Description
TM 9-2300-216-20P Technical Manual for M107 175mm Gun and M110 8-Inch Howitzer - June 1968
Item Overview
This June 1968 edition of TM 9-2300-216-20P is a U.S. Army technical manual for the 175mm M107 Self-Propelled Field Artillery Gun and the 8-Inch M110 Self-Propelled Howitzer. It is an organizational maintenance repair parts and special tools list. This publication offers a period reference for the maintenance support behind two well-known heavy artillery vehicles of the Cold War and Vietnam War era.
Publication Details
The publication number identifies this manual within the Army's technical manual series. The Federal Stock Numbers, or FSNs, identify the two complete vehicles covered by the publication.
- Manual Number: TM 9-2300-216-20P
- Publication Type: Organizational Maintenance Repair Parts and Special Tools List
- Publication Date: June 1968
- Issuing Authority: Department of the Army
- M107 Application: 175mm Self-Propelled Field Artillery Gun, FSN 2350-436-6635
- M110 Application: 8-Inch Self-Propelled Howitzer, FSN 2350-439-6243
Function and Contents
The manual supports the identification of repair parts and special tools needed for organizational maintenance, meaning work assigned to maintenance personnel within the using unit. Its parts-list format helps personnel match component names and identifying numbers to supply requirements. This supports the process of finding and requesting replacement items. The “20P” designation marks its role as a parts and tools reference; maintenance procedures were provided in a separate manual. For today's reader, it helps explain how the Army linked vehicle upkeep with its military supply system.
Publication History
The June 1968 publication dates to a time when U.S. heavy artillery units were supporting operations in Vietnam. Army technical publications served different needs, including crew operation, repair procedures, and parts supply. TM 9-2300-216-20P filled the parts and special tools role at the organizational maintenance level. As a historical document, this edition records the way the Army presented maintenance supply information during that period. Its value extends beyond the vehicles themselves to the record of the people and systems that kept them in service.
Documented Applications
This publication covers the original M107 gun and M110 howitzer identified by the listed FSNs. Both used a common tracked carriage, which explains why they could share a maintenance support publication despite carrying different cannon tubes. Their shared vehicle design and model-specific equipment made correct identification important when selecting 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 diesel-powered tracked carriage carried the cannon on an open rear working platform. A large rear spade helped steady the vehicle during firing. This arrangement combined heavy weapons with their own means of movement, while the common carriage supported both models. The layout left the gun crew working in the open and gave these vehicles a distinct profile compared with artillery housed in enclosed turrets.
Weapon-System Background
The two weapons offered different strengths. The M107's 175mm gun could reach targets almost 33 kilometers, or about 20 miles, away. The original M110's 8-inch, or 203mm, howitzer fired a roughly 200-pound projectile to almost 17 kilometers, or about 10.5 miles, and was valued for its accuracy. Together, they gave commanders a choice between greater reach and precise heavy fire. Their shared carriage also allowed units to change the mix of gun and howitzer tubes to meet different mission needs.
History of Use
Both systems saw combat service in Vietnam. The 8-inch howitzer served with divisional artillery, while field force artillery used both the M110 and M107 to support troops across wider areas. Heavy batteries operated from established firing positions and firebases, answering calls for support within range. Widely scattered units created extra demands for supply and maintenance. Parts references supported the less visible work behind these missions: keeping replacement items moving to the personnel responsible for vehicle upkeep. This service history gives the manual a clear place within the wider story of Vietnam-era artillery.
Ideal For
This manual suits collections and research focused on military vehicles, technical publications, and the support work behind field artillery.
- Collectors of U.S. Army technical manuals and military publications
- Researchers studying M107 and M110 vehicle history
- Readers interested in Vietnam-era maintenance and supply practices
- Museums building artillery or military vehicle reference libraries
- Historic vehicle owners gathering period parts and tools references
Approx length 8", Approx width 10", Approx height .8", Approx weight 2lbs.
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