Toro 03116SL Rev E Service Manual Groundsmaster 4100 D Preface Publication

Temperature Gauge
The  temperature gauge  can  be  tested using  a  new
gauge as a substitute  or with the use of  a DC voltage
source and a variable resistance box.
Testing
CAUTION
VARIABLE
RESISTANCE
Make sure the voltage source is turned OFF be-
fore connecting variable resistance  to the elec-
trical circuit to avoid electrical shock and to pre-
vent damaging the gauge.
14 VDC + 0.01 VDC
1.
tance and DC voltage source (Fig. 40).
Connect temperature  gauge to  the variable  resis-
+
Figure 40
NOTE:  When reading the  gauge test point, there  are
two white dots on the gauge face below the edge of the
glass cover for each test point. For each variable resist-
ance setting, the needle must  be pointed between the
two white dots.
1
2
2.
Take test point readings (Fig. 41).
IMPORTANT: Allow circuit to warm up for at least 5
minutes before taking test readings.
A.  Set variable resistance to 71 ohms. Apply a 14 +
0.01
VDC to the circuit. The needle should  point to
the middle of the green area (80oC).
B.  Set variable resistance to 38 ohms. The  needle
should  point   between  the  green   and  red   area
(105
oC).
3.
Turn  off  the  voltage  source.  Disconnect  voltage
source, gauge, and variable resistance.
3
Figure 41
1.
2.
Middle position
High temp. position
3.
Edge of glass cover
Electrical System
Page 5 − 26
Groundsmaster 4100−D
Product Specification
CategoriesLawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals
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- 258 pages
Document TypeCatalog
LanguageEnglish
Product BrandToro. Customer Service Representatives are available by phone: Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
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