Description
Technical Manual (TM 9-1240-259-35) for Telescope M103 July 1961
This Technical Manual TM 9-1240-259-35 covers field and depot maintenance of the Telescope M103 and is dated July 1961.
The publication was written for trained maintenance personnel responsible for inspection, troubleshooting, repair, overhaul, assembly, and testing beyond the work normally performed by using organizations.
Historical Significance
The Telescope M103 was the direct-fire optical sight used with the 90 mm M67 recoilless rifle. It provided the optical line of sight needed to aim the weapon at visible targets.
Issued on July 31, 1961, this manual documents the higher-level maintenance system that supported the M103 telescope during the early service period of the M67. The telescope's M103 designation is separate from the M103 heavy tank.
Telescope M103 and the 90 mm M67 Recoilless Rifle
The Telescope M103 seated in the M110 Telescope Mount on the 90 mm M67 recoilless rifle. The mount held the telescope to the weapon and provided the adjustments needed for boresighting.
As a direct-fire sight, the telescope gave the operator an optical aiming line for the rifle. The documented maintenance work supported the telescope itself; operation and using-organization maintenance were covered in a separate M67 publication.
What This Manual Covers
TM 9-1240-259-35 provides field and depot maintenance instructions for the Telescope M103. Its scope includes the detailed work needed to inspect, diagnose, repair, overhaul, reassemble, and test the optical instrument.
- Description and technical data for the Telescope M103
- Tools and equipment used for maintenance
- Inspection in the hands of troops and in ordnance shops
- Troubleshooting, disassembly, cleaning, inspection, repair, and assembly
- Tests, adjustments, and final inspection
Key Features
- Publication number: TM 9-1240-259-35
- Publication date: July 31, 1961
- Equipment: Telescope M103
- Telescope NSN: 1240-00-788-1236
- Weapon application: 90 mm M67 recoilless rifle
- Maintenance level: field and depot
- Issuing authority: Headquarters, Department of the Army
Why This Manual Matters
This manual records the specialized maintenance methods used to keep the M103 direct-fire sight serviceable. It connects the telescope's optical assemblies and test requirements with its practical role on the M67 recoilless rifle.
The publication is also a focused reference for collections covering U.S. recoilless weapons, military optics, and Cold War ordnance maintenance.
About This Manual
This Department of the Army Technical Manual is numbered TM 9-1240-259-35 and dated July 31, 1961. It is the field and depot maintenance manual for Telescope M103, identified by NSN 1240-00-788-1236.
Ideal For
This manual is a strong fit for:
- U.S. military technical-manual collectors
- M67 recoilless rifle restoration researchers
- Military museums and reference libraries
- Fire-control optics historians
- Cold War infantry-weapons collections
Approx length 8", Approx width 10", Approx height .2", Approx weight .2lbs.
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