5
BTT35LS BOBTAIL Installation Tool
Alcoa Fastening Systems
An electric trigger switch controls the PULL and
RETURN strokes of the tool. As the trigger is pressed,
hydraulic PULL pressure is directed to front sides of
both pistons, moving them rearward. Fastener
Installation begins.
When the fastener installation is complete, the trigger
is released, causing the hydraulic units combination
valve to redirect the hydraulic RETURN pressure to the
rear side of the front piston moving it forward. The nose
assembly, with the tool, is pushed off the installed fas-
tener.
As the pistons reach the end of the RETURN stroke,
hydraulic pressure increases causing the hydraulic unit
idler valve to move to idle position (in Model 918) or
automatically shut off (in Model 940). The tool is now
ready to install another fastener.
P
P
RINCIPLE
RINCIPLE
OF
OF
O
O
PERATION
PERATION
HUCK Model BTT35LS is a Hydraulic Installation Tool
that installs and removes BOBTAIL fasteners in limit-
ed clearance applications.
This tool design consists of a cylinder housing with
two chambers to accommodate two tandem pull pis-
tons. This feature increases pull capacity while main-
taining optimum centerline-to-edge clearance and
lightweight.
The tool is intended for use with Huck standard indus-
trial POWERIG® Hydraulic Units (models 913H, 918,
d 940, and 968) or equivalent - sold separately.
Except for nose assembly, tool is complete with
hydraulic hoses, couplings and electric control cord
ready to be attached to POWERIG® Hydraulic Units
hoses and control cord.
D
D
ESCRIPTION
ESCRIPTION
CAUTION: Huck recommends that only Huck
POWERIG® Hydraulic Unit be used as the
power source for Huck installation equip-
ment. Hydraulic power units that deliver
high pressure for both PULL and RETURN,
and are not equipped with relief valves are
specifically not recommended, and may be
dangerous.
Main Housing
Front Piston
Rear Piston Rear Piston Shield
Trigger
Front of Tool
Figure 1