Ordnance Maintenance: Auxiliary Generator (Homelite Model HRUH-28) For Medium Tanks M4 and Modifications - TM 9-1731K War Department Technical Manual

a. This manual is for ordnance personnel. It contains detailed instructions for the removal, disassembly, inspection, repair, assembly, and maintenance of the auxiliary generator for the medium tanks M4, M4A1, and M4A3, and 90-mm gun motor carriage M36B1. The information and the using arms. The pertinent operator's technical manuals for major items incorporating this materiel contain operating and lubricating instructions for the materiel and contain all maintenance operations allocated to using organizations in performing maintenance work within their scope. 1.1 Forms, Records, and Reports a. General. Forms, records, and reports are designed to serve necessary and useful purposes. Responsibility for the proper execution of these forms rests upon commanding officers of all units maintaining this equipment. It is emphasized, however, that forms, records, and reports are merely aids. They are not a substitute for thorough practical work, physical inspection, and active supervision. b. Authorized Forms. The forms, records, and reports generally applicable to units maintaining this equipment are listed in the appendix. No forms other than approved Department of the Army forms will be used. For a current and complete listing of all forms, see current SR 310-20-6. c. Field Report of Accidents. The reports necessary to comply with the requirements of the Army safety program are prescribed in detail in the SR 385-10-40 series of special regulations. These reports are required whenever accidents occur involving injury to personnel or damage to materiel. Department of the army Washington 25, D. C, 20 November 1950 d. Report of Unsatisfactory Equipment or Materials. Any suggestions for improvement in design, maintenance, safety, and efficiency of operation prompted by chronic failure or malfunction of the materiel, spare parts, or equipment, or as to defects in the application or effect of prescribed petroleum fuel, lubricants, and/or preserving materials will be reported through technical channels as prescribed in SR 700-45-5 to the Chief of Ordnance, Washington 25, D. C, ATTN: ORDFM, using DA AGO Form 468, Unsatisfactory Equipment Report. Such suggestions are encouraged in order that other organizations may benefit. a. Section II lists of related parts. Section X gives data pertaining to special tools intended for ordnance personnel. a. The auxiliary generator shock absorbing feet. A metal duct containing the muffler is included with the units used in the M4, and M4A1 tanks for the purpose of carrying off engine heat from the crew compartment in hot weather and as an aid in preheating the main engine compartment in cold weather. 4. Distinguishing Characteristics A variation of design is found in the auxiliary generators (Homelite Model HRUH-28) furnished for installation in the medium tanks and 90-mm gun motor carriage. The difference is that not all of the auxiliary generators are equipped with an exhaust heater duct assembly. The power plant for the auxiliary generators is the same. Refer to figure 23 for identification of the duct assembly. Units, complete with duct Units, with muffler and fittings 6. Field and Depot Maintenance Allocation The publication of instructions for complete disassembly and rebuild is not to be construed as authority for the performance by field maintenance units of those functions which are restricted to depots and arsenals.

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