Engine Coolant and Hydraulic Oil Temperature Senders
The Groundsmaster 4000--D and 4010--D use two (2)
temperature senders as inputs for the TEC--5002 to
identify if either the engine coolant or hydraulic oil tem-
perature has reached an excessive level. These send-
ers are identical. The coolant temperature sender
threads into the radiator (Fig. 62). The hydraulic oil tem-
perature sender is attached to the hydraulic hydraulic
tube on the left side of the machine (Fig. 63).
6. Check andfill system (coolant orhydraulic) toproper
level.
1
Testing
1.
connect wire harness connector from sender.
Locate temperature sender that is to be tested. Dis-
2
2.
Thoroughly clean area around temperature sender
and remove sender.
Figure 62
3.
Put sensing end of sender in a container of oil with
a thermometer and slowly heat the oil (Fig. 64).
1.
Radiator
2.
Coolant temp sender
CAUTION
RIGHT
FRONT
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
fromfromthemeasured valueofthecomponent youare
testing.
1
2
4.
(ohms setting) as the oil temperature increases.
Check resistance of the sender with a multimeter
Figure 63
A. Themetershouldindicatefrom11.6to13.5ohms
at 68oF (20oC).
1.
Hydraulic tube
2.
Oil temp sender
B. Themetershouldindicatefrom2.3to2.5ohmsat
140
oF (60oC).
C. Themetershouldindicate from0.6to0.7ohmsat
212
oF (100oC).
D. Replace sender if specifications are not met.
After allowing the sender to cool, install sender:
A. Install new O--ring on sender.
5.
B. Install sender into portand torque from 9to 11ft--
lb (12.3 to 14.9 N--m).
Figure 64
C. Reconnect harness wire to sender.
Electrical System
Page 5 -- 46
Groundsmaster 4000--D/4010--D
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