Electrical System - Perkins 402D-05 Operation And Maintenance Manual

12 SEBU8311-02
Safety Section

Electrical System

On the initial start-up of a new engine or an engine
that has been serviced, make provisions to stop the
engine if an overspeed condition occurs. This may be
accomplished by shutting off the fuel supply and/or
the air supply to the engine.
If equipped, in order to stop an electronically
controlled engine, cut the power to the engine.
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Electrical System
Never disconnect any charging unit circuit or battery
circuit cable from the battery when the charging unit
is operating. A spark can cause the combustible
gases that are produced by some batteries to ignite.
To help prevent sparks from igniting combustible
gases that are produced by some batteries, the
negative "−" jump start cable should be connected
last from the external power source to the negative
"−" terminal of the starting motor. If the starting motor
is not equipped with a negative "−" terminal, connect
the jump start cable to the engine block.
Check the electrical wires daily for wires that are
loose or frayed. Tighten all loose electrical wires
before the engine is started. Repair all frayed
electrical wires before the engine is started. See
the Operation and Maintenance Manual for specific
starting instructions.
Grounding Practices
Correct grounding for the engine electrical system
is necessary for optimum engine performance
and reliability. Incorrect grounding will result in
uncontrolled electrical circuit paths and in unreliable
electrical circuit paths.
Uncontrolled electrical circuit paths can result in
damage to main bearings, to crankshaft bearing
journal surfaces, and to aluminum components.
Engines that are installed without engine-to-frame
ground straps can be damaged by electrical
discharge.
To ensure that the engine and the engine electrical
systems function correctly, an engine-to-frame
ground strap with a direct path to the battery must be
used. This path may be provided by way of a direct
engine ground to the frame.
All grounds should be tight and free of corrosion. The
engine alternator must be grounded to the negative
"-" battery terminal with a wire that is adequate to
handle the full charging current of the alternator.
This document is printed from SPI². Not for RESALE