This Technical Manual Change 4 for TM 5-3431-200-15 covers the Westinghouse Model SA-135 Arc Welding Set, identified under FSN 3431-879-9709, and is dated April 1968. This change was issued for the original TM 5-3431-200-15 manual dated August 29, 1962, making it an important companion document for collectors, researchers, restorers, and anyone building a serious reference library around U.S. Army maintenance equipment and Cold War technical literature.
Unlike a full base manual, this item is an official Change 4 publication. That means it was issued to revise and update the original manual rather than replace it outright. For collectors, that matters. Army manuals were routinely kept current through numbered changes, and surviving change issues help document how technical guidance, maintenance procedures, and service information evolved while the equipment remained in use. In that sense, this is not just a supplemental insert. It is part of the actual service history of the manual.
The Westinghouse Model SA-135 Arc Welding Set
The Westinghouse Model SA-135 Arc Welding Set belongs to the broader family of military shop, maintenance, and field-support equipment. As identified by its nomenclature, it is an arc welding set, placing it squarely in the support side of Army operations rather than in the category of conventional weapons or combat vehicles.
Equipment in this class was associated with fabrication, repair, structural maintenance, and general support work where welding capability was essential. In military service, a machine like the SA-135 would have been relevant to maintenance shops, engineer units, repair depots, and field service operations where damaged equipment or structures had to be repaired and kept operational.
For collectors, that makes this manual change especially interesting because it documents the technical side of Cold War military maintenance equipment rather than more commonly seen combat hardware. It also has strong crossover appeal for collectors of military shop equipment, industrial Westinghouse material, and U.S. Army support systems. The inclusion of FSN 3431-879-9709 adds cataloging value for collectors who prefer manuals with a specific government stock-number reference rather than only general nomenclature.
What This Manual Change Covers
Because this publication is a change to TM 5-3431-200-15, it belongs to the maintenance and service side of Army documentation. In practical terms, a manual change like this is especially relevant for updated service information related to:
Since this is Change 4 for the August 29, 1962 issue, it is especially useful to collectors who want to pair it with the original base manual and preserve the manual as it was actually updated and used in service.
Historical Significance
The date April 1968 places this publication in the Cold War period, when the U.S. military maintained extensive technical literature covering not only weapons and vehicles, but also the shop and maintenance equipment required to sustain field operations. Manuals and change sheets like this reflect a period when Army documentation extended into every part of the logistical chain, including welding equipment, repair tools, maintenance machinery, and field-support systems.
For collectors and historians, this manual change is especially relevant to subjects such as:
Because it covers a specialized arc welding set rather than a more common tactical vehicle or weapon system, it also adds variety to collections that already include standard ordnance or maintenance manuals.
About This Item
This listing is for Technical Manual Change 4 for TM 5-3431-200-15 covering the Westinghouse Model SA-135 Arc Welding Set, identified under FSN 3431-879-9709 and dated April 1968. It was issued for the August 29, 1962 printing of the original technical manual.
It is especially well suited for:
Because manuals were working documents, surviving examples are valued not only for their content, but also for their connection to real military maintenance and support practice.
Why This Manual Matters
Many military manuals focus only on base editions, but change sheets are a major part of how Army documentation was actually maintained in service. This item adds a layer of authenticity and completeness that a base manual alone does not always provide.
For collectors, it is a useful companion piece to the original TM 5-3431-200-15. For researchers, it helps document the continued maintenance and service history of the Westinghouse Model SA-135 Arc Welding Set. For museums, it adds context to the administrative and technical side of military welding and repair equipment that is often overlooked in favor of more visible hardware.
Ideal For
This manual is a strong fit for:
Approx length 10", Approx width 8", Approx height .1", Approx weight .1lbs.
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