Standard Bus Procurement Guidelines - APTAStandards.com
Standard Bus Procurement Guidelines - APTAStandards.com
Standard Bus Procurement Guidelines - APTAStandards.com
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<strong>Standard</strong> <strong>Bus</strong> <strong>Procurement</strong> <strong>Guidelines</strong><br />
sensor shall activate the malfunction indicator. Malfunction and other indicators listed in the<br />
following table shall be supplied on all buses.<br />
Space shall be provided on the panel for future additions of no less than (5 or number specified by<br />
procuring agency) indicators as the capability of on-board diagnostic systems improves.<br />
Visual Indicator Audible Alarm Condition or Malfunction<br />
A/C Stop None Compressor stopped due to high/low pressure<br />
or loss of refrigerant<br />
Check Engine None Engine Electronic Control Unit detects a<br />
malfunction<br />
Check Transmission None Transmission Electronic Control Unit detects<br />
a malfunction<br />
Fire Bell Over-temperature condition in engine<br />
<strong>com</strong>partment<br />
Generator Stop None Loss of generator output<br />
Hot Engine Buzzer Excessive engine coolant temperature<br />
Low Air Buzzer Insufficient air pressure in either primary or<br />
secondary reservoirs<br />
Low Oil Buzzer Insufficient engine oil pressure<br />
Low Coolant Buzzer Insufficient engine coolant level<br />
Wheelchair Lift Beeper Wheelchair lift is not stowed and disabled<br />
5.4.6.2 WINDSHIELD WIPERS<br />
The bus shall be equipped with a variable speed windshield wiper for each half of the windshield,<br />
with separate controls for each side. If powered by <strong>com</strong>pressed air, exhaust from the wiper motors<br />
shall be muffled or piped under the floor of the bus. No part of the windshield wiper mechanism<br />
shall be damaged by manual manipulation of the arms. At 60 mph, no more than 10 percent of the<br />
wiped area shall be lost due to windshield wiper lift. Both wipers shall park along the edges of the<br />
windshield glass. Windshield wiper motors and mechanisms shall be easily accessible for repairs or<br />
service from inside or outside the bus and shall be removable as <strong>com</strong>plete units. The fastener that<br />
secures the wiper arm to the drive mechanism shall be corrosion resistant.<br />
5.4.6.3 WINDSHIELD WASHERS<br />
The windshield washer system shall deposit washing fluid on the windshield and, when used with the<br />
wipers, shall evenly and <strong>com</strong>pletely wet the entire wiped area. If powered by <strong>com</strong>pressed air, all<br />
fluid shall be purged from the lines after each use of the washers.<br />
The windshield washer system shall have a minimum 3-gallon reservoir, located for easy refilling and<br />
protected from freezing. Reservoir pumps, lines, and fittings shall be corrosion-resistant, and the<br />
reservoir itself shall be translucent for easy determination of fluid level.<br />
Technical Specifications 176 10/18/07
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