MIL-HDBK-1164
Table 36 (Continued)
Frequency (1),
Inspection
Action
(2)
Every 3 years
Controller
Disassemble and service; clean
mechanism
venturi; paint surfaces needing
protection.
Indirect-acting
General
Clean outside; adjust packing;
W
lubricate and tighten fittings; check
knife edges; check piston travel;
repack as necessary.
Pilot valves
Disassemble, clean, and lubricate;
A
check piston travel; clean piping and
strainers; check for leaks in
diaphragm.
Controller
Disassemble and service; clean
Every 3 years
mechanism
venturi; clean hydraulic cylinders; paint
as necessary.
Mechanically
Check zero setting; adjust stop collars
M
operated loss-of-
or cable; release air from float
head gages
chamber.
Mud leg
Flush out sediment.
M
Float chamber
Remove float and clean; replace
A
mercury if necessary; check pressure
pipelines; paint interior and exterior.
M
Diaphragm-
Check zero setting; purge diaphragm
pendulum loss-of-
cases of air; check cable at segment;
head unit
remove dirt from knife edges; tighten
cam hubs on shafts; drain mud from
mud leg.
Pipelines to
Check for free flow and absence of
SA
diaphragm
encrustation.
179
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