6U is the narrow gauge version of the D4. Same engine used in the 7U wide gauge series.
Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.
Chapter Nineteen
| Cnr Hiller Lane and Ballarat Road, Hamilton, Vic, 3300Chapter Two
| Pitt Farm, Little Paxton, St Neots, Cambridgeshire, PE19 6HD, UKChapter Fifteen
| Historic Santa Margarita Ranch, 20000 El Camino Real, Santa Margarita, CA 93453, USAChapter Thirty
| Hartley - South Australia
Antique Caterpillar
Machinery Owners Club
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Salem, OR 97301
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