14
2012 series Pneudraulic Installation Tool (HK969)
Fill and Bleed
This section documents the “bleed-&-fill” procedure.
For
component identification, see
Figures 4–4
b
.
REQUIRED EQUIPMENT
DEXRON
®
III or equivalent ATF (See
Specifications 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 124090)
NOTE:
The stall nut is used to load the tool during bleeding
and for measuring tool stroke.
- 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 4)
TO BLEED AND FILL THE TOOL:
1. Connect tool to the air supply to seat air piston at
the bottom of air cylinder; then disconnect. Lay the
tool on its side with
fill port facing up.
2.
Use a screwdriver to 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 tool
to free trapped air. Do not allow air to re-enter
tool. When cycling the tool, always hold fill bottle
at a right angle (90°) to it (Figure 4b) 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.
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.
Figure 4
Figure 4a
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 4b
WARNINGS:
Air pressure must be at 20–40 psi (1.4–2.8
bar) to prevent possible injury from high-
pressure spray.
Never cycle the tool without:
B
leed plug tightened in the fill port
Fill bottle securely attached to the tool, or
Fill port is held over a container. (Figure 4a)
When not properly contained, any fluid in the
tool will spray out. Severe injury may result.
