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September 1979 - Page 4


M-K'S NEW TESO-4S UNIT
this M-K shortline in Illinois). generation of innovative locomotives

S67BC prime mover (the test unit was freshly

rebuilt Wabash Valley 4103. now at work for The fuel-efficient M-K TESO-4S (Tractive Effort SO,OOO pounds, four driving axles, Sulzer engine) was created as the second in a new that combine engine and carbody design features for convenience of operation and maintenance as well as reducing downtime. The SOOI is fitted with a Sulzer Brothers 6ASL 2S/30 prime mover. a six-cylinder. four-stroke cycle engine that has fewer moving parts than conventional sixteen-cylinder locomotive diesel engines, meaning less wear and reduced maintenance. Many of the parts, such as the pistons, rods. bearings, cylinder heads, valves and guides, are interchangeable between the six-cylinder engine in the TESO-4S and the twelve-cylinder delivered to Southern Pacific. This vee-type twelve, or a similar sixteen-cylinder engine derated to 3600
Norman E. Anderson

horsepower, is soon to be installed in a series of rebuilt Union Pacific and Santa Fe S04S's. The former will do most of the rebuilding itself. with M-K fitting the new Sulzer engines. The TESO-4S is intended for yard service or branch line assignments. Builder M-K now stands ready to remanufacture an existing

I n February of 1978, the Morrison-Knudsen Company's Railroad Division brought the Sulzer twelve-cylinder ASV 2S/30 diesel engine to the United States locomotive market with the introduction of four prototype TE70-4S units delivered to Southern Pacific

B rand-new

TESO-4S n umber 5001, M-K

serial 005, at Boise July 6 in the new paint scheme of M-K R ailroad Equipment Leasing. the former Union Pacific GP9 278. originally constructed in September, 1954 by EMO as serial number 1987S. Most of the equipment on the new locomotive was reused from the UP GP9 unit, with the exception of the tw048-inch, 9-blade AC cooling fans and. of course, the prime mover. After initial testing near Boise on Union Pacific. the SOOI was sent east for a six month period of testing in service on Conrail. One of builder Morrison-Knudscn's primary objectives with this introduction of the new Sulzer-engined TESO-4S is to capture a larger share of the rebuilding market based on the fuel efficiency of the AS 2S/30 engine which. in tests at Boise, was shown to be ten per cent less than a comparable horsepower GP7 from which secured its ISOO an EM0 sixteen-cylinder

NEWS. February. 1978). Numbers 7030-7033,

(PACIFIC

locomotive to the new fuel-saving specifications. or to build a new one at Boise. Another option that is available is a conversion "kit" which would allow any railroad, with sufficient shop capabilities. to do the work themselves. Morrison-Knudsen is the exclusive sales agent for North American railroad applications of the Sulzer engine and the firm hopes for increased interest in the Swiss engine in the mont hs ahead. According to M-K's own figures. the TESO-4S could save a railroad owner over $40,000 a year in the cost of operating a remanufactured G 1'9. based on a minimum of 80,000 miles a year and 7S-a-gallon fuel. This is a savings certainly well worth considering as fuel costs rise even morc in the future .

these four units continue in service. primarily out of Eugene. Oregon. and are widely known for their special Daylight-colored test paint scheme which SP advises will not be duplicated. at least in the same styling. Seventeen mont hs later. M-K's Boise. Idaho facility has now introduced another prototype locomotive with a prime mover from Sulzer Brothers of Winterthur. Switzerland. This time it is a six-cylinder turbocharged version of the 25.30 AS Sulzer diesel engine. rated at 1500 horsepower for traction at 900 rpm. Numbered and lettered for M-K Railroad Equipment Leasing Company 5001. the unit was built from

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Revised diti.on. Now Avo.i.lo.ble

RAILROADING VVEST
.A. Contern.porary Glirn.pse
The talents of lensmen Jeffrey T. Brouws and Ronald C. Hill com bine to bring you this fascinating photo essay. The introduction by Howard Fogg, the distinguished rail artist, sets off all the drama, excitement and unique beauty of contemporary railroading in the West. The authors have included complete references as to cameras, lenses and film used in the more than 90 salon photos. T h e l a rge 872 X 9Y2 a lb u m format has 8 0 pages, litho g r a p h e d on h i g h- qu al i t y IOO-pound lacquered finish paper with perfect binding and soft cover.
Cnlifornin re!ldcnl1'ladd &
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