256BT Pneudraulic Installation Tool
(HK1109)
Alcoa Fastening Systems
8
D
D
ISASSEMBLY
ISASSEMBLY
NOTE: The following procedure is for complete
disassembly of tool. Disassemble only those
components necessary to replace damaged O-
rings, Quad-Rings, Back-up Rings, and worn or
damaged components. Always use soft jaw vice to
avoid damage to tool.
1. Disconnect air hose from tool.
2. Remove nose assembly.
3. Insert Fill Tool part no. 112465 through reservoir
housing and screw into Reservoir Plunger (42)
locking it in the out position.
Figure 1
4. Unscrew Cap Screws (32) with 5/32 hex key.
Carefully lift Head (9) straight up from Handle (1),
remove Pull Gland Assy (31) and Return Gland
Assy (15) from separated Head and Handle
assembly. Remove seals from glands.
Figure 1
5. Unscrew Plug (57) of return Pressure Relief Valve
from front of head. Remove Spring (56), Valve
Guide (54), Sleeve (55) and Steel Ball (53). A
small magnet is helpful.
Figure 1
6. Unscrew Bleed Plug (33). Hold over waste oil
container and release fill tool slowly.
Figure 1
7. Unscrew Reservoir Housing (40) from head.
Remove two Springs (39). Slide Reservoir
Plunger (42) from head. Remove spacer and
Quad Ring (41). A pick may be used to remove
the quad ring.
Figure 1
8. Unscrew Plug (50) of reservoir check valve from
side of head. Remove Spring (45), Check Valve
Guide (44) and Stainless Steel Check Valve Ball
(43).
Figure 1
9. If Check Valve Seat (52) is damaged contact
your Huck representative. If Seat (52a) is
damaged it can be removed by using the
following procedure.
NOTE: If seat is taken
out it cannot be reused; it must be
replaced.
Figure 9
10.
Seat Assy (52) Removal: NOTE:
All parts in
the reservoir check valve must be removed
before Plug (51) can be removed.
Using a
3/16 Allen wrench, remove Screw (46). Insert
a #10 screw in the thread of Plug (51). Pull to
remove. Using optional Seat Removal Tool
p/n 126136 or a small drift and hammer, from
the rear side of the head, drive Seat Assy (52)
out towards the front of the head.
Figure 9
11. Unscrew Cylinder Cap (13) from Head (9)
with 1 11/16 open end wrench. U n s c r e w
Cylinder Cap (13) from Head (9) with with 1
11/16 open end wrench.
12. Remove Piston (11) through rear of tool.
NOTE: Piston should push out front and
rear gland assemblies.
13. Remove two Screws (34) from Throttle Arm
Guard (37) and remove guard.
14. Remove Screw (35) from Throttle Arm (36).
Remove throttle arm. Pull Throttle Valve (17a) out
of cylinder. Remove Spring (17d).
Figure 9
15. With a small punch and hammer, drive Roll Pin (5)
that retains the trigger from Handle (1). Remove
Trigger Pin (4). Remove ball end of cable (2) from
Throttle Arm (36), and pull cable out of handle.
Figure 9
16. Remove Bleed Plug (33) from handle.
Figure 1
51
46
31
15
32
(4)
1
45
43
44
50
55 53 54
56 57
9
13
33
256BT
U.S. PAT. 4597263
HUCK
Lock-out Position
FILL TOOL
112465
42
39
(2)
41
40
SPACER
FIG. 1
WARNING
Be sure air hose is disconnected from
tool before cleaning, or performing
maintenance. Severe personal injury may
occur if air hose is not disconnected.