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 Preventive Maintenance Checks and Services - Cont.
Table 2-1.
Q - Quarterly
S - Semiannually
A - Annually
D - Daily W - Weekly M - Monthly
Items To Be
Interval
Item
Procedures
Inspected/
No.
D
W
M
Q
S
A
Serviced
CONTROLS SYSTEMS
q
a. Inspection.
Control Sub-
47
systems
(1)
Operate the systems, observe the function for
normal operational, Ahead and Astern. Recommend
Control
system supply pressure, 120 psi.
Station
(Pilothouse)
(2) During operation , check for air leaks at tubing
Control
fittings, valves, and actuator seals by using
Station
liquid leak detector. Assure all tubing is
(Engine Room)
secured and insulated from excessive vibration,
Gear Mate
check all flexible hoses for cracking, aging, or
Control
chafing.
System
Governor
(3)
With the system actuated Ahead, inspect for the
Actuator Air-
following, then check again while actuated
Prep System
Astern.
Gauge Shuttle
Valve 4-Way
(a)
The 3-position gear actuator cylinder
Transfer
should move freely without binding or
Valve 3-Way
twisting. The same is true for the
Transfer
governor actuator. Check all linkages and
Valve Shaft
adjustments for correct alignment.
Brake Panel
Ball Valve
Check all pivot points for freedom of
(b)
Governor
movement, excessive wear and corrosion.
Override
Roller-
Check valve indicator pins or stem
(c)
Operated
positions and ensure all are in proper
Valve 4-Way
sequence. (Refer to trouble locator
Valve
guide.)
Cylinder
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