Cover Image

Not for Sale

View/Hide Left Panel
Click for next page ( 18

The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement

Below are the first 10 and last 10 pages of uncorrected machine-read text (when available) of this chapter, followed by the top 30 algorithmically extracted key phrases from the chapter as a whole.
Intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text on the opening pages of each chapter. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

Do not use for reproduction, copying, pasting, or reading; exclusively for search engines.

OCR for page 17
17 Weather Information Include an undercarriage wash and a high-pressure wheel wash during daily service line inspections. Agencies can obtain information on weather by visiting Check air dryers more frequently for moisture content. and (the National Conduct wheelchair lift PMIs more frequently to Oceanic and Atmospheric Administration, or NOAA). Both remove road salt and add lubrication. include useful climatic information, but the NOAA site Check auxiliary engine heaters. charges a fee for some of its information. Information at these Replace wheelchair lift pans with stainless steel ones as sites could be useful when considering other agency practices. part of a mid-life refurbishment program or during new After reviewing the average annual temperature data, it is bus procurements. possible to classify agencies as being in one of three climates Sandblast and recoat the bus chassis as part of a mid-life based on their annual average temperature: program. Cold: 49F or less; Warm weather suggestions: Temperate: between 50F and 59F; or Warm: 60F or more. Conduct an extensive air conditioning PMI in prepara- tion for summer. Examples for each type of operating climate and their aver- Clean out radiators monthly with a suitable solvent, and age annual temperatures are shown in Table 2-2. Agencies flush with water to prevent overheating. are reminded that the averages for the cities listed below do Tighten hose clamps during each PMI, and use clamps not show the differences between extreme low and extreme that apply a constant torque. high temperatures that must be considered when comparing Check air system integrity. your agency's climate with another. Information regarding Use special bearing lubricants. temperature extremes is available at the weather websites listed above. Miscellaneous seasonal suggestions: Blow out radiators with air pressure to remove tree Weather-Related Maintenance Suggestions leaves in autumn months. Blow out radiators with air pressure to remove build up Suggestions for specific weather-related maintenance of seeds and leaves from trees. practices include the following. Add a wire mesh screen over the radiator door to catch leaves. Clean the wire mesh screen often to prevent Cold weather suggestions: clogging of the radiator. Flush brakes with clean fresh water after significant rain to When road salt is used, steam clean the bus undercar- remove abrasive debris carried into the brakes by the rain. riage before each PMI. A new magnesium chloride de-icing salt solution is causing premature corrosion of transmission filters, PART 5: DEVELOPING TIME STANDARDS electrical components, and other exposed bus compo- nents. Traces of this de-icing mixture are also being The use of standard repair times (SRTs) is a natural reported on new buses driven through regions that use complement to maintenance practices in that one defines the these chemicals. Rinse bus undercarriages thoroughly, procedures, while the other defines the average time needed and carefully inspect radiators, charged air coolers, to carry out the procedures. Assigning a time to jobs allows electrical connections, brake drums, and fasteners. managers to better plan for maintenance staffing levels, TABLE 2-2 Average climate classifications (in F) Cold Temperate Warm Albany, NY = 47.3 Boston, MA = 51.3 Atlanta, GA = 61.2 Buffalo, NY = 47.7 New York, NY = 54.1 Dallas, TX = 66.2 Chicago, IL = 48.9 Philadelphia, PA = 54.1 Houston, TX = 68.7 Cleveland, OH = 49.5 Pittsburgh, PA = 52.0 Las Vegas, NV = 67.1 Detroit, MI = 48.6 San Francisco, CA = 57.0 Los Angeles, CA = 63.0 Minneapolis, MN = 44.8 Seattle, WA = 52.0 Miami, FL = 75.7 New Orleans, LA = 68.0