The trailer washing equipment as applied for installation by this contractor or manufacturer, shall be standard Model TW-1300 manufactured by the Ross & White Company - Cary, Illinois. The assemblies and components shall be supplied, installed and integrated into a homogenous system that efficiently performs the intended functions all in consonance with the following requirements as minimum and those requirements of the general specifications as they pertain to this work.
The trailer washer shall wash the roofs and sides of trailers from 84" to 102" wide. The washer shall be controlled on a drive-through basis by vehicle actuated switches. The sides of trailers shall be detergent brush scrubbed by (2) air operated pivoting brushes. The roofs of trailers shall be drag mopped by a stationary roof mop. Detergent shall be applied by both solenoid control, siphon operated, prewet detergent arch 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"x1/4" structural angle and secured to each column by means of (6) 1/2" diameter Grade 5 hex head cap screws.
Brush Yoke and Pivot Shafts
The 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 trailer. The brush yokes shall be fabricated from 4"x3"x1/4" structural tubing and shall be of sufficient length to brush scrub one side of the vehicle, while the other brush yoke shall be of sufficient length to brush scrub the other side of the vehicle. The yoke arms shall be supported by (1) vertical tubing support fabricated from 3" square x 1/4" wall structural steel tubing. The yoke shall have a full length pivot shaft fabricated from 4" square by 1/4" 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"x1/4" wall steel tubing; trussed with C5x6.7 pound structural channel to accept the clevis of the yoke moving air cylinders.
Bearings and Brush Shafts
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, eccentric locking, single row, ball bearings. To provide a maximum of flex and shock absorption, the brush shafts shall be fabricated from 2-1/4" outside diameter by 1-3/4" inside diameter round structural tubing with machine 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 3-1/4" bore x 6" stroke air cylinder which shall be rear trunnion mounted. A maximum working pressure shall be 250 PSIG. The air cylinder shall be provided with an adjustable relief valve at the blank end of the cylinders, and shall be pre-lubricated. 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 a 3/4" female rod end bearing attached to a 4-bolt clevis bracket. The rod end bearing and clevis bracket are attached by means of a 3/4" polished retainer type pivot pin with a 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 Controls
Each air cylinder shall have its own air control for adjustment of air. The air control shall consist of a 3/8" ball valve, combination filter, regulator, lubricator and air valve, all factory pre-assembled and mounted inside a NEMA #12 fiberglass enclosure. Both filter and lubricator sight bowls shall protrude through the bottom of the air control enclosure for maintenance inspection. The air control panel shall be mounted to the main column assembly within easy reach of maintenance personnel. All air control components shall be 3/8" pipe size, 200 PSIG working pressure. All air hoses shall be rated to a 500 PSIG minimum burst and shall be of a two braid type with swivel fitting one end. Fittings for air equipment shall be 150 pound galvanized malleable iron. All air controls shall include the following:
- a. 3/8" Ball valve, bronze bodied, rated for 300 PSIG installed ahead of air equipment.
- b. Combination Filter/Regulator: Fully adjustable with locking set, 0-160 PSIG liquid filled gauge monitored, removable visual polycarbonate sight bowl, push-n-drain water blow off.
- c. Lubricator: Fully adjustable, needle valve operated, produce oil particles of 2 microns or smaller, removable visual polycarbonate sight bowl, 360ü visual sight dome, pet cock type oil drain.
- d. Air Control Valve: 4-Way, inline mounted, 2-position, 5-ported, single solenoid pilot operator maintained contact, air and spring return, recessed non-locking manual override, capable of being serviced without disturbing piping or wiring.
- e. Air Speed Control: Inline mounted, two per cylinder, fully adjustable with locking nut, screen baffled mufflers.
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 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 trailer washing system shall be capable of effectively washing the sides of the trailer by two vertically mounted rotary brushes; these brushes to have the following dimensional material and operating characteristics:
- 1. Right side wash shall be accomplished by (1) brush having a diameter of 44". Brush material to be extruded flagged Circuleen of approximately .044 gauge, 20 strips to the core.
- 2. Left side wash shall be accomplished by (1) brush, having a diameter of 44". Brush material to be extruded flagged Circuleen of approximately .044 gauge, 20 strips to the core.
- 3. Synthetic filament brush strips shall be gripped firmly in disposable aluminum cores, the latter to be attached to 2-1/4" shock resisting tubular brush shafts, by means of bolting collars. Both brushes shall have a 10'-0" height.
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.
All fabricated sections of washer frame, brush yokes and arms, roof mop frame, spray arch frames and miscellaneous structure shall be hot-dipped galvanized after fabrication per ASTM A123 or A385. Metallic surfaces not suitable for galvanizing shall be coated with 95% zinc primer and covered with durable machine enamel. All erection bolts shall be plated Grade 5.
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. (Three 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.
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.
