Description
Own a serious piece of Vietnam War-era heavy artillery documentation with this Technical Manual Change 2 for TM 9-1000-218-35. This change notice covers the 175mm M113/T256E3 Gun Cannon, 8-Inch M2A1E1 Howitzer Cannon, and M158/T185 Mount.
This is a Change 2 update for the original TM 9-1000-218-35, issued August 20, 1962. It is not the full base manual. For collectors, that makes it a valuable companion piece for completing the publication history of the M107/M110 heavy artillery technical manual set.
Historical Significance
The original TM 9-1000-218-35 was a Field and Depot Maintenance Manual for the 175mm Gun Cannon M113 (T256E3), 8-inch Howitzer Cannon M2A1E1, Mount M158 (T185), and related loader and rammer equipment. AFV Database lists the original manual as published by Headquarters, Department of the Army on August 20, 1962.
This November 1966 Change 2 sits in an important period. The M107 175mm self-propelled gun and M110 8-inch self-propelled howitzer were becoming major Cold War and Vietnam-era artillery systems. The M107 and M110 used essentially the same vehicle with different tubes, giving the Army a shared heavy artillery platform for long-range 175mm gun fire and 8-inch howitzer fire.
The timing also matters from a maintenance standpoint. A 2012 NDIA historical presentation on the 175mm M113 cannon notes that a 175mm M113 tube failed during firing in Vietnam in April 1965 after 428 Equivalent Full Charge rounds, triggering investigation and changes to fatigue-life handling. That gives 1960s maintenance documentation for this system extra collector and research interest.
The M107 and M110 Heavy Artillery Connection
The equipment covered by this manual change is closely tied to two of the most impressive U.S. self-propelled artillery systems of the Cold War.
The M107 carried the 175mm M113 gun cannon. It became known for long-range fire support. The M107 was used extensively in Vietnam, could fire beyond 30 km, and took part in cross-DMZ artillery duels.
The M110 carried the 8-inch howitzer. Together, the M107 and M110 represented the Army’s heavy tracked artillery power during the Vietnam and Cold War period. The shared mount and vehicle-family connection make this manual change especially appealing to collectors of large-caliber artillery.
What This Change Covers
As Change 2 for TM 9-1000-218-35, this publication updated the field and depot maintenance manual for the heavy cannon, howitzer, and mount equipment listed above.
This manual change is especially relevant for:
- 175mm M113 / T256E3 gun cannon documentation
- 8-Inch M2A1E1 howitzer cannon reference
- M158 / T185 mount research
- M107 and M110 self-propelled artillery collections
- Vietnam War artillery research
- Cold War heavy artillery displays
- field and depot maintenance manual sets
- museum and archival reference libraries
- collectors completing a TM 9-1000-218-35 manual set
Manual changes are often harder to find than base manuals. They were working updates, and many were separated from the original publication over time.
Key Features
- Technical Manual Change 2 for TM 9-1000-218-35
- Covers the 175mm M113 / T256E3 Gun Cannon
- Covers the 8-Inch M2A1E1 Howitzer Cannon
- Covers the M158 / T185 Mount
- Dated November 1966
- Updates the original manual issued August 20, 1962
- Field and depot maintenance manual update
- Strong Vietnam War / Cold War heavy artillery subject
- Connected to the M107 175mm Self-Propelled Gun
- Connected to the M110 8-Inch Self-Propelled Howitzer
- Excellent companion piece for a complete technical manual set
Why This Collectible Stands Out
This is not a manual change for a common rifle, truck, or small accessory. It is tied to some of the biggest U.S. self-propelled artillery systems of the Vietnam era.
The M107 had range and battlefield presence. The M110 had heavy howitzer power. The M158/T185 mount connected both systems to the field and depot maintenance world that kept them running.
For collectors, this piece has real technical depth. It belongs with M107 manuals, M110 manuals, 175mm artillery references, 8-inch howitzer material, and serious U.S. Army ordnance documentation.
About This Manual Change
This listing is for Technical Manual Change 2 for TM 9-1000-218-35, covering the 175mm M113/T256E3 Gun Cannon, 8-Inch M2A1E1 Howitzer Cannon, and M158/T185 Mount, dated November 1966.
This listing is for the Change 2 update only unless otherwise stated. No complete base manual, cannon, howitzer, gun mount, loader, rammer, vehicle, ammunition, tools, parts, storage case, or additional accessories are included unless specifically shown or noted.
Ideal For
This manual change is a strong fit for:
- Vietnam War-era U.S. Army technical manual collections
- M107 175mm self-propelled gun reference libraries
- M110 8-inch self-propelled howitzer collections
- Cold War heavy artillery displays
- 175mm and 8-inch ordnance collectors
- field and depot maintenance manual collections
- U.S. Army Ordnance Department publication libraries
- museum and archival reference collections
- collectors completing a TM 9-1000-218-35 manual set
Approx length 10", Approx width 8", Approx height .2", Approx weight .2lbs.
Pictures are stock images of our inventory. Unless otherwise noted, you will not be receiving the exact item shown in the pictures. The pictures are representative of the item's general condition. The item you receive might be slightly better, or worse, condition than was shown in the pictures.
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