13
2502 & A2502 Series Hydraulic Installation Tools (
HK837
)
Alcoa Fastening Systems & Rings
D
ISASSEMBLY
This procedure is for complete disassembly of the
tool. Disassemble
only
those components necessary
to replace damaged rings and worn or damaged
components. Always replace seals, wipers, O-rings, and
Back-up rings of disassembled components. Always use
a soft-jaw vise to avoid damaging the tool.
For component identifi cation, see the Assembly
Drawings in this manual.
TO DISASSEMBLE THE TOOL:
1. Disconnect the tool’s electric trigger control cord
or air trigger control hose, and then uncouple the
hydraulic hoses.
2. Remove the nose assembly from the tool.
3. Unscrew both couplers (nipple & body) from the
hoses, and drain the hoses into a container.
4. Push rearward on the piston until the remaining
hydraulic fl uid is drained into a container. Discard
the fl uid.
NOTE
:
Do NOT remove hydraulic hoses from
tool unless replacing them.
5. Remove the protective hose sleeve from the hoses.
To reach the hose fi ttings, slide back the plastic
shrouds.
6. Model
2502
: Loosen the strain relief grommet.
Remove the switch; loosen the set screw and
carefully pry out the switch with a small screw
driver. Loosen the two wires at rear of the switch
and remove it from the cord. Pull out the cord and
remove the grommet. Disassemble the electrical
connector to replace connector, or to rewire it.
Model
A2502
: Unscrew the air trigger assembly.
Loosen the air fi tting. Pull out the air trigger hose.
Loosen the air quick disconnect and remove it.
7. Remove
the
defl ector from the end cap. Remove
the socket-head cap screw from the cap.
8. Hold a spanner wrench in the slots of the retaining
ring; loosen and remove the ring.
9. Press the piston, with unloading valve, and the end
cap out of the tool. (Figure 6 -
Piston Disassembly/
Assembly Tool
and Figure 7 -
Piston Disassembly
Detail
)
10. Slide the end cap and the unloading valve from the
piston.
11. Use a small, dull pointed “pick” to remove all
seals, wipers, O-rings and Back-up rings from
components.
The tool has been properly disassembled. Store all
re-usable
parts (screws and disassembled components)
in a clean, dry area.
TO
TO
TO
O
D
D
D
S
IS
IS
IS
S
AS
AS
AS
S
SE
SE
SE
MB
MB
MB
LE
LE
LE
T
T
T
HE
HE
HE
T
T
T
OO
OO
OO
OO
L
L
L:
WARNING: Disconnect the tool control
trigger system from the POWERIG
®
Hydraulic Unit before disconnecting the
hydraulic hoses from it. If not disconnected
in this order, serious personal injury may
occur.
