Description
Technical Manual TM 9-2300-216-20P Change 4 – M107 175mm Gun and M110 8-Inch Howitzer – November 1967
Item Overview
This November 1967 Change 4 publication updates TM 9-2300-216-20P. The parent manual is the U.S. Army organizational maintenance repair parts and special tools list for the M107 175mm self-propelled field artillery gun and M110 8-inch self-propelled howitzer. This update belongs with the original manual issued July 17, 1962. The item listed is the Change 4 publication, intended to amend that earlier reference rather than serve as a complete stand-alone manual.
Publication Details
The following details identify this change publication and the vehicles covered by its parent manual. FSN stands for Federal Stock Number, the supply identification system used on these period references.
- Manual and revision: TM 9-2300-216-20P, Change 4.
- Publication type: Organizational maintenance repair parts and special tools list update.
- Change date: November 1967.
- Original manual date: July 17, 1962.
- Issuing authority: Headquarters, Department of the Army.
- M107 175mm self-propelled field artillery gun: FSN 2350-436-6635.
- M110 8-inch self-propelled howitzer: FSN 2350-439-6243.
Function and Contents
The parent parts list identifies repair parts and special tools used for organizational maintenance, the work assigned to maintenance personnel within the operating unit. These references helped mechanics identify needed items and helped supply personnel prepare requests for them. Change 4 updates information in that reference and should be read with the parent manual so its revisions can be followed in context. The parts list supports the repair work described in the separate organizational maintenance manual.
Publication History
The parent manual was issued in July 1962, during the early years of the M107 and M110 program. Change 4 followed in November 1967, more than five years later, while both systems were in active service. Army change publications kept existing technical references up to date without replacing the entire manual with each revision. For collectors and researchers, the change number and date identify a specific stage in the publication's history and distinguish this update from other editions bearing the same manual number.
Documented Applications
This publication applies to the M107 and original M110 vehicles identified above. Both used a common tracked carriage, while their artillery weapons and some related equipment differed. A combined parts reference supported their shared vehicle design and the needs of each model. Its documented application is unit-level maintenance and supply support for these two heavy artillery systems. The listed stock numbers identify the complete vehicles covered, rather than individual repair parts.
Equipment History
The M107 and M110 formed a family of mobile heavy artillery vehicles introduced during the early 1960s. The M110 entered service in 1963. Their shared carriage used diesel power, tracks, and an open rear working area for the gun crew. A rear spade helped steady the vehicle during firing. The common carriage also allowed the Army to change the balance of 175mm guns and 8-inch howitzers as its needs changed. The M110 family continued to serve the Army and Marine Corps for more than 30 years.
Weapon-System Background
The M107 carried a long 175mm gun tube with a reach of almost 33 kilometers, or about 20 miles. This range made it useful for covering large areas with heavy artillery fire. The original M110 carried a shorter 8-inch howitzer and fired a projectile weighing about 200 pounds to almost 17 kilometers, or roughly 10.5 miles. It was valued for accurate heavy fire. Their different strengths explain why the Army fielded both weapons on the same basic vehicle platform.
History of Use
Both systems saw combat during the Vietnam War. Eight-inch howitzers served with most U.S. division artillery organizations, while field force artillery used both 8-inch howitzers and 175mm guns. Heavy batteries operated from prepared positions and fire support bases, with self-propelled artillery moving by ground convoy. Widely scattered firing units created added supply and maintenance demands. Parts-list updates were part of the technical support system used to maintain these vehicles and support the crews who depended on them.
Ideal For
This dated change publication is useful for building a military reference collection or studying the parts and supply records behind heavy artillery service during the 1960s.
- Collectors of U.S. Army technical manuals and change publications.
- M107 and M110 vehicle history enthusiasts.
- Researchers studying military maintenance and supply systems.
- Museums preparing exhibits on Vietnam-era artillery support.
- Owners of the July 1962 parent manual seeking its Change 4 update.
Approx length 8", Approx width 10", Approx height .1", Approx weight .1lbs.
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