**M38 1/4 Ton 4x4 Utility Truck Maintenance Manual** This comprehensive service manual, originally published in January 1956 as US Army Manual TM9 8912, provides detailed instructions for operating and maintaining the M38 1/4 Ton Utility Vehicle. The manual covers a wide range of topics, including operation, organizational maintenance, and descriptions of major units and their functions within the vehicle. It offers valuable information regarding modifications and updates made to the M38 throughout its production run and includes specific details on changes introduced after the initial release of TM 9-804 in September 1950. These updates encompass components such as the ignition switch, starter mounting, generator, bell housing, clutch linkage, crankshaft pulley, vent lines, decalcomania, engine rear plate, fuel tank cap, distributor and voltage regulator harness assembly, speedometer cables, crankcase control valve, fuel filter element, oil filter flexible inlet line, carburetor to fuel pump line, thermostat housing retainer, polarizing bracket for trailer coupling connector receptacle, stop light switches, and front axle brake line clamps. Additionally, the manual revises information on the light switch, nameplates, Alemite fittings, instrument cluster, gear oil specification, forms, records, and reports, as well as special tools and equipment for organizational maintenance. It also removes reference to the cartridge-type oil filter, which was used only on pilot models. The manual serves as a valuable resource for owners and enthusiasts of the M38, providing essential information for maintaining and restoring this iconic vehicle.

The Willys M38 1/4 Ton 4x4 Utility Truck, often simply referred to as the M38, was a highly successful military vehicle produced by Willys-Overland Motors from 1950 to 1952. It was designed to replace the iconic Willys MB, the Jeep that served so prominently in World War II. The M38 inherited many of the MB's design features, including its rugged and compact chassis, 4x4 drivetrain, and overall utilitarian design, but with significant improvements. Key enhancements included a larger and more powerful engine, a more comfortable and versatile cab with a canvas top, and a refined suspension system that offered greater ride comfort and off-road capability. The M38 was also the first U.S. military vehicle to feature a 12-volt electrical system, which allowed for the use of more powerful accessories and equipment. The M38's versatility and reliable performance made it a popular choice for a wide range of military applications, from troop transport and reconnaissance to towing artillery pieces and carrying supplies. It distinguished itself in the Korean War, proving its worth in harsh combat conditions. Beyond its military service, the M38 found civilian applications as well, becoming a popular choice for farmers, ranchers, and off-road enthusiasts. While the M38 was eventually replaced by the M38A1 in the early 1950s, its legacy continues to be felt today, with the vehicle enjoying a devoted following among collectors and enthusiasts who appreciate its ruggedness, practicality, and historical significance. This maintenance manual provides detailed information on the operation, maintenance, and repair of the Willys M38, ensuring that this classic vehicle can continue to be used and enjoyed for years to come.