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. 46).
Connect temperature gauge to the variable resis-
+
--
Figure 46
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. 47).
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 47
1.
2.
Middle position
High temp. position
3.
Edge of glass cover
Electrical System
Page 5 -- 30
Groundsmaster 4100--D
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
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| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
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