The San Diego Air & Space Museum may use the white United Tractor tug in the right side of this picture at their Gillespie Field annex:

(Source:
Flickr)
I found two pages with some information about the
TA-75A tug and
NC-8A GPU at the Patuxent River Naval Air Museum mentioned in a
previous post. According to the information on the accompanying sign:
Patuxent River Naval Air Museum wrote:
Moving Naval Aircraft Powered by a Ford 302 V-8 gasoline engine, the United Tractor TA-75A was designed to tow aircraft weighing up to 75,000 pounds. The rear deck could mount a gas turbine for starting jet aircraft engines. TA-75As were used on shore facilities, including austere operating sites. However, they were not used on aircraft carriers because of the fire hazard associated with gasoline.
The Naval Air Systems Command (NAVAIR) at NAS Patuxent River manages the development, testing, and life cycle support of tow tractors and all other aviation support equipment used by the Navy and Marine Corps.
Our Display Tractor PRNAM's tow tractor was used at NAS Patuxent River until it was delivered to the museum in the early 2000s.
Patuxent River Naval Air Museum wrote:
Powering Naval Aircraft Mobile electric power plants (MEPPs) are used on the flight decks of aircraft carriers and on shore facilities. MEPPs supply regulated electrical power for aircraft servicing, starting, maintenance, and testing. The NC-8A MEPP is electrically propelled, with front-wheel steering and rear-wheel drive. Its liquid-cooled diesel engine provides 115/200-volt, 3-phase, 400-hertz AC power and 28 volts DC power. All propulsion and electrical controls are located on two panels in the driver's compartment.
(Note: All current ground support—so-called "yellow gear"—equipment is now painted white due to environmental contamination issues associated with the yellow paint pigment.)
The Naval Air Systems Command (NAVAIR) at NAS Patuxent River manages the development, testing, and life cycle support of MEPPs and all other aviation support equipment used by the Navy and Marine Corps.
Our Display MEPP PRNAM's NC-8A MEPP served at NAS Patuxent River until it was delivered to the museum in the early 2000s.
Finally, I came across a relevant WIX thread about WWII aircraft tug paint colors:
Paint info for WWII Tug needed.
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