Filter
Top Products
Rev. A
Reelmaster 7000Page 5 -- 36Electrical System
Engine Coolant and Hydraulic Oil Temperature Senders
Two (2) identical temperature senders are used as in-
puts for the TEC controller to identify if either the engine
coolant or hydraulic oil temperature has reached an ex-
cessive level. The coolant temperature sender threads
into the radiator (Fig. 50). The hydraulic oil temperature
sender is attached to the 4WD/2WD control manifold at
the front of the machine (Fig. 51).
Testing
1. Park machine on a level surface, lower cutting units,
stop engine and engage parking brake.
2. Before disconnecting temperature sender for test-
ing, the sender and its circuit wiring should be tested as
a TEC input with theDiagnostic Display (see Diagnostic
Display in the Troubleshooting section of this chapter).
If the Diagnostic Display verifies that thesender and cir-
cuit wiring are functioning correctly, no further sender
testingis necessary.If, however, theDisplaydetermines
that the temperature sender and circuit wiring are not
functioning correctly, proceed with test.
3. Locate temperature sender that is to be tested. Dis-
connect wire harness connector from sender.
4. Thoroughly clean area around temperature sender
and remove sender.
5. Put sensing end of sender in a container of oil with
a thermometer and slowly heat the oil (Fig. 52).
CAUTION
Handle the hot oil with extreme care to prevent
personal injury or fire.
NOTE: Prior to taking resistance readings with a digital
multimeter,short the meter test leads together. The me-
ter will display a small resistance value (usually 0.5
ohms or less). This resistance is due to the internal re-
sistance of the meter and test leads. Subtract this value
from from the measured value ofthe t ested component.
6. Check resistance of the sender with a multimeter
(ohms setting) as the oil temperature increases. Re-
place sender if specifications are not met.
OIL TEMP
SENDER RESISTANCE
68
o
F(20
o
C) 11.6 to 13.5 kilo ohms
140
o
F(60
o
C) 2.3 to 2.5 kilo ohms
212
o
F (100
o
C) 605to669ohms
7. After allowing the sender to cool, install sender:
A. Install new O--r ing on sender and thread sender
into port.Torque sender tovalues identified incorrect
illustration (Fig. 50 or 51).
B. Connect wire harness connector to sender.
8. Check and fill system(coolant or hydraulic) to proper
level.
1. Radiator 2. Coolant temp sender
Figure 50
1
2
9to11ft--lb
(12.3 to 14.9 N--m)
Figure 51
1. 4WD/2WD manifold 2. Oil temp sender
1
2
20 to 26 ft--lb
(27to35N--m)
Figure 52