JCB EcoMAX Engine Installation Manual
Page 32 of 64 320/A9164-1 © JCB Power Systems Ltd.
12. Electrical System
12.1 Overview
W WARNING!
Battery electrolyte is toxic and corrosive. Do not breathe the gases given off by the battery.
Keep the electrolyte away from your clothes, skin, mouth and eyes. Wear safety glasses.
W WARNING!
Batteries give off explosive gases. Keep flames and sparks away from the battery. Do not smoke
close to the battery. Make sure there is good ventilation in closed areas where batteries are
being used or charged. Do not check the battery charge by shorting the terminals with metal,
use a hydrometer or voltmeter.
W WARNING!
Understand the electrical circuit before connecting or disconnecting an electrical component. A
wrong connection can cause injury and damage.
W WARNING!
Injury may occur when lifting batteries. Do not lift heavy objects on your own. Use lifting
equipment or the help of an assistant.
The basic electrical system consists of the following:
Battery or batteries (24 V systems)
Starter motor
Alternator
Key-switch
Various sensor and relay devices.
Always use proprietary parts that are properly matched to the requirements of the engine
and which have been proven to be durable in the application being considered. Make sure
that the earth paths are short as this gives reliable operation and avoids EMC problems.
Additional devices for operation in low temperatures, such as below -12°C ambient may be
required. A 1000 W block heater is available in both 110 V and 240 V variants. Block heaters
will be most efficient in terms of engine core temperature when left on overnight. However,
they show a significant benefit after four hours of operation. The offered block heater is not
thermostatically controlled and does not suit continuous operation.
12.2 Performance
The OEM must test/check the electrical system to make sure it conforms with the
performance requirements for voltage overload, EMC emissions (where applicable), cranking
speeds, alternator loads, earthing, cold start strategy and warning device functionality.
12.3 Voltage Capability
All system components must be capable of withstanding a 50% voltage overload. This
means that for a 12 V system, all components must be capable of safe operation at voltages
up to 18 V. For a 24 V system the limit is 36 V. (See JCB standard 00140, section 12).
A minimum of 6.5 V must be seen at the ECU to avoid ECU brown out.
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