MIL-HDBK-1164
Table 25 (Continued)
Frequency (1),
Inspection
Action
(2)
Hydraulic-cylinder
operators
Hydraulic
Check through one valve operation cycle.
M
cylinder
Piston rod and
Oil packing; tighten packing gland if
M
tell-tale rod
leakage exists; replace packing if
necessary.
M
Waste line
Check for water flow when valve is wide
discharge
open and shut; if leakage occurs,
disassemble valve and piston, check
leathers for wear and replace as
necessary.
A
Cylinder and
Disassemble; inspect for scoring and
piston
corrosion; check cup leathers; polish any
scored areas; remove corrosion products
from piston surfaces and cylinder heads.
Pneumatic valve
Check packing and air hose; lubricate as
M
operators
necessary.
A
Check piston, cylinder, and leathers; clean
and maintain similar to hydraulic valve
operators.
Motorized valve
Operate valve and check for tight closing.
Q
operators
Change gear drive lubricant.
Quarterly or
after 500 hours
of operation,
whichever is
more frequent
Maintain electric motors as described in
par. 11.4.4.
137
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