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 TM 55-1905-223-24-16
Table 2-1. Preventive Maintenance Checks and Services
D - Daily
W - Weekly
M - Monthly
Q - Quarterly
S - Semiannually
A - Annually
B - Biennially
Item
Intervals
Item To Be
No.
D
W
M
Q
S
A
B
Inspected/Serviced
Procedures
9
Valves, Piping,
Turn on the ac motor in the hydraulic power pack
Fitting
assembly. Check valves, piping, and fittings for
leaks. Turn off ac motor in hydraulic power pack
assembly. Secure loose fittings. Replace defective
parts.
10
Pressure Setting of
The cross-port relief valve module is designated to
Valve
operate at 2,900 psi. Measure the settings on this
valve by following these steps:
a. Turn off ac motor in hydraulic power pack
assembly. Tag control panel "Out of Service - Do
Not Operate."
b. Temporarily install a portable gauge in place of
existing gauge.
c. Remove "Out of Service - Do Not Operate" tag.
d. Check hydraulic fluid level indicator. If fluid
is below FULL mark, add hydraulic fluid to FULL
mark.
e. Compare pressure gauge reading with pressure
setting of valve.
f. Turn off ac motor in hydraulic power pack
assembly.
g. Adjust or replace defective valve. Install new
preformed packing on replacement valve.
h. Check valve and fittings for leaks.
11
Electrical Wiring
Check electrical wiring connections as follows:
Connections
a. Turn off ac motor in hydraulic power pack
assembly. Tag stern control box control panel
"Out of Service - Do Not Operate."
b. Secure power source to stern control box at main
circuit breaker in engine control room.
2-11
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