13
2015 series Pneudraulic Installation Tools
(HK958)
f
ill
and
b
leed
This section documents the “bleed-&-fill” procedure. For
component identification, see Figures 2
–2
B
.
REQUIRED EQUIPMENT
•
DEXRON
®
III or equivalent ATF (See
s
pecificATions
for more information.)
• Shop air-line with 90 psi (
6.2 bar
) max.
•
Air regulator
•
Fill Bottle Assembly (P/N
120337
, included with
tool)
•
Large flat-blade screwdriver
•
Nose assembly or optional stall nut (P/N
125340
)
and stop (P/N
125341
)
NOTE
:
The stall nut is used to load the tool
during bleeding and for measuring tool stroke.
See
K
iTs
& A
ccessories
.
•
Fasteners (optional)
PREPARATION
• Install air regulator in
the air-line and set
the pressure to 20–40
psi (
1.4–2.8 bar
).
•
Add an approved
hydraulic fluid to the
fill point of the fill
bottle.
(Figure 2)
TO BLEED AND FILL THE TOOL:
1. Connect tool to the air supply to seat the air piston
at the bottom of the air cylinder; then disconnect.
Lay tool on its side with fill port
facing up.
2.
Remove the bleed plug from the fill port
. Screw the
fill bottle into the fill port. (Figure 2
A
)
3. Connect tool to the air supply and stand it upright.
4. Hold the fill bottle
at a right angle (90°) to the tool
(Figure 2
B
); cycle the tool 20–30 times; watch for air
bubbles escaping into the bottle.
NOTE
:
Rock the tool to free trapped air. Do not
allow air to re-enter the tool. Always hold the fill
bottle as shown in order to prevent drawing in
air.
4. When air bubbles stop accumulating in the fill
bottle, stop cycling the tool. When the trigger is
released, the pull
piston returns to the
idle (full forward)
position. Disconnect
the tool from the air
supply.
5. Lay the tool on its
side, and remove
the fill bottle.
Carefully add fluid
to “top off” the fluid
in the fill port. Insert
and tighten the
bleed plug.
6. Connect the tool to the air supply to check the tool
stroke.
NOTE
:
There are two procedures for
measuring tool stroke: with and without a stall
nut. See
m
eAsuring
T
ool
s
TroKe
.
If the stroke is less
than recommended
minimum, remove
the bleed plug and
add fluid. Then
re-insert the plug
and re-check the
stroke.
If the fluid level
drops, repeat steps
until the fluid level
does not drop when
the tool is cycled.
NOTE
:
This usually requires 3 or 4 repetitions.
When the tool stroke is as recommended:
a. Increase air pressure according to specifications.
b. Install two fasteners to check function and
installation in a single stroke (or cycle the tool with
the stall nut fully threaded onto the piston).
c. Re-measure the stroke.
Repeat this process until stroke is at minimum
requirement.
continued...
WARNING: Avoid contact with hydraulic
fluid. Hydraulic fluid must be disposed of
in accordance with local regulations. See
MSDS for hydraulic fluid shipped with tool.
f
igure
2
a
CAUTION
: Purge all fluid from the tool
before refilling. The tool stroke will be
diminished if the fluid is aerated.
f
igure
2
b
WARNING: Air pressure must be at 20–40
psi (1.4–2.8 bar) to prevent possible injury
from high-pressure spray.
Before cycling the tool, make sure the:
•
bleed plug is tightened in the fill port, or
•
fill bottle is securely attached to the tool
(if the bleed plug has been removed), or
•
fill port is held over a container.
(Figure
2
A
)
120336
Fill Bottle
Fill Point
120004 Cap
120337 Fill Bottle Assy
f
igure
2
