The bus washing equipment as applied for installation by this contractor or manufacturer shall be standard Model B-1025 Bus Wash System, manufactured by the Ross & White Company in Cary, Illinois. The assemblies and components shall be supplied, installed, and integrated into a homogenous system that efficiently performs the intended function, all in consonance with the following requirements as minimum, and those requirements of the general specifications as they pertain to this work.
The bus washer shall wash the roofs, sides and rears of vehicles from 90" to 102" wide. The washer shall be vehically controlled on a drive-through basis by overhead dangle and hip switches. The sides and rears of vehicles shall be detergent brush scrubbed by (2) pivoting brushes. The roofs of vehicles shall be drag mopped by a stationary roof mop. Detergent shall be applied by both a solenoid controlled, siphon operated, prewet detergent arch, mop roof washer and brush sprays. Detergent shall be rinsed by a solenoid operated rinse arch.
A bridge structure shall be designed to secure both side support structures and shall be fabricated from C6x8.2 pound structural channel. Said structure to be cross braced by 2"x2"x.250 structural angle and secured to each column by means of (6) 1/2" diameter Grade 5 hex head cap screws.
Brush Yokes and Pivot Shafts - Brush yokes on which brushes, shafts and drives are mounted shall be designed and supplied in such a manner as to eliminate any possibility of physical contact between the yoke and the bus. The brush yokes shall be fabricated from 4"x3"x.250 structural tubing and shall be of sufficient length to brush scrub the right side and right rear of the vehicle, while the other brush yoke shall be of sufficient length to brush scrub the left side and left rear of the vehicle. The yoke shall be curved so that only the brush itself contacts the vehicle in all washing positions. The brush yoke arms shall be of one piece construction and cold formed with 12" radius bends to allow bus clearance. The yoke arm shall be supported by (3) vertical tubing supports fabricated from 3"x.250 wall structural steel tubing. The yokes shall have a full length pivot shaft fabricated from 4" square x .250 wall structural steel tubing with stub shafts machined from cold rolled steel and insert welded at each end of the pivot tube. The stub shafts shall be machined to the tolerances allowed on pillow block bearings used at pivot points. The yoke arm shall be fitted with (2) sections of 3"x3"x.250 wall steel tubing, trussed with C6x8.2 pound structural channel to accept the clevis of the yoke moving air cylinders.
Hot-Dip Galvanizing - The entire bus wash system shall be hot-dipped galvanized per ASTM A123. Coating 2.3 oz/sq. ft. zinc.
Bearings and Brush Shafts - The pivotal bearings shall be heavy duty, 2-1/4" self-aligning, single row, eccentric locking ball bearings. The brush shaft bearings shall be heavy duty, 1-3/4" self-aligning, single row, eccentric locking ball bearings. To provide a maximum of flex and shock absorption, brush shafts shall be fabricated from 2-1/4" outside diameter by 1-3/4" inside diameter round structural tubing with machined stub shafts insert welded at each end. Brush shafts shall be provided with an anti-wrap disc at the base of the brush to keep brush fibers from entwining bearings, and each bearing shall be equipped with a lubrication fitting.
Air Cylinders - All air cylinders and air controls shall be located in such a manner as to be accessible from ground level for maintenance. Each brush yoke shall be moved by a 4" bore x 15" stroke air cylinder, which shall be trunnion mounted and equipped with adjustable cushions both ends. Maximum working pressure shall be 250 PSIG. The air cylinders shall be provided with an adjustable relief valve at the blank end of the cylinder, and shall be pre-lubricated. The piston rod shall be case hardened and chrome plated, while the cylinder tube shall be of high strength steel with hard chrome plated interior surface. Both hoses to the cylinder shall be 3/8" pipe size, two braid type with a maximum working pressure of 250 PSIG. Each hose shall be equipped with a plated steel male, and a plated swivel steel male 3/8" thread connector. The air cylinders shall be mounted by (2) 1" diameter, single row, ball bearing, flanged trunnion bearings complete with lube fittings. Steel bearing retainers shall be provided to insure secure retention of bearings and cylinder. The cylinder shall attach to the brush yoke by means of female rod clevis attached to a 1-1/4" square steel bronze bushed cylinder link attached to a 4-bolt clevis bracket. Both the rod, clevis and clevis bracket are attached by means of a 3/4" polished retainer type pivot pin with shear capacity of 19,300 pounds. A back-up plate of 1/4" steel shall be fabricated to reinforce the brush yoke cylinder mounting channel. (4) 1/2"x20 thread Grade 5, hex head cap screws shall hold the clevis end of the cylinder to the cylinder mounting channel.
Air Control - Each air cylinder shall have its own air control for adjustment of air. The air controls shall consist of a 3/8" ball valve, combination filter/regulator, lubricator, and air valve, all factory pre-assembled in a sealed fiberglass enclosure. The air control panel shall be mounted to the outrigger of the main column assembly within easy reach of maintenance personnel. All air control components shall be 3/8" pipe size and rated to 150 PSIG maximum working pressure. All air hoses shall be rated to 250 PSIG, and shall be of the two-braid type with swivel fitting one end. Fittings for the air equipment shall be 150 pound galvanized malleable iron.
All Air Controls shall include the following:
Electric Motors and Drives - Each brush shall be driven by a 5 horsepower, totally enclosed fan cooled, NEMA Design "B" electric motor, bolted to a #7MCV right angle gearhead reducer producing a 96 RPM brush speed. The reducer and brush shaft shall be coupled by a bushed flex disc coupling.
Brushes and Hubs - The bus washing system shall be capable of effectively washing the sides and rear of the bus by a minimum of (2) vertically mounted rotary brushes; these brushes to have the following dimensional material and operating characteristics:
Brush Sprays - Each brush shall be supplied with a detergent water brush spray. The brush spray assembly shall be fabricated from 3/4" schedule 40 galvanized pipe with 150 pound malleable galvanized fittings. Brush sprays shall be coupled to solenoid operated siphon lines by means of a 250 PSIG maximum working pressure, 6'-0" long, 3/4" pipe size swivel end water hose. A total of (10) brass spray nozzles shall be inserted in the brush spray pipe by means of 1/8" tapped holes. The nozzles shall spray a total of 15 gallons per minute of detergent water at a spray angle of 120ü. The brush spray assembly shall be mounted directly to the brush yoke.
The rinse arch assembly shall be constructed of 1-1/2" diameter, schedule 40 galvanized pipe with 150 pound galvanized fittings, and shall be supported by (2) 1" diameter, floor anchored "A" braces with (8) 1/2" diameter plated cinch anchors. A total of (22) brass spray nozzles shall provide a flow rate of 110 gallons per minute and a spray angle of 35ü. The nozzles shall be secured to the rinse arch by means of 3/8" tapped holes. NOTE: All flow rates based on 40 PSIG of water pressure. Operation of the rinse arch shall be controlled electrically by means of a 2" water solenoid valve.
Tire guides shall be fabricated from 4" diameter black pipe with welded, smooth ground front flares to insure proper alignment into wash bay. Tire guides shall be anchored every 3'-3" with 3/4" diameter plated cinch anchor bolts to insure a secure tie down to the concrete floor. Tire guides shall run the length of the wash system.
The detergent siphon system shall be fabricated from 150 pound galvanized malleable iron fittings and schedule 40 galvanized pipe. The siphon shall be constructed in (3) tiers; (1) tier for the prewet detergent arch, (1) tier for the mop roof washer, and (1) tier for the machine brush sprays. All (3) tiers shall be solenoid controlled, ball valve regulated, pressure gauge monitored, and siphon operated. The siphon system shall use the Venturi injection principle and shall be adjustable by threaded needle valve. The siphon system shall be factory assembled and bracketed for field installation. All (3) tiers of the siphon system shall be 1-1/4" pipe size with teed 3/4" pipe size siphon lines. Ground joint unions shall be supplied at all solenoid valves and siphon injectors. All ball valves and solenoid valves shall be bronze bodied and rated for 300 PSIG of water pressure. All siphon gauges shall be 2-1/2" diameter face, 0-160 PSIG, plastic bodied, and glycerine filled. NOTE: Liquid detergent supplied by customer.
The control panel shall be housed in a NEMA #12 gasketed, oil-tight enclosure. A through the door mainline, non-fused disconnect manufactured by Westinghouse Electric shall be located for shutdown of electrical functions. The control panel shall be supplied with fuse blocks, motor starters, and a GE Series One Programmable Controller or Texas Instruments Series 305 Controller. A Jefferson machine tool transformer shall provide power reduction to 110 volt control circuit. The control panel wiring shall be color coded and numbered for easy identification. The control panel shall be completely prewired and internal wiring shall be terminated at terminal strips. (3) Door mounted switches shall be supplied for selection of operating mode; Power On and Emergency Off. The mode of operation switch shall be able to select either vehicle sides and rear washing, or sides washing only.
Controls for automatic operation shall consist of vehicle actuated dangle switches; supplemented by machine actuated limit switches. Each switch shall be gasketed and equipped with a cannon plug and receptacle. The switches shall be spring operated with spring loaded silver contracts, and each switch shall be supplied with a vinyl covered fiberglass contact rod. (1) Dangle switch shall be located ahead of the prewet detergent arch, and shall be supported by a galvanized pipe support. (See - A. Prewet Detergent Arch). The switch shall be mounted to a 6" square zinc plated mounting plate, and U-bolted to the pipe support. (2) Machine actuated limit switches shall be located at the top of the rear brush column assembly by means of a 1-1/4" pipe size limit switch bracket. A machine actuated red signal light shall be provided to signal driver at entrance into wash bay.
A washer control station housed in a NEMA #12 enclosure shall be remotely located from the wash system; and shall be capable of start/stop and mode of operation for the wash system.
Drawings - Drawings for the installation, assembly, wiring and piping shall be supplied. Operating and Maintenance Manuals, and repair parts drawings shall be supplied to facilitate maintenance of the machine. (3-Sets complete sets are included in the washer price. Additional sets are available at nominal cost).
Note: Local codes in some areas may require a back-flow prevention device on the water supply line. Supply and installation for such a device shall be the responsibility of party or parties other than the wash equipment manufacturer, unless otherwise specifically noted.
Service Requirements:
- Water - 2-1/2" Supply Line at 40 PSIG Minimum
- Air - 1/2" Supply Line at 80 PSIG Minimum
- Electric - 208/230/460 Volt, 3 Phase, 60 Hertz Current
- Peak Load - 10 HP with 500 Volt AMP Control Circuit
- Drain - 6" Minimum
- Overhead Clearance - 15'-0" at Brush Machine
- 13'-0" at Arches
The wash equipment shall be warranted against defective parts and faulty workmanship for a period of twelve months from the date of start-up. This warranty shall consist of the replacement and installation of defective assemblies or parts without cost to the owner for a period of 90 days. From 91 days to 365 days after start-up, the warranty shall consist of replacement of parts only at no cost to the owner. This warranty shall not cover malfunctions of valves due to foreign objects in the supply lines, malfunctions due to freezing, malfunctions due to maladjustments of controls because of tampering by unauthorized personnel, or malfunctions due to misuse or abuse of the equipment.
