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The storage battery (ies), furnished on each chassis shall have sufficient capacity to supply current for adequate operation of the engine starter, lights, signals, heater, and all other electrical equipment whether standard or optional. The batteries for all Type C and D buses shall be group 31 twelve (12) volt batteries as specified by the chassis manufacturer and meet the demands of the system whenever the electrical load exceeds the output capacity of the alternator. See charts below:

Minimum BCI Cold

Minimum Reserve

Cranking AMPS (CCA) at 0

Capacity

degrees (0° F)

600

72 minutes

1200

144 minutes

1200

240 Minutes

Manufacturer Recommended

Manufacturer

Recommended

WITHOUT AIR-CONDITIONING and or WHEELCHAIR LIFT

All Buses Gasoline Type A Buses Diesel Type C & D Buses Diesel All Buses Alternate Fuel

Bus Type

12-VOLT BATTERY (IES)

Minimum BCI Cold

Minimum Reserve

Cranking AMPS (CCA) at 0

Capacity

degrees (0°F)

800

72 minutes

1200

144 minutes

1950

540 minutes

Manufacturer Recommended

Manufacturer

Recommended

WITH AIR-CONDITIONING and or WHEELCHAIR LIFT

All Buses Gasoline Type A Buses Diesel Type C & D Buses Diesel Alternate Fuel

Bus Type

12-VOLT BATTERY (IES)

BRAKE, PARKING

On a school bus with a hydraulic brake, a chassis manufacturer’s standard is acceptable. On air brake models, a dash-mounted control valve to spring-set the parking brake on the rear wheels is required.

BRAKES, SERVICE

Air Brakes and Associated Equipment: Each 59 through 90 passenger chassis shall be equipped with full anti-lock air brakes and parking brake systems as standard equipment (See hydraulic brakes in options section F). Full air brake systems shall meet the requirements of FMVSS No. 121 as applicable to school buses. The following equipment shall be furnished as follows:

A. Air Compressor: Buses equipped with air brakes shall have an air compressor of sufficient capacity to provide adequate air pressure for the air brake system. All air-brake buses shall have a minimum twelve cubic feet (12 cu. ft.) capacity.

Section B-3

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