Piper SEMINOLE PA-44-180, Maintenance Manual

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OIL TEMPERATURE GAUGE.
The oil temperature indicator is mounted in the instrument cluster or in an adjacent configuration on the
instrument panel. This instrument will provide a temperature indication of the engine oil in degrees Fahrenheit.
The instrument has a temperature bulb located in the oil screen assembly, on the engine accessory section.
— Note —
With electrical power off, each gauge pointer should center ±1/2 a needle width on the
dot. When positive 14 VDC is applied to the bus, the gauge should indicate the
approximate known temperature.
TROUBLESHOOTING OIL TEMPERATURE GAUGE.
CHART 7903. OIL TEMPERATURE GAUGE
REMOVAL AND REPLACEMENT.
Refer to the General section of Chapter 77 for Removal of cluster mounted instruments.
OIL TEMPERATURE GAUGE CALIBRATION. (PA-44-180 S/N 44-95001 and up)
A calibration chart has been included for use in verifing that the suspected faulty gauge is within tolerance.
Actual recalibration of the gauge must be performed by the manufacturer or an approved instrument repair
facility.
1. With the instrument installed in the aircraft, the aircrafts’ power connected (14 VDC) and the ground
connected.
2. Remove the connection to the terminal marked SEND and connect a specified amount of resistance as
indicated on the chart, by use of a fixed resistor or a test unit capable of simulating the resistance indicated
on the chart (Power Resistor Decade Box).
TROUBLE CAUSE REMEDY
Instrument fails to show Broken or damaged bulb. Check engine unit and
any reading. Wiring open. wiring to instrument.
Excessive error. Improper calibration Replace instrument.
adjustment.
Pointer fails to move Broken or damaged bulb Check engine unit and
as engine is warmed up. or open wiring. wiring.
Dull or discolored Age. Replace instrument.
marking.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
7 9 - 3 2 - 0 4
Page 79-05
Revised: May 15, 1989
3I7
PIPER AIRCRAFT