Case 435 - Sensing System Filter Restriction Sensor - Testing (A.10.A.95.94 - G.40.A.20); Sensing System Temperature Sensor - Testing (A.10.A.95.90 - G.40.A.20); 435, 445, 445 Ct

DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM
Sensing system Temperature sensor - Testing (A.10.A.95.90 -
G.40.A.20)
435, 445, 445CT
NOTE: For wirin g diagram refer to Wiring harness - Electrical schematic frame 06 (A.30.A.88 - C.20.E.06)
N°
Te st Point Expected Result
Other Result (Possible Cause)
1
Disconnect the connector from the
hydraulic oil temperature sensor
and use a voltmeter set to read
resistance.
Measure resistance from sensor
terminal to machine frame .
For oil temperatures greater than
(60 °F) and less than (212 °F) th e
sensor resistance should measure
between 4300 ohms (60 ° F) and
180 o hms (212 °F)
Temperature of oil outside of range
indicated. Bad sensor.
2 Reconnect the connector to the
hydraulic oil tempe rature sensor.
Remove the in strument cluster an d
disconnect the 26 pin connector
from the instrument cluster.
Measure resistance from terminal
2 to terminal 20 of the 26 pin
connecto r in the wiring h arness.
For oil temperatures greater than
(60 °F) and less than (212 °F) th e
sensor resistance should measure
between 4300 ohms (60 ° F) and
180 o hms (212 °F)
Temperature of oil outside of range
indicated. Ba d sensor. Bad wiring
to the sensor.
Sensing system Filter restriction sensor - Testing (A.10.A.95.94 -
G.40.A.20)
435, 445, 4
45CT
NOTE: For wirin g diagram refer to Wiring harness - Electrical schematic frame 06 (A.30.A.88 - C.20.E.06)
N°
Te st Point Expected Result
Other Result (Possible Cause)
1
Check between the housing of the
return filter switch an d the filter
housing.
Continuity
Bad groun
d connection between
the return filter switch and the filter
housing.
2
Check between the switch housing
and the e
ngine ground.
Continuity
Bad ground connection between the
filter housing to frame to engine.
3
Turn the key switch to the ON
positio
n.
Termin al fo r wire 261A (Y) to ground.
Approximately 12 volts
Check the circuit between the return
filter sw
itch and th e instrument
cluster. Also check the instrument
cluster.
If the r
eadings are good, replace the
return oil filter s w itch.
1 04/05/2005
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