TM 55-1520-240-23-7
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MISCELLANEOUS INSTRUMENTS
(Continued)
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HYDRAULIC TEMPERATURE INDICATING SYSTEM
Description
The maintenance panel contains indicators for three
hydraulic oil temperature indicating systems. Two
systems measure temperature of the hydraulic oil in the
flight control (No. 1 and No. 2) hydraulic systems. The
other system measures temperature of the hydraulic oil
in the utility hydraulic system. Each system contains an
indicator and a temperature transmitter. As hydraulic oil
temperature varies, transmitter resistance varies. The
resistance change causes the indicator pointer to move
a distance proportional to the hydraulic oil temperature
change.
NO BREAK - WORK HARDER
The hydraulic temperature indicators, calibrated -50º to
+150ºC, are clamp mounted in the maintenance panel.
Electrical connection is provided by a receptacle at the
rear of each indicator.
NO BREAK - WORK HARDER
The hydraulic temperature transmitter senses and
transmits hydraulic oil temperature signals to the
indicator. The transmitters are calibrated to provide
90.38 ohms at 0ºC (32ºF). Each transmitter is threaded
into its respective hydraulic system reservoir cooler.
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