Engine Coolant and Hydraulic Oil Temperature Senders
The Groundsmaster 4000--D uses two (2) temperature
senders as inputs for the TEC--5002 to identify if either
the engine coolant or hydraulic oil temperature has
reached an excessive level. These senders are identi-
cal. The coolant temperature sender threads into the ra-
diator (Fig. 54). The hydraulic oil temperature sender is
attached to the hydraulic hydraulic tube on the left side
of the machine (Fig. 55).
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 54
3.
Put sensing end of sender in a container of oil with
a thermometer and slowly heat the oil (Fig. 56).
1.
Radiator
2.
Coolant temp sender
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
fromfromthemeasured valueofthecomponent youare
testing.
1
2
4.
(ohms setting) as the oil temperature increases.
Check resistance of the sender with a multimeter
Figure 55
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 56
C. Reconnect harness wire to sender.
Groundsmaster 4000--D
Page 5 -- 33
Electrical System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Tags | Toro Groundsmaster 30412, Toro Groundsmaster 4000 D |
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| Document Type | Catalog |
| Language | English |
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