Perkins 1206E-E70TTA Operation And Maintenance Manual page 19

SEBU8601-04
Grounding Practices
Illustration 15
Typical example
(1) Ground to battery
(2) Ground to starting motor
(3) Starting motor to engine block
Illustration 16
Typical example
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(5) Ground to the battery
(6) Ground to the engine block
(7) Primary position for grounding
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 the 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.
The connections for the grounds should be tight and
free of corrosion. The engine alternator must be
grounded to the negative "-" battery terminal. The
wire used must be adequate to handle the full
charging current of the alternator.
19
Safety Section
Electrical System
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