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THE ALCOA STORY: WENATCHEE BUYS WORLD-CLASS VACUUM TRUCK
An important piece of major equipment at Alcoa smelters is the vacuum truck. This truck, used to recover alumina and alumina dust for recycling (as well as carbon dust, aluminum cans and other materials), represents a large capital investment for company operations.
In June 1991, Massena Operations bought such a truck from Ormson Corporation, a manufacturer of industrial vacuum loading products in Hartland, Wisconsin. During that project, Massena’s Matt Coughlin and President John Ormson were concerned with the lack of an all-inclusive specification for the manufacture and purchase of such vehicles. Ormson necessarily purchases the specified chassis, compressor, hoses and accessories and fabricates the hopper installation according to individual plant specifications. “This reinventing the wheel,” says Ormson, “is a waster of valuable expensive resources as each custom built vehicle must be re-engineered.”
As a result, Doug Mahrer, Pittsburgh Procurement Specialist – Electrical, queried the plants and discovered that Wenatchee Works was in the market for a vacuum loader. What followed was a text book case in the proper way to procure a major piece of equipment.
In late September, 1992, representatives from Pittsburgh, Tennessee Operations and Alcoans Rod Stanton and Ken DeWitz from Wenatchee met at Ormson’s plant, along with Bill Gallagher of Alcoa Technical Center. (Stanton and DeWitz also visited a vendor in Alabama.) The purpose of that mini-symposium was to review Alcoa’s overall needs with regard to vacuum loaders and to look at Alcoa specifications covering such commercial mobile vehicles. Of paramount importance was the company’s requirements and specifications in the area of noise control.
From that meeting, Wenatchee drew up specifications for a vacuum truck to meet specific Alcoa standards for chassis, engine, transmission and vacuum pump. Dean Latvaitis and Joe Hazelwood of Tennessee Operations, and Tom Mayes, Warrick Works, contributed to defining these specifications. An exception to normal, generic specifications was Gallagher’s desire to meet Alcoa’s Engineering Standard 30.3.2 “Sound Level Requirements for Purchased, Leased or Rented Vehicles,” and attain a maximum noise level of 85 dBA at three feet from the vehicle’s control panel with the unit operating at full load. That requirement came to be referred to as “Gallagher’s Law.” “Properly,” Gallagher insists, “noise can and should be a pass-fail criterion on any major equipment.”
Ormson proceeded to meet all Wenatchee specifications, building a world-class vacuum truck and achieving the desired noise attenuation levels with carefully selected components, specially designed skirting, equipment mounts and placement, and strategic component enclosures. “In summary,” Ormson later noted, “… significant progress has been made to improve the state of the art associated with industrial vacuum loader sound levels.”
Previous to delivery, Ken DeWitz visited Ormson once more in inspect Wentachee’s new Fast-Vac. He found it A-OK. Stanton, Mechanical Engineer for the project, reports he has “… heard nothing but positive comments from operators. We have for a fact a world-class vehicle, perhaps one of a kind because of the performance and noise attenuation work done on it, and a benchmark which other plants may wish to investigate when making similar purchases. Much of the success can be attributed to specifying a larger-than-required Roots Blower to attain adequate suction at a reduced operating speed.” Additional concerns addressed during the project involved having adequate engine cooling, protection for engine and hydraulics from contaminants, simplification of the controls, providing a durable (Peterbilt) chassis, and a week-long training course for maintenance and operating personnel.
There is a moral to this story: Follow proper procedure when making capital investment in major equipment.
And there are lessons to be learned. This lessons were spelled out by Doug Mahrer and Bill Gallagher. (1) Know up front what you need and want in new equipment. (2) Refer to and follow all pertinent standards and specifications in preparing RforA’s. (3) Call on Alcoans for guidance and counsel who are expert in important areas such as procurement, design, engineering and noise control. (4) Prepare complete and definitive specifications for vendors in all areas so that all vendors are playing on the same field, and that vendors are weeded out who can not or will not meet Alcoa specifications.
Reprinted from the Alcoa “Standardization Digest” – Published by the Alcoa Engineering Standardization Staff – Number Thiry-Two, September 1992
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