Specifications

December 2013
REQUEST FOR PROPOSALS FOR
PURCHASE AND DELIVERY OF HEAVY-DUTY BUSES
RFP SRTA-2014-01
TECHNICAL SPECIFICATIONS
PAGE-17
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c. The exhaust system will meet all clean air standards, USEPA in effect for the
model year bus offered.
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d. Exhaust system shall be constructed so that it will not cause back pressure in the
engine or damage to the paint on the coach, and shall be anchored as near the
end of the exhaust line as possible. It shall be mounted so as to maintain the
integrity of its design throughout the life of the coach.
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e. Exhaust manifolds, muffler and single tail pipe assemblies shall be tight and
allow no emission of fumes or smoke other than from open end of tail pipe.
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f. Access to test port on muffler shall be provided.
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g. Exhaust tail pipes shall be constructed of stainless steel tubing. The use of the
vertical exhaust outlet shall not increase the overall length of the vehicle, nor
shall it be located in such a way as to present a burn hazard to the pedestrian
traffic. The termination of the tail pipe shall be such that it complies with FMVSS
108 pertaining to side marker and clearance lights, and exhaust shall be
deflected to the left rear of the coach.
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11.10 Transmission
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a. Automatic transmission shall be a Voith four-speed, or approved equal,
compatible with the engine offered. An access panel through the bus floor to
access the top of the transmission shall be provided. The access cover shall
be covered with RCA flooring material, or approved equal, and trimmed with
stainless steel. Fasteners shall be heavy-duty stainless steel with captive mating
fasteners located in the steel floor structure.
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b. The transmissions shall be equipped with a hydraulic converter start, a hydraulic
type retarder, and the latest electronic controls. A low profile cast aluminum pan
shall be provided for maximum clearance. The retarder calibration shall be
confirmed during the pre-manufacturing meeting.
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c. Transmission shall have a built-in oil pump, governor, and an external heat
exchanger that utilizes water from the engine cooling system. The heat
exchanger shall be located in an accident-free area.
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d. The installation design shall allow for separate removal of the transmission
without removal of the engine. Engine supports and mounts shall not be located
on the transmission to allow for easy transmission removal.
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d. A drain plug of magnetic type, and a flat magnet attached to bottom of oil pan
near drain opening, shall be furnished.
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e. Transmission shall have a spin-on type external oil filter on both the main
pressure valve body input line and the oil cooler output or return line.
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f. The retarder to have an On-Off switch mounted in overhead electrical
compartment.
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11.11 Transmission Controls
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a. The transmission shall be governed by electronic controls, which contain a
programmable read-only memory (PROM) that will provide basic transmission