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Category: Cummins diesel engines. ... Cummins X-series engine This page was last edited on 29 December 2013, at 19:49 (UTC). Text is available under the Creative ...
The M123A1 built in the 1960s had a Cummins V8‑300, a 785 cu in (12.9 L) naturally aspirated V8 diesel engine developing 300 hp (220 kW) at 3000 rpm and 580 lbf⋅ft (786 N⋅m) torque at 2100 rpm. This engine was also retrofitted into M123 to make M123E2.
The F Model offered 5 different diesel engines, Mack's Maxidyne and Thermodyne at 260-375 hp, Cummins - 250-350 hp, Detroit Diesel - 270-430 hp and Caterpillar - 325 hp. Cat3406 is a big-bore diesel available in both high-torque-rise and conventional torque-rise versions; Detroit Diesel 71 series, provided power with a high torque curve.
All models of the M939 share a common basic chassis, cab, hood, and fenders. The basic truck is a 6×6 (three axles, six wheels, all of which are powered) heavy truck. Early M939s were rebuilds of M809 vehicle chassis with a new automatic transmission, transfer cases, cab, and hood. Suffix –A2 are new production with later model Cummins engine.
A near unlimited range of engines, transmissions, and rear axles were available for what was usually a built-to-order truck. The biggest diesel available was the Cummins V-903, a giant 903 cu in (14,794 cc) unit with a modest 289 hp (216 kW) max output.
To accommodate larger-bore diesel engines under a standard-length hood, the S2200 was fitted with a widened cab (distinguished by a two-piece windshield). In 1982, the S2300 was introduced; the model line was essentially an S2100 with International diesel engines replaced with Cummins-sourced powertrains. [5] 1978–1983 models
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For 1968, the CO-4000 was given an update, with the standard engine becoming the turbocharged IHC DVT573 diesel V8 with optional diesel Cummins and Detroit Diesel engines. Internally known as the CO/COF-4070A and as COF-4090A (with a raised cab), the new truck was marketed as the Transtar. For 1970, two new models were introduced.