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 TM 55-1905-223-24-10
c.
Shipping Preparations: This task covers the preparation of the hydraulic power pack removed from the vessel
(1)
Remove hand hole cover and gasket (FIGURE 1-1) from end of reservoir tank, drain residue oil from
power pack assembly on tank top.
(2)
Flush power pack assembly with petroleum solvent and dry out with compressed air. Fill pump, valves and
filter with P-10 preservative lubricating oil, Type I or II, Grade 30.
(3)
Install piping plugs in all open parts, flush external surface with cleaning solvent, dry with compressed air
and lightly spray with preservative conforming to Type P-2, also see MIL-STD-107 and MIL-STD- 129 for
guidance.
(4)
With reservoir tank drained, clean with cleaning solvent, dry with compressed air and spray interior with P-
10 Type preservative. Remove magnetic drain plug (FIGURE 1-1) and drain excess preservative, coat
hand hole cover and drain plug with P-10 preservative and reinstall. Also see MIL-STD-107 and MIL-STD-
129 for guidance.
2-37. Hydraulic Power Pack Restoration. When the hydraulic power pack is to be restored to normal service from
extended storage accomplish the following tasks.
NOTE
Systems that are preserved intact by filling with preservative conforming to MIL-H-
6083 do not generally require extensive flushing prior to becoming operational as
this fluid is, in small quantities, compatible with system operating fluid.
a. Cleaning Hydraulic Power Pack Assembly, system intact.
(1)
Accomplish tasks in paragraph 2-13. Remove expansion tank mounted over hydraulic reservoir tank.
(2)
Install new filter elements in power pack p iping and reservoir tank.
(3)
Fill system with new clean hydraulic operating fluid as per LO 55-1905- 223-12, operate system (Chapter 1
Section III) to circulate fluid throughout system piping and components.
(4)
When thoroughly circulated and system is at normal or near normal operating temperature, secure system
and repeat tasks (1), (2) and (3).
(5)
Take a fluid sample and analyze to determine fluid viscosity and minimum flash point. Compare these
values with military specification
2-72
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