Torque available from air motors of pneumatic
systems is capable of accelerating the engine to
twice the engine cranking speed in about half the
time required by electric starters. The starting
system should be the manufacturer's standard
equipment.
The starting system, regardless of type, should
have a start-stop switch providing functions
including testing, reset, manual run/start manual
stop, an adjustable cranking cycle and cool down
mode of operation.
If an electric system is provided, an adjustable
cranking limit device should be specified to limit
the engine cranking to a specified time limit.
**************************************************************************
Each diesel engine shall be provided with a starting system. The system
shall be [pneumatic] [electric] and of sufficient capacity to start the
engine at the minimum temperature specified. The system shall have a
start-stop switch which provides functions including testing, reset, manual
run/start, manual stop, and adjustable cranking and cooling down operation.
The starting system shall be the manufacturer's standard equipment.
2.11.1
Electrical Starting System
**************************************************************************
NOTE: Delete this paragraph and subparagraphs in
their entirety if a pneumatic starting system is
specified.
**************************************************************************
An electrical starting system shall be provided to operate on a [24]
[____]-V DC utilizing a negative circuit ground. An adjustable cranking
device should be included to limit the engine cranking to a specified time
limit. Starting motors shall be in accordance with SAE ARP892.
2.11.1.1
Battery
**************************************************************************
NOTE: Select a nickel-cadmium type battery only
when the battery temperature cannot be maintained
above -6 degrees C (22 degrees F).
**************************************************************************
A starting battery system shall be provided and include the battery,
battery rack, intercell connectors, spacers, automatic battery charger with
overcurrent protection, metering, and relaying. The battery shall be in
accordance with SAE J537. Critical system components (rack, protection,
etc.) shall be designed to withstand the seismic acceleration forces
specified in subparagraph VIBRATION ISOLATION AND SEISMIC RESTRAINTS under
paragraph SPECIAL LIMITATIONS. The battery shall be a [lead-acid]
[nickel-cadmium] type, with sufficient capacity, at the minimum [outdoor]
[indoor] temperature specified, to provide a minimum cranking cycle
consisting of three cranking periods of up to 8 sec per period with 8-sec
intervals between crank periods.
SECTION 15133A
Page 31
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