PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
I N S T R U M E N T
2C10
10-78. OIL TEMPERATURE INDICATOR.
10-79. GENERAL. The oil temperature indicator is mounted in the instrument cluster 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.
10-80. ENGINE OIL TEMPERATURE GAUGE CALIBRATION. A calibration chart has been included for use
in verifying that the suspect faulty gauge is within tolerance.( Refer to Figure 10-6 .) The gauge may be checked
as follows:
—Note—
Actual recalibration of the gauge must be preformed by the
manufacturer or an approved instrument repair facility
a. With the instrument installed in the aircraft, the aircraft power connected (14 VDC ) and the ground
connected.
b. 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)
c. If the gauge does not meet the tolerances set forth in the chart, it must be replaced or recalibrated.
d. Reinstallation is the reverse of the procedure used to remove it
CALIBRATION CHART
GRADUATION
OHMS
DEGREES
TOLERANCE *
DOT
MECH. ZERO
-40*
±1/2
75°F.
903 OHMS
-331/2°
±1
180°F.
100 OHMS
+12 1/2°
±1
245° F.
36 OHMS
+35°
+1 -0
*—NOTE—
TOLERANCE IS IN
POINTER WIDTHS
75 180 245
SEND IGN
14 VDC
OIL TEMP.
Figuer 10-6 Oil Temperature Gauge