TM 5-3810-307-24-1-1
5.
Remove the remaining hydrolock seal and
CAUTION
guide lock ring from the outside of the piston and the
O-ring and two backup rings from the inside of the
Do not damage the O-rings during
piston. Remove the rod spacer.
installation of the holding valve. If the
holding valve turns freely then gets hard
6.
Remove the cylinder head from the rod.
to turn, then easy to turn; remove the
holding valve and check the O-rings.
7.
Remove the O-ring and backup ring from the
They have probably been damaged by a
outside of the head and the wear ring, buffer seal,
sharp edge of a port.
deep Z rod seal, and wiper ring from the inside of the
head.
NOTE
8.
If necessary, remove the holding valve from
The holding valve should turn by hand
the port block.
until compression of the O-rings begins.
4.
Carefully install the holding valve into the port
INSPECTION.
block until fully seated.
1.
Clean all parts with solvent and dry with
compressed air. Inspect all parts for serviceability.
CAUTION
When installing new seals and rings,
CAUTION
avoid stretching seals or scratching the
Before installing new seals and rings,
grooved or gland surfaces.
clean all surfaces and carefully remove
burrs and nicks.
Parts displaying
NOTE
excessive wear or damage should be
replaced.
Lubricate new seals and rings with clean
hydraulic oil.
2.
Stone out minor blemishes and polish with a
fine crocus cloth.
5.
Install the wear ring into the head
3.
Clean with solvent and dry with compressed
air any parts that have been stoned and polished.
4.
Inspect the barrel carefully for scoring.
ASSEMBLY.
NOTE
Steps 1, 2, 3, and 4 are used only if the
holding valve has been removed.
1.
Check the inside of the port block for any
sharp edges or burrs and remove as necessary with
emery cloth.
2.
Install new O-rings onto the holding valve, refer
to Figure 2-8-22.
Figure 2-8-23. Cylinder Head Seal Installation
3.
Lubricate the holding valve and O-rings with
clean hydraulic oil.
2-8-59
