Manitowoc Grove GRT880, Operator'S Manual

Page: 127 / 202

Grove
Published 3-25-2020, Control # 643-04
3-63
GRT880 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
3
• From 95°C to 10°C (200°F to 50°F): Crane operation
with a load is allowed with no restrictions.
Above 95°C (200°F): No crane operation is allowed. Let
hydraulic oil cool by running engine at idle with no functions
actuated.
Engine Operation
Start-up and shutdown procedures for most diesel engines
are generally the same. Therefore, the following procedures
can be applied, except where specific differences are noted.
(Refer to applicable engine manufacturer’s manual for
detailed procedures).
Jump Starting Hazard
Do not attempt to jump start the crane.
All crane models, particularly those produced since 2000,
have multiple computer systems (crane control, RCL, engine
and transmission control) that are highly susceptible to
voltage/amperage surges in the electrical system.
The batteries should be completely disconnected from the
crane electrical system and charged using a battery charger
of appropriate voltage level or replace the batteries with fully
charged batteries. Refer to
Charging the Battery , page 3-63.
Charging the Battery
When charging the batteries, do not turn on the battery
charger until the charging leads have been connected to the
battery(s). Also, if the battery(s) are found to be frozen, do
not attempt to charge them. Remove the battery(s) from the
crane, allow them to thaw, and then charge the battery(s) to
full capacity.
“Slow charging” is preferred to “fast charging”. Fast charging
saves time but risks overheating the battery(s). Slow
charging at six (6) amps or less develops less heat inside the
battery and breaks up the sulfate on the battery plates more
efficiently to bring the battery up to full charge. The use of a
“smart charger” that automatically adjusts the charging
amperage rate should be used.
Start-Up Procedure
Make an under-the-hood inspection for fuel, oil, and coolant
leaks, worn drive belts, and trash build-up.
Use correct grade of oil for prevailing temperature in the
crankcase to prevent hard cranking. Diesel fuel should have
a pour point of 6°C (10°F) less than the lowest expected
temperature. In case of an emergency, white kerosene can
be added to the fuel to bring the pour point down to the
required temperature. This will prevent clogging of filters and
small passages by wax crystals. The addition of kerosene is
NOT recommended for general use.
Ensure Battery Disconnect Switch handle (1) (Figure 3-26) is
in the ON position (handle shown in the OFF position)
CAUTION
It is strongly recommended that the batteries not be
“jumped” with a different vehicle, portable power pack,
etc. The surge of power from these sources can
irreparably damage the various electronic controls and
computer systems. Jump starting the crane batteries
with a different vehicle while the engine is running can
damage the donor vehicle electronics as well if done
improperly.
DANGER
Diesel engine exhaust can be harmful to your health. Only
operate engine in a well ventilated area or vent exhaust
outside.
CAUTION
Never crank engine for more than 30 seconds during an
attempted start. If engine does not start after 30 seconds,
allow starter motor to cool for two minutes before
attempting another start.
CAUTION
If engine does not start after four attempts, correct
malfunction before attempting another start.
FIGURE 3-26
8623
1