Lockheed C-5M, Техническое руководство

Страница: 77 / 100

The electric suction boost pump must be on for a minimum of 1 minute prior to starting the ATM and must remain
on during operation. Failure to do so will damage the hydraulic pump.
b. When operating the ATM at temperatures of -40 °F (-40 °C) and below, hydraulic pressure surges may be encountered.
Pressure surges can be avoided or reduced to an acceptable level by using the following procedure:
(1) Operate electric suction boost pumps for hydraulic systems 1 and 4 for at least 10 minutes prior to starting the
ATM.
(2) Turn on both ATM together with the following bleed air and hydraulic system con
¿
gurations:
(a) One APU supplying bleed air
(b) Both air conditioning packs operating
(c) Both cutboard PTU (1-2 and 3-4) operating
(3) Cycle on and off the respective PTU (1-2 for SYS 1 ATM, 3-4 for SYS 4 ATM) if necessary, to dampen ATM
pump output pressure surges.
(4) After normal operation is obtained, con
¿
gure bleed air supply, air conditioning, and PTU operation as required.
c. Before APU/subsystems startup, check to ensure hydraulic system reservoirs are not over
¿
lled. At very low tempera-
tures, the hydraulic
À
uid readily foams, and with over-servicing, the reservoir vent
¿
lters may clog and hinder suction
boost feed of the ATM pumps even though electric suction boost pumps are in operation.
1.5.5.8 EDS.
EDS should only be operated within the temperature range of 32 °F to 122 °F (0 °C to 50 °C). Operation of EDS
outside of this temperature range can result in damage to EDS components.
When operating at temperatures below 32 °F (0 °C), do not operate EDS until
À
ight station temperature has warmed to 32
°F (0 °C), use APU generator power for EDS operation, and avoid power transfers during EDS operation to prevent
disturbing the EDS recording program due to power surges.
1.5.5.9 IDG. When starting an engine with the IDG oil temperature below 15 °F (-9 °C), the IDG will come on line either
(1) within 60 seconds, or (2) within 5.0 to 5.5 seconds after the oil inlet temperature increased to 28 °F (-2 °C), whichever
occurs
¿
rst.
1.5.5.10 Instruments. At temperatures of 0 °F (-18 °C) and below, instruments may not function properly until the
À
ight
station temperature has warmed to 0 °F (-18 °C).
1.5.5.11 Pressurization Controls. At temperatures below 64 °F (18 °C), the pressurization controls may be damaged if
operated before the
À
ight station is warmed.
1.5.5.12 Cartridge Valves. When installing cartridge valves at temperatures of 0 °F (-18 °C) and below, allow the
cartridge valve to stabilize at the same temperature as the manifold before attempting installation.
1.5.5.13 Pitot-static Probes and Total Temperature Probes. During freezing weather, check pitot-static probes and
total temperature probes for ice. Remove ice formations with integral heaters.
TO 1C-5M-2-1
1-37