13
2013 & 2014 series Pneudraulic Installation Tools
(HK978)
Fill and Bleed
This section documents the “bleed-&-fill” procedure.
For
component identification, see
Figures 3–5.
REQUIRED EQUIPMENT
DEXRON
®
III or equivalent ATF (See
Specifications
for
more information.)
• Shop air-line with 90–100 psi (
6.2–6.9 bar
) max.
•
Air regulator
• Fill Bottle Assembly (P/N
120337
, included with tool)
• Large flat-blade screwdriver
• Nose assembly or optional
stall nut
NOTE
:
The stall nut is used to
load the tool during bleeding
and for measuring tool stroke.
Stall nuts are available from
Huck (P/Ns
124090-3
[2013
series] and
124090-4
[2014]).
• 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 3)
TO BLEED AND FILL THE TOOL:
1. Connect the 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.
3. Connect the tool to the air supply and stand it
upright. 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. When cycling the
tool, hold the fill bottle
at a right angle (90°) to
the tool (Figure 5) 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
Measuring Tool Stroke
.
If the tool stroke is less than the recommended minimum
length, remove the bleed plug and add fluid. Then
re-insert the bleed plug and re-check the stroke.
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.
Figure 3
Figure 4
CAUTION
: All fluid must be purged from
the tool before refilling. The tool stroke will
be diminished if the fluid is aerated. For
optimal performance, refill with a fluid that is
recommended in
Specifications
.
Figure 5
WARNINGS:
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 5)
Air pressure must be at 20–40 psi (
1.4–2.8 bar
)
to prevent possible injury from high-pressure
spray.
