Temperature Sender (Machine With Kubota Diesel Engine) - Toro Reelmaster 5410 Series Service Manual

Temperature Sender (Machine with Kubota Diesel Engine)

Testing the Temperature Sender
Electrical System: Testing the Electrical Components
g228833
1. Temperature sender
The temperature sender used on machines with a Kubota diesel engine is
attached to the water flange on the engine
Controller (TEC) monitors the operation of the temperature sender.
The resistance of the temperature sender reduces as the engine coolant
temperature increases. The changing resistance of the temperature sender is
used as an analog input to the TEC. The InfoCenter display indicates engine
coolant temperature during machine operation based on CAN communication
with the TEC.
If engine coolant temperature rises to approximately 105°C (221°F), the TEC
input causes the cutting reels to be disengaged and the InfoCenter display
to indicate an operator advisory. If coolant temperature continues to rise to
approximately 115°C (239°F), the engine will be shutdown by the controller and
a fault will be generated to help identify the problem; refer to
(page 7–16).
Note: Excessive engine coolant temperature, a damaged temperature sender or
damaged wiring to the temperature sender could cause the cutting units to be
disengaged or the engine to be shutdown. The InfoCenter display would identify
either an advisory or a fault to help identify the problem.
If excessive coolant temperature causes engine shutdown, the operator can
start the engine to allow the machine to be moved a short distance. After a
start in this condition, the engine will run for approximately 10 seconds before
the engine shuts down again.
1. Park the machine on a level surface, set the parking brake, lower the cutting
units, and shut off the engine. Remove the key from the key switch. Open
hood to get access to engine.
2. Locate temperature sender on engine water flange and disconnect wire
harness connector from sender.
3. Lower coolant level in the engine and remove the temperature sender from
water flange.
Figure 266
2. Water flange
(Figure
Page 7–98
266). The Toro Electronic
Faults Screen
Reelmaster ® 5410/5510/5610 Series
15216SL Rev C