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ELECTRICAL SYSTEM
GRT9165 SERVICE MANUAL
3-2
Published 10-01-2020 Control # 699-00
Batteries and Battery Disconnect Switch
Batteries are located in a compartment on the left side of the
crane. Batteries are the maintenance free type and
completely sealed except for a small vent hole in the side.
The vent hole allows a small amount of gases produced in
the battery to escape.
A Battery Disconnect Switch (1, Figure 3-2) is located above
the battery compartment. To disconnect batteries, turn
Battery Disconnect Switch OFF. Turn switch ON to connect
the batteries.
Jump Starting Hazard
Do not attempt to jump start the crane.
This crane has 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 Batteries
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.
Cab Electrical Panels
NOTE:
Refer to the electrical schematic in the back of this
manual for a diagram of the electrical system.
The cab electrical panels (Figure 3-3 and Figure 3-4) are
located inside the crane cab, behind the operator’s seat and
the right side panel. They feature cab and superstructure
relay and fuse boxes, wiring harness connector bulkhead,
and RCL module.
NOTE:
Cab control modules and RCL module are not
serviceable. Contact Crane Care Customer
Service with module service or repair questions.
FIGURE 3-1
10145
1
2
FIGURE 3-2
1
10146
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.
Summary of Contents for Grove GRT9165
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