Toro Reelmaster 5010- H - Page 35

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Figure19
3.Wait10minutestoallowtheenginetocoolandmeasuretheresistanceacrossthepinsofthetemperature
senderagain.Astheenginecools,theresistanceacrossthepinsofthetemperaturesendershould
increase.
Note:Thefollowingtableshowssampledataacrossawiderangeoftemperatures.Noticethatascoolant
temperaturedecreasesfrom240°Fto200°F ,thechangeinresistanceacrossthepinsofthetemperature
senderislessthanhalfanohm.
Temperature
TemperatureSenderResistance
68°F(20°C)
11.4to13.6ohms
86°F(30°C)
7.4to8.75ohms
104°F(40°C)
4.9to5.75ohms
140°F(60°C)
2.3to2.6ohms
200°F(95°C)
0.74to0.83ohms
220°F(105°C)
0.56to0.63ohms
240°F(115°C)
0.42to0.47ohms
Pass
Astheenginecooled,theresistanceacrossthesenderincreased.GotoStep4.
FailAstheenginecooled,theresistancethroughthetemperaturesenderdidnotincrease.Replace
thetemperaturesenderaccordingtotheprocedureoutlinedintheComponentT estingsectionin
Chapter5ofthe5010-HServiceManual.GotoReturningtheMachinetoService(page22)and
followthestepslisted.
Step4:Testthetemperaturesenderwiring.
1.Removetheaccesspanelfromtheoutercoverofthecontrolarm(Figure20).
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