Description
Technical Manual Reprint (TM 9-1240-248-35) for M44 and M44C Infinity Sights July 1964
This Technical Manual Reprint TM 9-1240-248-35 covers the M44 and M44C Infinity Sights and is dated July 1964.
This official reprint incorporates current pages from Change 1, which also revised the publication title. It is a direct support, general support, and depot maintenance reference for these armored-vehicle fire-control sights.
Historical Significance
The M44 family belonged to the optical fire-control equipment used on major U.S. Army armored vehicles during the Cold War. These infinity sights worked with gunner's periscopes to place an illuminated circular aiming reference in the unity-power view for coaxial machine-gun employment.
The M44 was paired with the M29 periscope in the M103A1 heavy tank fire-control installation. The related M44C worked with the M31 periscope in M60 tank and M48A3 tank installations, connecting this manual to several important generations of American armored fighting vehicles.
Equipment and Vehicle Applications
The two sight models performed the same basic auxiliary aiming role but were configured for different periscope and vehicle installations. Their use alongside the gunner's periscope gave the crew an illuminated reticle reference for the coaxial machine gun while retaining the periscope's broad unity-power field of view.
- M44 Infinity Sight — FSN 1240-611-6492: used with the M29 periscope in the M103A1 heavy tank
- M44C Infinity Sight — FSN 1240-676-2181: used with the M31 periscope in M60 and M48A3 tank fire-control installations
- Fire-control function: projects an illuminated circular aiming reference into the periscope view for coaxial machine-gun aiming
What This Manual Covers
This -35 maintenance manual supports direct support, general support, and depot-level work on the M44 and M44C Infinity Sights. Its maintenance depth is intended for personnel servicing the sight assemblies beyond operator and organizational levels.
The publication provides the technical information needed to diagnose faults, disassemble and inspect the sight assemblies, repair or replace authorized components, reassemble and adjust the units, and perform tests required to return the sights to service.
- Maintenance information for both M44 and M44C configurations
- Optical, mechanical, and illuminated-reticle system support
- Troubleshooting, inspection, repair, adjustment, and testing guidance
- Direct support, general support, and depot maintenance scope
Key Features
- Official publication number: TM 9-1240-248-35
- Publication date: July 1964
- Equipment covered:
- M44 Infinity Sights - FSN: 1240-611-6492
- M44C Infinity Sights - FSN: 1240-676-2181
- Maintenance levels: direct support, general support, and depot
- Format: reprint incorporating current Change 1 pages and the Change 1 title revision
Why This Manual Matters
TM 9-1240-248-35 documents the maintenance of a specialized aiming component that is easily overlooked in broader tank histories. It explains the support requirements behind the illuminated auxiliary sights used with the gunner's periscopes of the M103A1, M60, and M48A3.
For restorers and researchers, the manual helps connect specific sight models and stock numbers with their associated periscopes and vehicle installations. For technical-manual collectors, the incorporated Change 1 pages preserve the revised Army maintenance information in a single reprint issue.
About This Manual
Published by Headquarters, Department of the Army and dated July 1964, TM 9-1240-248-35 is the direct support, general support, and depot maintenance manual for the M44 and M44C Infinity Sights.
This copy is identified on its cover as a reprint that includes current pages from Change 1. The cover also states that the publication title was changed by Change 1.
Ideal For
This manual is a strong fit for:
- U.S. Army technical-manual collectors
- M103A1, M60, and M48-series tank restorers
- Military optics and fire-control researchers
- Armor museums and reference libraries
- Collectors studying Cold War tank sighting equipment
Approx length 8", Approx width 10", Approx height .2", Approx weight .3lbs.
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