Description
Technical Manual Change 1 (TM 9-1240-218-35P) for M13/T46E1 and M13A1/T46E4 Range Finders February 1967
This Technical Manual Change 1 for TM 9-1240-218-35P updates the repair-parts and special-tools lists for the M13/T46E1 and M13A1/T46E4 Fire-Control Range Finders and is dated 3 February 1967.
The notice applies to the original TM 9-1240-218-35P, dated 15 September 1958. It is an official change publication and is not the complete base manual.
Historical Significance
The M13 and M13A1 were stereoscopic range finders used in the mechanical fire-control systems of early M48-series 90 mm gun tanks. Before laser ranging became standard, these turret-mounted optical instruments allowed the crew to determine target distance and feed range information into the tank's fire-control system.
Change 1 reflects the Army's transition from the older third-, fourth-, and fifth-echelon maintenance terms to direct support, general support, and depot maintenance. It also updated the publication's title and supply-identification information for the range finders.
Change 1 Updates to the Base Manual
Change 1 revised the official title to identify the equipment as Range Finder, Fire Control: M13/T46E1 and M13A1/T46E4. It added stock numbers 1240-344-4654 for the M13 and 1240-508-5166 for the M13A1.
The notice also replaced the older maintenance-echelon wording throughout the manual and directed users to delete references to the Technical Service number column. Additional replacement pages revised information within the original parts publication.
What This Manual Covers
This change notice updates a parts and special-tools reference for support of the M13 and M13A1 Range Finders. Its purpose is to bring the 1958 publication's title, maintenance terminology, stock-number identification, and affected listing pages into line with later Army practices.
The underlying -35P manual supports identification and requisitioning of repair parts used at direct support, general support, and depot levels. Change 1 should be used with the base manual and does not contain the full original parts listing by itself.
Key Features
- Publication: Change 1 to TM 9-1240-218-35P
- Change date: 3 February 1967
- Base-manual date: 15 September 1958
- Equipment covered: M13/T46E1 and M13A1/T46E4 Fire-Control Range Finders
- M13 stock number: 1240-344-4654
- M13A1 stock number: 1240-508-5166
- Maintenance scope: direct support, general support, and depot repair parts and special tools
Why This Manual Matters
Official change notices preserve the corrections and revised terminology required to use a base technical manual as the Army intended. This notice documents how the M13 and M13A1 range-finder parts publication was updated nearly nine years after its original issue.
It is especially useful to collectors and restoration researchers who already have TM 9-1240-218-35P and want the later title, stock numbers, maintenance-level terminology, and replacement-page information associated with Change 1.
About This Manual
Issued by Headquarters, Department of the Army, on 3 February 1967, this is Change 1 to TM 9-1240-218-35P. The base manual was issued on 15 September 1958.
This publication contains only the Change 1 updates. It is not a complete substitute for the original field- and depot-maintenance repair-parts and special-tools manual.
Ideal For
This change notice is a strong fit for:
- Collectors who own TM 9-1240-218-35P
- M48 Patton restoration and research projects
- Military fire-control and optical-instrument researchers
- Armored-vehicle museums and reference libraries
- Collectors of official Army manual changes
Approx length 8", Approx width 10", Approx height .1", Approx weight .1lbs.
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