OPERATING PROCEDURES GRT8120 OPERATOR MANUAL
4-10 Published 3-22-2021, Control # 702-02
The indicator comes on (constant) during the early stages of
required cleaning. If this condition continues, the indicator
will begin to flash and a slight engine derate will occur.
If the exhaust system continues to clog, the Engine Warning
Indicator in the Alerts Area comes on in addition to the
Exhaust Cleaning Required Indicator and a severe engine
derate will occur.
These above conditions can only occur if cleaning has been
inhibited or a manual cleaning was interrupted.
When the Engine Exhaust Cleaning Required Indicator is on
constant or flashing, start the manual cleaning process at the
next opportune time. Refer to section titled Exhaust System
Cleaning (If Equipped), page 4-153 for procedures to
manually clean the exhaust.
As a warning, the High Exhaust System Temperature
(HEST) strobe light (1, Figure 4-1) near the exhaust pipe (2,
Figure 4-1) will flash during exhaust system cleaning.
Shutdown Procedure
1. Allow engine to run at fast idle speed for about five
minutes to avoid high internal heat rise and allow for
heat dissipation.
2. Turn ignition switch counter-clockwise to the 0 (OFF)
position.
3. Drain fuel filter-water separator.
4. If crane is to be inactive for more than 24 hours,
disconnect the batteries using the battery disconnect
switch
To avoid possible engine fault codes and undesirable
operation, make sure the keyswitch has been off for 2
minutes before disconnecting the batteries.
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