Case 580SR Service Manual page 950

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TRANSMISSION OIL TEMPERATURE GAUGE
The oil temp gauge indicates transmission oil tem-
perature from 75 °C to 115 °C.
This gauge is broken up into two ranges, green and
red. The green zone is 75 °C to 106 °C.
The red zone is from 105 °C to 115.5 °C.
This gauge will be connected to a sensor that will
provide a specific resistance to correlate to a specif-
ic oil temperature.
Gauge
Gauge indication range +75 to +115 °C
Green field
Red field
Z 5 V = 75 °C.
The CL of the pointer will be ±2 angular degrees of
the centerline of the tick mark that indicates this
temperature.
Z 2.6 V = 93.3 °C.
The CL of the pointer will be ±3 angular degrees of
the centerline of the tick mark that indicates this
temperature.
Z 2.05 V = 115.5 °C.
The CL of the pointer will be ±2 angular degrees of
the centerline of the tick mark that indicates this
temperature.
The same range of temperature is used for power-
shift and powershuttle transmissions. The gauge
will move 9 angular degrees at key-on in the clock-
wise position to replicate the current production
cluster behavior. This is necessary due to the cool
temperatures present when the unit is working in
backhoe position. In case the sender is disconnect-
ed, the gauge has to go down to home position. Re-
connecting the sensor will make the error code
inactive and the gauge has to return to the correct
position. Both the movements have to be uniform.
A stepper motor will drive the transmission oil tem-
perature gauge. The gauge accuracy should be less
than or equal ± 2%. Needle calibration has never to
be lost for any external condition. During cranking,
the needle movement shall be frozen in order to in-
hibit any spurious movement of it.
SECTION 55 - ELECTRICAL SYSTEM
Temperature
+75 to +105 °C
+105 to +115 °C
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