Description
Technical Manual (TM 9-1240-216-34) for M19 and M24 Tank Periscopes August 1980
This Technical Manual TM 9-1240-216-34 covers the M19 and M24 Tank Periscopes in old and new configurations and is dated August 1980.
The publication combines Volume I - Troubleshooting and Volume II - Maintenance for direct and general support personnel responsible for these active-infrared vehicle night-vision instruments.
Historical Significance
The M19 and M24 belong to an early generation of armored-vehicle night-vision equipment that depended on vehicle-mounted infrared headlamps. The headlamps illuminated the area ahead with invisible infrared energy, and the periscope converted the reflected energy into a visible image for the crew member.
This manual documents both the older instruments and their updated configurations in one support reference. The M19 and M19A1 were used in the M113 family, while the manual also directs maintainers to vehicle publications for the M60, M60A1, M60A1 RISE, and M728 Combat Engineer Vehicle when removing the periscope head assembly.
M19 and M24 Configuration Coverage
The manual separates procedures where the older and newer configurations differ. The new M19 and M24 configurations eliminated the individual left and right focus controls used on the older instruments, while the M24 configuration also used an extender and longer plate to increase periscope height.
The four documented configurations are identified by stock number and by the nameplate on the instrument. This makes the publication useful for matching an installed periscope to the correct maintenance procedure.
What This Manual Covers
Volume I - Troubleshooting provides checkout flowcharts, a fault-symptom index, step-by-step fault-isolation procedures, wiring diagrams, and instructions for assembling the power supplies used during testing.
Volume II - Maintenance covers inspection upon receipt, general maintenance information, special tools and test equipment, repair procedures, final inspection, packaging, expendable supplies and materials, and a maintenance-task index.
The technical data describes both models as 1-power binocular periscopes with a 26.8-degree field of view and a 16,000-volt DC operating circuit. The manual explains the head assembly, body assembly, image-converter tubes, eyepieces, trunnion, locking assembly, and adjustable headrest.
Key Features
- Official publication number: TM 9-1240-216-34
- Publication date: 29 August 1980
- Equipment covered: M19 and M24 Tank Periscopes, old and new configurations
- M19 stock numbers: 6650-00-765-2971 and 1240-01-005-6035
- M24 stock numbers: 6650-00-344-4647 and 1240-01-005-6036
- Maintenance level: direct support and general support
- Technical scope: troubleshooting, repair, wiring, inspection, testing, and packaging
Why This Manual Matters
TM 9-1240-216-34 is a detailed source for understanding how the Army diagnosed and repaired active-infrared tank periscopes at support shops. Its flowcharts and configuration-specific procedures connect the visible symptoms of a failed instrument with the electrical, optical, and mechanical work needed to return it to service.
The publication is especially useful when researching the transition from the older M19 and M24 assemblies to the updated M19A1 and M24A1 configurations. It preserves official nomenclature, stock numbers, part numbers, test requirements, and support procedures for all four versions.
About This Manual
Published by Headquarters, Department of the Army, on 29 August 1980, TM 9-1240-216-34 is the direct and general support maintenance manual for the M19 and M24 Tank Periscopes. It superseded TM 9-6650-216-34, March 1960.
The manual is arranged as two volumes within one publication: Volume I - Troubleshooting and Volume II - Maintenance.
Ideal For
This manual is a strong fit for:
- U.S. Army technical-manual collectors
- Military optics and early night-vision researchers
- M113, M60-series, and M728 vehicle restoration projects
- Armored-vehicle museums and reference libraries
- Researchers studying direct and general support maintenance
Approx length 8", Approx width 11", Approx height 1", Approx weight 2.5lbs.
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