OPERATING PROCEDURES GRT655/655L OPERATOR MANUAL
4-8 Published 3-23-2020, Control # 654-04
The indicator will come 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 (23, Figure 4-18 and Figure 4-19) will come on in
addition to the Diesel Particulate Filter Clogged Indicator (30,
Figure 4-18 and Figure 4-19) and a severe engine derate will
occur.
These above conditions can only occur if cleaning has been
inhibited or a manual cleaning was interrupted.
Initiating the Manual Exhaust Cleaning Process
To manually clean the exhaust system, do the following:
1. Make sure crane is not parked near flammable objects.
2. Set up a safe area around the crane’s exhaust; remove
tools, rags, grease, or any debris from engine exhaust
area.
3. Set transmission lever to the neutral position.
4. Engage the crane parking brake,
5. Release the service brake and throttle pedals.
6. With engine idling, press the top of the Exhaust System
Cleaning Switch (refer to Exhaust System Cleaning
Switch (Tier 4 Engine Only), page 3-7) to start manual
cleaning.
Within 5 seconds the engine speed will increase to 1000 to
1400 rpm. The engine will continue to run at this speed for up
to 45 minutes.
As a warning, a strobe light (2, Figure 4-3) near the exhaust
pipe (1, Figure 4-3) will flash during exhaust system
cleaning.
Pressing the brake or throttle pedal during cleaning or
pressing the bottom (Inhibit Manual Cleaning) of the Exhaust
System Cleaning Switch will interrupt the manual cleaning
process.
Make sure the crane and surrounding area are monitored
during manual cleaning. If any unsafe condition occurs, shut
off engine immediately.
Engine will return to normal idle speed when the manual
cleaning process is complete.
Inhibiting the Exhaust System Cleaning
To inhibit, or prevent, the exhaust system entering the active
cleaning mode or to stop the exhaust cleaning process that
was manually initiated, press the bottom of the Exhaust
System Cleaning Switch (refer to Exhaust System Cleaning
Switch (Tier 4 Engine Only), page 3-7). The Inhibit Exhaust
System Cleaning Indicator (31, Figure 4-18 and
Figure 4-19), located on the Operator Display Module
(ODM), will come on (amber) and the active and manual
modes of exhaust system cleaning are prevented.
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 0 (OFF)
position.
3. Drain fuel filter-water separator.
WARNING
Burn/Fire Hazard!
During the cleaning process, the exhaust and tailpipe
become very hot. Keep personnel and flammable objects
away from the exhaust. Do not park vehicle near
flammable objects.
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