LeeBoy 8520C - DEF Temperature Management; DEF Temperature Alerts and Required Actions

4-10 LeeBoy 8520C Conveyor Paver
Operation
icon ashes yellow. Engine torque will be reduced 50
percent and engine speed will be reduced 40 percent
after 45 minutes.
If the operator continues to ignore the warning and
the DEF tank is still not relled after an additional 45
minutes, the warning icon will illuminate red and ash
continuously. At this point, there will be no available
torque--the engine will only idle.
In either of these conditions, relling the DEF tank will
restore engine performance.
If the DEF tank level has fallen to 0 percent, a STOP
warning symbol will also illuminate and ash red. At
this level, there is no ability for DEF injection (or DPF
regeneration described later) into the exhaust system,
therefore no ability to cool the DEF injector as needed.
The DEF injector may now be damaged by heat and
require replacement from your authorized dealer.
DEF TemperatureDEF Temperature
If the DEF becomes too hot, the engine warning light
will illuminate in the top screen banner, a diagnostic
message will pop up on the screen, and the soft key
banner will change.
If the uid temperature reaches 120° F, a diagnostic
message appears, instructing the operator to fill the
DEF tank to lower the temperature. (Figure 4-13)
Figure 4-13. DEF Temperature >120° Alert Message
If the uid temperature reaches 140° F, the diagnostic
message warns the operator that DEF sensor damage
may occur at this temperature level. (Figure 4-14)
To prevent sensor and possibly engine
damage, shut down the engine to allow the DEF to
cool, then ll up the DEF tank if needed.
Figure 4-14. DEF Temperature >140° Alert Message