Toro 08161SL Service Manual Model 30412 Groundsmaster 4000 D Preface Publication

Temperature Gauge
The  temperature gauge  can  be tested  using a  new
gauge as  a substitute or  by the use  of a DC  voltage
source and a variable resistance box.
CAUTION
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.
VARIABLE
RESISTANCE
14
VDC + 0.01 VDC
1.
Connect temperature  gauge to  the variable resis-
tance and DC voltage source (Fig. 44).
+
--
NOTE:  When reading the gauge test  point, there are
two white dots on the gauge face below the edge of the
glass cover for the each test point. For each variable re-
sistance setting, the needle  must be pointed between
the two white dots.
Figure 44
1
2.
Take test point readings (Fig. 45).
2
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.
source, gauge and variable resistance.
Turn  off  the  voltage source.  Disconnect  voltage
3
Figure 45
1.
2.
Middle position
High temp position
3.
Edge of glass cover
Electrical System
Page 5 -- 28
Groundsmaster 4000--D
Product Specification
CategoriesLawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals
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- 298 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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