11
255 Blankdraulic Installation Tool (HK1014)
Assembly
For component identification, see Figures 1–5, & 9.
Before
re-assembling the tool:
- Clean components with mineral spirits or a similar
solvent. Inspect for wear/damage and replace
as necessary. Replace all seals of disassembled
components.
- Use the O-rings, Quad-rings, and Back-up rings
from
Huck Spare Parts Service Kit (P/N
255KIT
). Take care
not to damage the rings. Smear
LUBRIPLATE
®
130-AA
or
SUPER-O-LUBE
®
on rings
and mating parts to ease
assembly.
TO RE-ASSEMBLE THE TOOL:
1. Secure the handle
upside-down in a soft-jaw vise
.
(Figure 3) Place the inverted cylinder assembly on
the base of the handle. (The timing pin maintains
orientation.) Assemble the gland assembly with new
seals. (Note the orientation of the Polyseal in Figure
9.) Apply Anti-Seize Compound (P/N
508183
) to the
threads. Screw the assembly into the head and use a
1-3/8” socket wrench to torque it to 75–80 ft.-lbs.
2.
Clean the air piston rod (P/N
130296
) threads and
treat with apply Loctite
®
243
™
. Carefully press the
assembled air piston and piston rod (with Quad-ring
in place) all the way into the air cylinder. (Figure 3)
3.
Turn tool upright. Install Hydraulic Piston Assembly
(with rings in place) in the handle. Press from the
top of the handle without damaging seals. (Figure 4)
4.
Push screw, with O-ring in place, through hydraulic
piston and screw into top of piston rod. Hold self-
locking nut with a 9/16” socket and extension, and
use a 7/64” hex key to torque screw to 55-60 in. lbs.
Torque the self-locking nut to 28–32 ft.-lbs.
5.
Secure the head upside-down in a vise. Push the
cylinder head squarely into the cylinder, taking care
not to damage O-ring. Install the retaining ring.
(Figure 3)
6.
Position O-ring and muffler in the center of the
cylinder head. Position the gasket on the cylinder
assembly, taking care to note the direction of the lip
in Figure 3.
7.
Carefully position the muffler end cap on the gasket,
and secure the muffler end cap with the three
button head screws using a 1/8” hex key. (Figure 3)
8.
Place tool upright on a level surface. Drop the spring
into the throttle valve hole in cylinder, and push
throttle valve, with O-rings in place, into the cylinder.
9.
Assemble trigger cable and trigger pin, and slide
cable into handle. (Figure 9) Align hole in trigger with
hole in handle and install roll pin with a hammer and
punch.
10. Slide the throttle arm onto the ball end of the
throttle cable. Swing the arm until the other end fits
over the throttle valve. Push the screw through the
throttle arm and tighten with 5/32” hex key.
11.
Reinstall the air hose assembly if it was removed.
NOTE
:
If replacing the check valve seat: Push the
plug (P/N 120204, Figure 9, Section A-A), with
O-ring & Back-up ring in place, into head; insert
and tighten the screw. Install O-ring and Back-
up ring onto seat. Drive in seat assembly using a
soft drift, taking care not to damage the ball seat
surface.
12.
Assemble the pull piston with new seals that have
been lubricated with LUBRIPLATE
®
130-AA or
SUPER-O-LUBE
®
.
13.
Thread the Assembly Bullet (
P/N
123111-1
) onto
the pull piston and push entire assembly into the
head.
NOTE
:
Spacer (P/N 123112-1) is not needed for
this procedure.
14.
Assemble the front gland assembly (with O-ring,
Back-up ring, Polyseal, wiper housing, and wiper
seal), and push it into place on the pull piston.
15.
Install the O-rings and Back-up rings on the rear
gland assembly. Push the assembly into the head;
screw in the end cap and torque to 55–60 ft.-lbs.
16.
Install the O-ring and Back-up ring on the relief
valve plug. Insert the ball, guide, sleeve, spring, and
plug into the head. (Figures 1 & 9)
17.
Install the O-ring on the check valve plug. Insert the
ball, guide, spring, and plug into the head.
18. Push
pintail deflector
onto the
end of the pull
piston.
19. Screw the
bleed plug assembly (with O-ring in
place) into the handle.
20.
Install O-rings and Back-up rings on pull and return
gland assemblies; push assemblies into handle.
(Figure 5) Push head down onto handle, aligning it
with the assemblies.
21.
Place the tool upside-down in a vise, and install the
4 cap screws; torque to 170
in-lbs.
The tool is now assembled and
must be filled with
hydraulic
fluid prior to use; see
Fill and
Bleed
.
118865
Piston Assy.
121241
Self-locking
Nut
Figure 4
126079 Head Assy.
112501 Pull
Gland Assy.
112502 Return
Gland Assy.
125641 Handle
& Sleeve Assy.
500102 Cap Screws (
4
)
Figure 5
