Grove Published 01-29-2015, Control # 512-01 3-1
TMS700E SERVICE MANUAL ELECTRIC SYSTEM
SECTION 3
ELECTRIC SYSTEM
SECTION CONTENTS
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Carrier Relay and Circuit Breaker Panel. . . . . . . . 3-1
Superstructure Relay Panel and Fuse Panel . . . . 3-4
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
General Troubleshooting . . . . . . . . . . . . . . . . . . . 3-8
Troubleshooting Engine Starting Problems . . . . . 3-8
Troubleshooting Engine Charging Problems . . . . 3-9
Troubleshooting Accessories . . . . . . . . . . . . . . . . 3-9
Troubleshooting Swivel-Caused Electrical
Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Connector Troubleshooting . . . . . . . . . . . . . . . . . 3-9
Troubleshooting Lights . . . . . . . . . . . . . . . . . . . . 3-11
Troubleshooting Gauges and Meters . . . . . . . . . 3-11
Troubleshooting Alarms, Indicators, and
Emergency Components . . . . . . . . . . . . . . . . . . . 3-12
Troubleshooting Crane Components and
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Alternator Replacement. . . . . . . . . . . . . . . . . . . . 3-14
Starter Replacement . . . . . . . . . . . . . . . . . . . . . . 3-15
Battery Replacement . . . . . . . . . . . . . . . . . . . . . . 3-16
Relay Panel Component Replacement . . . . . . . . 3-16
Instrument Replacement . . . . . . . . . . . . . . . . . . . 3-17
Switch Replacement . . . . . . . . . . . . . . . . . . . . . . 3-17
Windshield Wiper Assembly Replacement . . . . . 3-18
Windshield Washer Assembly Replacement. . . . 3-19
Skylight Wiper Assembly Replacement. . . . . . . . 3-20
DESCRIPTION
General
The electrical system is 12-volt operation with 12-volt
starting, consisting of an alternator and three lead-acid
batteries. The system is the single wire ground return type,
using the machine’s structure as ground.
Electrical power is transferred to and from the carrier and
superstructure through the electrical swivel. For more
detailed information on the electrical swivel, refer to Swivels,
page 6-13.
Alternator
A 145 ampere alternator is mounted on the engine and is belt
driven. When the engine is running, and the alternator is
turning, the alternator’s 12-volt output terminal supplies the
crane’s electrical circuits. The output terminal also supplies
the voltage to recharge the battery and maintains it at a full
state of charge.
Battery
The batteries are located in a box on the right front side of
the carrier. The batteries are the maintenance free type and
are completely sealed except for a small vent hole in the
side. The vent hole allows what small amount of gases that
are produced in the battery to escape. On some batteries, a
test indicator located on the top of the battery is used to
determine if the battery can be tested in case of a starting
problem.
In addition to the batteries, the battery box also contains a
manual disconnect switch, four 100 amp fuses, one 250 amp
fuse and one 30 amp circuit breaker. The fuses and circuit
breaker protect all electrical circuits except the starter circuit.
Carrier Relay and Circuit Breaker Panel
Most carrier electrical circuits are protected by the
components of the relay and the circuit breaker panel located
to the rear of the side console in the carrier cab. Access is
gained by removing the cover.
The relay and fuse panel contains 18 relays, a flasher, a
buzzer and 24 fuses. A decal in the cover identifies each
fuse and it’s function (Table 3-1 and Figure 3-1).
Fuses
Fuses 2, 3, 9, 10, 11, 12, 13, and 14 are energized when the
battery is connected and the battery disconnect is closed.
Fuses 4, 19, 20, and 21 thru 24 are energized when the
battery is connected and the headlights switch is ON. Fuses
5, 6, 7, 8, and 15 thru 18 are energized when the battery is
connected and the ignition switch is in the ignition RUN (1) or
accessory power position. F18 is a spare, 5 amp fuse.
Reference Only
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