Alcoa 200 - Component Disassembly and Assembly; Head Disassembly and Assembly

200 Series Tooling Alcoa Fastening Systems
28
H
H
EAD
EAD
D
D
ISASSEMBLY
ISASSEMBLY
AND
AND
A
A
SSEMBLY
SSEMBLY
HEAD DISASSEMBLY
Normally, it should not be necessary to completely
disassemble the head assembly. However, in time the
O-ring seals may wear and the tool will not function at
maximum capacity. The following steps give complete
instructions for disassembly.
1. Unscrew rear gland (2-25), using Gland
Wrench 100556. Examine rear gland interior
quad ring (2-27) for cuts or extreme wear.
Also examine rear gland exterior O-ring (2-
29) and back-up ring (2-30). Replace these
rings where necessary.
2. Remove washer (2-24) and pull piston (2-21).
(Push on threaded end of pull piston.) Exa-
mine piston quad ring (2-22) and two back-up
rings (2-23), and replace if cut or damaged.
3. Pull piston cylinder (2-18) may not be re-
moved by pushing on projecting end of shift
piston (2-12). Be careful not to damage inside
of nose gland (2-7) or to cut quad ring (2-8)
in nose gland. Shift piston locator (2-17) will
slide out with the pull piston cylinder. Check
all quad rings for damage.
4. Remove nose gland (2-7) by pushing on the
threaded projecting end. Return pressure
relief valve is removed by unscrewing retainer
(2-44). Relief valve spring (2-48) and ball
(2-47) can now be removed. Check O-ring
(2-45) and back-up ring 02-46) on relief valve
retainer for damage.
5. Disassemble bleed valve from both ends of
head housing. Remove retainer (2-35) at front
end of housing. Next, remove spring (2-34)
and balancing valve (2-33). Valve cone face
should be free of score marks. Do not
remove valve seat (2-4) unless it appears to
be damaged. Check (2-36) O-ring for dam-
age.
6. Remove retaining ring (2-43) and unscrew
bleed screw (2-40). Push out plunger (2-37)
from other end with small diameter rod.
Check all O-rings and quad rings for damage.
7. Unscrew ball check screw (2-49) and remove
ball check spring (2-52) and ball (2-51).
Check O-ring (2-50) for damage. Do not re-
move ball check seat (2-2B) unless it appears
to be damaged.
8. Unscrew ball check screw (2-53) and remove
ball check spring (2-52), guide (2-31) and ball
(2-51). Check O-ring (2-54) for damage. Do
not remove ball check seat (2-2A) unless it
appears to be damaged..
HEAD ASSEMBLY
Before assembling head assembly, clean all parts
thoroughly with mineral spirits and lubricate
lightly with LUBRIPLATE NO. 130A. Then
assemble, taking care not to damage seals and fol-
lowing figure 2. Assemble Ball Check assemblies last.
NOTE
Do not assemble O-ring (2-29) to gland (2-25).
Insert O-ring and then, screw in gland.