Description
TM 9-2300-216-20 Change 4 – M107 175mm Self-Propelled Field Artillery Gun and M110 8-Inch Self-Propelled Howitzer – October 1966
Item Overview
TM 9-2300-216-20 Change 4 is the October 1966 update to the U.S. Army organizational maintenance manual for the M107 175mm self-propelled field artillery gun and M110 8-inch self-propelled howitzer. It belongs with the original manual issued on June 17, 1962. This change publication is a useful addition to a military technical manual collection, especially for those studying heavy artillery and its maintenance during the Vietnam War era.
Publication Details
The manual number, change designation, dates, and vehicle stock numbers identify this publication within the Army's maintenance reference series.
- Publication: TM 9-2300-216-20, Change 4.
- Publication type: Organizational maintenance technical manual update.
- Change date: October 1966.
- Original manual date: June 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
Change 4 revises the maintenance guidance in the parent manual and is intended to be read with that publication. The base manual covers service upon receipt, lubrication, preventive maintenance, troubleshooting, and work on the engine, fuel system, cooling system, electrical equipment, transmission, tracks, and suspension. It also addresses the weapon mount, armament, and sighting equipment. Its maintenance allocation chart assigns work to the proper maintenance level. These subjects describe the scope of the parent manual that this change updates.
Publication History
The original TM 9-2300-216-20 appeared in June 1962, near the beginning of these vehicles' service lives. The Army used numbered changes to revise technical guidance between full manual editions. Issued more than four years later, the October 1966 Change 4 forms part of that continuing publication record. For researchers, its date and change number help establish which version of the maintenance instructions was available during a particular period.
Documented Applications
This publication applies to the M107 gun and original M110 howitzer identified above. The parent manual was written for organizational maintenance personnel responsible for keeping these vehicles serviceable within their units. Both vehicles combined a tracked carrier with a heavy artillery weapon, so maintenance involved the driving components as well as the mounted gun or howitzer. The manual's assigned maintenance responsibilities helped units determine which work they could perform and which repairs required support from another maintenance level.
Equipment History
The M107 and M110 belonged to the Army's early 1960s generation of mobile heavy artillery. The M110 entered service in 1963. Their shared tracked carriage used diesel power and carried the weapon on an open rear platform. A large rear spade helped steady the vehicle during firing. This common vehicle design supported two different artillery roles while allowing many carrier components to be shared. The M110 family continued in Army and Marine Corps service, through later models, for more than 30 years.
Weapon-System Background
The M107's 175mm gun could reach targets nearly 33 kilometers away, or about 20 miles. That long reach made it valuable for covering large areas and supporting troops beyond the range of lighter artillery. The original M110's 8-inch howitzer fired projectiles weighing about 200 pounds to almost 17 kilometers, or roughly 10.5 miles. It was known for accurate, powerful fire. Together, these weapons gave commanders a choice between greater range and a heavier projectile.
History of Use
Crews trained on these heavy artillery systems in the United States before overseas deployment. Both weapons saw combat in Vietnam, where they operated from established firing positions and fire support bases. The 8-inch howitzer served with division artillery, while field force artillery used both calibers. Some units changed the mix of guns and howitzers to meet local needs because the weapons shared a carriage. These heavy vehicles moved between positions in ground convoys. Their service placed steady demands on supply and maintenance personnel supporting widely scattered artillery units.
Ideal For
This dated change publication suits collections and research focused on Army maintenance literature and Cold War heavy artillery.
- Collectors of U.S. Army technical manuals and numbered change publications.
- M107 and M110 military vehicle enthusiasts.
- Researchers studying Vietnam War artillery maintenance.
- Museums building reference collections for heavy artillery exhibits.
- Owners of the June 1962 parent manual assembling its publication history.
Approx length 8", Approx width 10", Approx height .1", Approx weight .15lbs.
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