Request for Proposal [insert date]
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- Non-Drive Axle
- Brakes
- Actuation
- Friction Material
- Hubs and Drums
Drive AxleThe bus shall be driven by a heavy-duty axle with a load rating sufficient for the bus loaded to GVWR. The drive axle shall have a design life to operate for not less than 300,000 miles on the design operating profile without replacement or major repairs. The lubricant drain plug shall be magnetic type. If a planetary gear design is employed, the oil level in the planetary gears shall be easily checked through the plug or sight gauge. The axle and driveshaft components shall be rated for both propulsion and retardation modes with respect to duty cycle. NOTE: The retardation duty cycle can be more aggressive than propulsion. The drive shaft shall be guarded to prevent hitting any critical systems, including brake lines, coach floor or the ground, in the event of a tube or universal joint failure. Non-Drive AxleThe non-drive axle is the drive axle without the drive gear with a load rating sufficient for the load to GVWR. Turning Radius
BrakesService BrakeDefault Brakes shall be self-adjusting. Brake wear indicators (visible brake sensors) shall be provided on exposed push rods. Alternative Visible stroke indicators may be combined with electronic brake monitoring system and vehicle brake warning system to notify driver and maintenance of unsafe brake conditions. ActuationDefault Air-Actuated Brakes Service brakes shall be controlled and actuated by a compressed air system. Force to activate the brake pedal control shall be an essentially linear function of the bus deceleration rate and shall not exceed 70 lbs at a point 7 in. above the heel point of the pedal to achieve maximum braking. The heel point is the location of the driver’s heel when his or her foot is rested flat on the pedal and the heel is touching the floor or heel pad of the pedal. The ECU for the ABS system shall be protected, yet in an accessible location to allow for ease of service. The total braking effort shall be distributed between all wheels in such a ratio as to ensure equal friction material wear rate at all wheel locations. Manufacturer shall demonstrate compliance by providing a copy of a thermo dynamic brake balance test upon request. Alternative Air or hydraulic brakes. Default No automatic traction control. Alternative Automatic Traction Control Microprocessor controlled automatic traction control (ATC) shall be provided.
Alternative Remote brake wear indicator.
Default
Drum Brakes The bus shall be equipped with brake drums. Brake drums shall allow machining for oversized linings per manufacturers specifications. Alternative Disc Brakes on Front Axle The bus shall be equipped with brake drums on the rear axle and disc brakes on the front axle. The brake drums shall allow machining for oversize linings per manufacturer’s specifications, and brake discs shall allow machining of each side of the disc to obtain smooth surfaces per manufacturer’s specifications.
Disc Brakes on All Axles The bus shall be equipped with disc brakes on all axles, and the brake discs shall allow machining of each side of the disc to obtain smooth surfaces per manufacturer’s specifications. The brake system material and design shall be selected to absorb and dissipate heat quickly so that the heat generated during braking operation does not glaze brake linings. Directory: resources resources -> General text for tender (recommendations) for Pilkington Profilit™ Contents Page resources -> North Carolina Inclusion Initiative Mapping Where Children with ieps are Being Served Purpose resources -> Practice learning resources -> The Rise of Video Games Section “Word” Matt Spencer resources -> Request for proposal contract form for the transit industry resources -> The University of York 13th 16th April 2004 resources -> Biological and Biomedical Sciences Program Community Education Initiative resources -> Region III standing regional response team (rrt) meeting williamsburg, Virginia Thursday, January 12, 2012 resources -> Efca eastern District and TouchGlobal, the crisis response ministry of efca resources -> World Map 4 (1)-Global Warming Download 1.62 Mb. Share with your friends:
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