Grove Published 3-25-2020, Control # 643-04 3-7
GRT880 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
Inhibit Exhaust System Cleaning
The Inhibit Exhaust System Cleaning Indicator (25) is
located in the CCS display Figure 3-14. When the Cleaning
Switch (8) Figure 3-4 is in the exhaust system cleaning
position, this amber indicator is illuminated and active and
manual exhaust system cleaning is prevented.
Diesel Exhaust Fluid (Tier 4 Engines Only)
The Diesel Exhaust Fluid (DEF) Indicator (6) Figure 3-14 is
located in the CCS display. The indicator has four different
stages which will be triggered by the fluid level sensor in the
DEF tank:
Low Tank - First warning reducing agent in the tank is low.
DEF Indicator (6) is lit continuously.
Derate - DEF Indicator (6) starts to flash as a warning that a
derate will be activated if reducing agent in the DEF tank is
not refilled.
Low Level Inducement - DEF Indicator (6) flashes and the
Engine Warning Indicator (17) is lit continuously. Derate is
activated.
Severe Inducement - Once the DEF tank is empty, the crane
operation will be restricted. The DEF Indicator (6) will flash
and the Stop Engine Indicator (16) is solid red.
High Exhaust System Temperature
The High Exhaust System Temperature (HEST) Indicator
(26) Figure 3-14 is located on the CCS Main Screen display.
During exhaust system cleaning it is possible for engine
exhaust to reach temperatures exceeding 650° C (1200° F).
The HEST indicator will illuminate red to warn when
temperatures reach 675° C (1247° F) and will stay on until
temperatures fall below 625° C (1157° F).
A warning light near the tailpipe will flash during exhaust
system cleaning when high exhaust temperatures exist.
For more information on the exhaust system cleaning
process, refer to Exhaust System Cleaning (Tier 4 Engines
Only), page 3-6.
CAUTION
Engine Damage Hazard!
Ultra low sulfur diesel fuel is required in Tier 4 engines.
If “Ultra Low Sulfur” fuel is not used in engines that require
it, the Cummins warranty will be void. Engine
performance will quickly deteriorate and may stop
running.
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