Description
Technical Manual (TM 9-1240-271-35P) for M118 Periscope Mount October 1970 FSN 1240-796-9686
This Technical Manual TM 9-1240-271-35P covers repair-parts and special-tools information for the M118 Periscope Mount, FSN 1240-796-9686, and is dated October 1970.
The publication supports maintenance and supply work by providing a dedicated parts reference for the M118 mount. It is the parts-oriented companion to the mount's maintenance instructions.
Historical Significance
The M118 Periscope Mount formed part of a tank gunner's optical sighting installation. Army documentation linked the mount with the M32 infrared gunner's periscope, where the mount's alignment and stability affected the ability to boresight the sighting system.
The October 1970 edition reflects the Army's support system for specialized optical and fire-control components. It remained part of the M118 publication set until a combined maintenance and repair-parts manual replaced it in 1983.
M118 Mount and M32 Infrared Periscope Support
Later Army maintenance instructions for the M48A5 tank direct personnel to check the M118 mount when the gunner's M32 infrared periscope cannot be boresighted. This relationship shows why a component-level parts manual for the mount was important to tank fire-control support.
What This Manual Covers
TM 9-1240-271-35P is the repair-parts and special-tools publication for the M118 Periscope Mount. It supports identification of service parts and applicable support items associated with maintenance of the mount.
The manual focuses on the M118 rather than operation of the complete tank or periscope. Its role is to complement maintenance instructions with the parts and supply information needed for component-level support.
- Repair-parts reference for the M118 Periscope Mount
- Special-tools information associated with support of the mount
- Identification of the documented equipment by FSN 1240-796-9686
- Parts support for a mount associated with the M32 infrared gunner's periscope
Key Features
- Publication: TM 9-1240-271-35P
- Equipment: Mount, Periscope M118
- Federal Stock Number: 1240-796-9686
- Publication date: October 1970
- Publication type: Repair-parts and special-tools reference
- Issuing authority: Department of the Army
Why This Manual Matters
Parts manuals preserve supply and component-identification information that may not appear in broader vehicle publications. This manual provides a focused reference for research involving the M118 mount and its maintenance-support system.
It is useful as a companion to TM 9-1240-271-35 and as part of a reference collection covering U.S. tank optics, periscope installations, or fire-control maintenance.
About This Manual
This Department of the Army publication is TM 9-1240-271-35P, dated October 1970. It documents repair-parts and special-tools support for the M118 Periscope Mount under FSN 1240-796-9686.
The October 1970 publication was later superseded by TM 9-1240-271-34&P, dated December 1983, which combined maintenance and repair-parts coverage for the M118 and M118E1 mounts.
Ideal For
This manual is a strong fit for:
- Military technical-manual collectors
- M48A5 tank restoration researchers
- Tank fire-control and optical-system specialists
- Maintenance and supply-reference collections
- Museum and military-history libraries
Approx length 8.5", Approx width 11", Approx height .25", Approx weight .5lbs.
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