as needed.
Principle of Operation
PULL Piston
Spring
Damper
Valve
Exhaust
Muffler
Air
Piston
Hydraulic Oil
Air Pressure
Exhaust Air
KEY
Hydraulic
Piston Rod
Throttle Valve
(PULL position)
Hydraulic
Piston Rod
Throttle Valve
(RETURN position)
Figure 1
Preparation for Use
This tool is shipped with a plug in the air inlet connector,
which has 1/4”-18 female pipe threads to accept an air-
hose fitting. Huck recommends quick-disconnect fittings
and a 1/4” inside-diameter air hose. The air supply
should have a filter-regulator-lubricator unit and access
to 90 psi (6.2
bar
), capable of a flow rate of 2.9 CFM
(170 l/m).
NOTE:
Quick-disconnect fittings and air hoses cannot be
purchased from Huck International, Inc. An an air hose is
included (P/N 115436) to facilitate immediate tool use.
Remove the shipping plug from air inlet connector and
add a few drops of an approved hydraulic fluid
. Screw
the quick-disconnect fitting into the air inlet connector
.
Set the
air pressure on the regulator to
90
psi (6.2 bar)
,
and connect the air hose to the tool. Press and release
the trigger a few times to cycle the tool. Disconnect the
air hose from the tool, and remove the retaining nut.
Select the proper nose assembly for the fastener being
installed. Connect the air hose to the tool and install
fasteners in a test plate of proper thickness with proper
size holes. Inspect the fasteners.
If the fasteners do not pass inspection, consult the
Troubleshooting section to investigate possible causes.
CAUTION: Do not use TEFLON
®
tape on
pipe threads. Tape can shred and break free
into fluid lines, resulting in malfunctions.
Threadmate
®
is available in a 4oz. tube from
Huck (P/N 508517).
WARNINGS:
As applicable, do not use without deflectors
or pintail bottles. If deflectors are removed
or damaged, separated pintails may eject
forcibly from rear of tool. Unshielded eyes
especially may be permanently injured.
Other severe injuries can be caused by flying
pintails.
If there is any chance of a projectile-like
ejection, always point rear of tool in a safe
direction, or be sure there is a structure that
will stop ejecting pintails.
To avoid pinch points, leave adequate
clearance for tool and operator’s hands
before proceeding. Tool moving toward
structure may crush hands or fingers
between tool and structure if clearance is
limited.
