Description
Technical Manual (TM 9-1240-239-35P) for M28/T46 and M28C Periscope Sights February 1961
This Technical Manual TM 9-1240-239-35P covers repair parts and special tools for the M28/T46 and M28C Periscope Sights and is dated 14 February 1961.
The publication is a field- and depot-maintenance parts reference for personnel identifying, stocking, requisitioning, and planning support for these armored-vehicle fire-control optics.
Historical Significance
The M28/T46 and M28C belonged to a family of monocular optical sighting instruments used as components of armored-vehicle fire-control systems. They allowed vehicle crews to aim mounted weapons through protected periscopic viewing positions.
Published during the early Cold War, this manual documents the repair-parts supply structure used to support the sights beyond the operator level. It replaced the earlier ORD 8 SNL F-402 parts publication dated 31 October 1956.
M28/T46 and M28C Vehicle Applications
The documented sight models served across several tracked armored vehicles and weapon systems. These applications explain why the periscope family appears in tank, personnel-carrier, mortar-carrier, and flame-thrower restoration research.
- The M28/T46 was used with the M59 armored personnel carrier equipped with the preferred M13 cupola, the M84 4.2-inch self-propelled mortar, and M48A1 and M48A2 90 mm gun tanks
- The M28C was used with M67A1 and M67A2 flame throwers, M48A2C and M48A3 90 mm gun tanks, and M60 and M60A1 105 mm gun tanks
What This Manual Covers
This -35P parts manual lists repair parts and special tools authorized for field and depot maintenance of the M28/T46 and M28C Periscope Sights. It supports parts identification, requisitioning, stock decisions, and maintenance supply planning.
For third-echelon maintenance, the publication identifies items authorized for initial stock and supply support to second-echelon users. It also covers initial stock for fourth-echelon maintenance and provides fifth-echelon guidance for recommended repair parts used in rebuilding major components or end items.
The manual includes requisition notes and the period supply terminology needed to interpret the listed repair parts. Its purpose is parts support rather than complete operating or repair procedures.
Key Features
- Official publication number: TM 9-1240-239-35P
- Publication date: 14 February 1961
- Equipment covered: M28/T46 and M28C Periscope Sights
- Publication scope: field- and depot-maintenance repair parts and special tools lists
- Supply scope: third-, fourth-, and fifth-echelon maintenance support
- Superseded publication: ORD 8 SNL F-402, dated 31 October 1956
- Issuing authority: Headquarters, Department of the Army
Why This Manual Matters
TM 9-1240-239-35P preserves the official Army parts terminology and maintenance-supply structure used for two important armored-vehicle periscope sights. It helps researchers connect the sight assemblies with the repair and stocking system that supported them.
The publication complements the related TM 9-1240-239-35 maintenance manual by focusing specifically on authorized parts and special tools rather than detailed troubleshooting and repair procedures.
About This Manual
Issued by the Headquarters, Department of the Army on 14 February 1961, TM 9-1240-239-35P is a field- and depot-maintenance repair-parts and special-tools publication for the M28/T46 and M28C Periscope Sights.
The manual supersedes ORD 8 SNL F-402, dated 31 October 1956. It is the parts-support publication for the sight family and is distinct from the full maintenance manual TM 9-1240-239-35.
Ideal For
This manual is a strong fit for:
- U.S. Army technical-manual collectors
- M48 and M60 tank restoration researchers
- M59 personnel-carrier and M84 mortar historians
- M67 flame-thrower vehicle researchers
- Military optics and fire-control reference collections
- Museums, archives, and restoration libraries
Approx length 8", Approx width 10", Approx height .2", Approx weight .4lbs.
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