9
254 and 254OS Pneudraulic Installation Tools (HK1172)
Disassembly
(continued)
11. Remove the screw from the throttle arm, and then
remove the throttle arm. Remove the throttle valve
assembly and spring from the cylinder. (Figure 11)
12. With a small punch and hammer, drive out the roll
pin to remove the trigger from the handle. (Figure 9)
Remove the trigger pin. Remove ball end of the cable
from the throttle arm, and pull cable out of handle.
13. Remove the bleed plug from the handle.
14. Secure the tool upside-down in a soft-jaw vise, and
remove three cap head screws from the muffler end
cap with a 5/32” hex key. (Figure 3)
15. Remove the muffler end cap, bottom exhaust gasket,
muffler, and O-ring. (Figure 3)
16. Tap the cylinder head down into the cylinder
assembly and remove the retaining ring.
17. Screw the cap screws into the cylinder head, and
carefully pry on them to remove the cylinder head.
18. Push air piston all the way down in the cylinder,
remove tool from vise, and lay on its side. Hold the
self-locking nut with a 9/16” socket and extension,
and use a 3/16” hex key to remove the Intensifier
Piston Assembly
. (Figure 4)
19. Secure the cylinder assembly and handle upside-
down in a vise again.
20. Use pliers to grip the self-locking nut and pull out
the air piston and rod assembly from the handle and
cylinder assemblies.
21. Use a 1-3/8” socket and extension to remove the
gland assembly. The handle and cylinder assemblies
will now separate.
22. Push the piston rod out of the handle.
23. Remove the Retaining Ring and Spacer (P/Ns 505939
and 123904) from the gland assembly, then remove
the Polyseal (P/N 506611). (Figure 10)
The tool has been properly disassembled. Store all
re-usable parts (screws and disassembled components)
in a clean, dry area.
Front Gland
Assembly
close-up
NOTE: Spacer must only be used for disassembly procedure
as it assists in pushing out Front Gland Assembly.
Note orientation
of polyseal
123111-1
Assembly Bullet
123112-1
Spacer
HUCK
Figure 2
Muffler
End Cap
Bottom
Exhaust
Gasket
Muffler
O-Ring
Retaining
Ring
Cap Screws
Use the screws to
pry out the
cylinder head.
Cylinder
Head
Assembly
Press air piston
and piston rod
fully into the air
cylinder to aid
in removal of
the intensifier
piston.
Self-locking
Nut
Main Gland
Assembly
Intensifier Piston
Assembly
(Must be unscrewed from
handle-side of piston rod.)
Piston Rod
Air Piston
Assembly
Handle Sleeve
Handle O-ring
Figure 3
CAUTION: DO NOT scratch the piston, rod, or
cylinder when removing.
WARNING: Do NOT re-use seals, wipers, or
rings; irreparable tool damage could occur.
Discard these parts and use replacements.
CAUTION: Always use a soft-jaw vise to avoid
damaging the tool.
