Ordnance Maintenance, Tracks and Suspension, Turret and Hull for Medium Tanks M4, and Modifications - TM 9-1750K War Department Technical Manual

a. The instructions contained in this manual are for the information and guidance of personnel charged with the maintenance and repair of Medium Tanks M4, M4A1, M4A2, M4A3, M4A4, and M4A6. Figure 1 illustrates Medium Tank M4. These instructions are supplementary to the Field and Technical Manuals prepared for the using arms. This manual does not contain information which is intended primarily for the using arms, since such information is available to ordnance personnelin the 100-series TM's and FM's. b. This manual contains a description of, and procedure for, removal, disassembly, inspection, repair and assembly of the tracks and suspension, turret and hull, and turret electrical system for Medium Tanks M4 and modifications. Refer to pertinent operator's manuals and pertinent 1700-series maintenance manuals for information not contained in this TM. (See list of references in the back of this manual.) a. Scope. The scope of maintenance and repair by the crew and other units of the using arms is determined by the availability of suitable tools, availability of necessary parts, capabilities of the mechanics, time available and the tactical situation. No exact system of procedure can be prescribed. b. Allocation of Maintenance. The maintenance duties for which, under normal circumstances, tools and parts have been provided for the using arm and ordnance maintenance personnel are indicated in pertinent using arm 100-series manuals. Certain replacements and repairs are the responsibility of ordnance personnel but may be performed by the using arm personnel when circumstances permit or require, within the discretion of the commander concerned. Echelons and words as used in this list of maintenance allocations are denned as follows: is missing from book! is missing from book! Notes: (1) Operations allocated will normally be performed in the echelon indicated by "X." (2 ) Operations allocated to the third echelon as indicated by "E" may be performed by these units in emergencies only. (3) Operations allocated to the four echelon by "E" are normal fifth echelon operations. They will not be performed by the fourth echelon, unless the unit is expressly authorized to do so by the chief of the service concerned., (4) Technical Bulletins of the 2830-series should not be consulted for detailed information relative to reclamation procedure. Electrical group Batteries — Box, terminal — replace X Box, turret collector ring — replace X Box, turret collector ring — repair X Box, turret collector ring — rebuild X Brackets, mounting and supports — replace X Brackets, mounting and supports — repair X Breakers, circuit — replace and/or repair X Cables, battery — replace and/or repair X Generator assembly, auxiliary — adjust and/or Generator assembly, auxiliary — repair X Generator assembly, auxiliary — rebuild, E X Lamp assemblies — service and/or replace X Lamp assemblies — repair X Regulators, current and voltage — replace X Regulators, current and voltage — adjust and/or Regulators, current and voltage — rebuild X ELECTRICAL GROUP (Cont'd).

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