Caterpillar Plataforma rastreada en orden cronológico

The grader was based on the Caterpillar Twenty.

Model Ten (PT1-PT4929):

• 1928 PT1-PT7;
• 1929 PT8-PT3173;
• 1930 PT3174-PT4606;
• 1931 PT4607-PT4751;
• 1932 PT4752-PT4929.

The Caterpillar Model Ten was the smallest tractor that Caterpillar ever made. There where several versions produced: Narrow, Wide and High Crop. The High Crop was produced for mainly farming purposes with approximately 420+/- made in the year of 1930.

Model Fifteen PV Series (PV1-PV7559):

• 1929 PV1-PV4023;
• 1930 PV4024-PV7205;
• 1931 PV7206-PV7311;
• 1932 PV7312-PV7559.

Introduced in late 1931, the Caterpillar Fifty (5A) was first released with the "FIFTY" nomenclature cast on the sides of the radiator housing and had the fuel tank in front of the operator. By 1933 the designation was moved to the front of the radiator, and the fuel tank was moved to behind the operator's seat.

Model 8C series (8C1-8C652):

• 1932 8C1-8C350;
• 1933 8C351-8C652.

Model 25 (3C1-3C638):

• 1931 3C1-3C268;
• 1932 3C269-3C450;
• 1933 3C451-3C638.

• 1C2 was delivered on September 14, 1931;
• 1C1 was delivered on November 7, 1931;
• 1C3 was delivered on November 7, 1931;
• 1C12 ("Old Tusko") was delivered on February 29, 1932.

1C1 through 1C14 were manufactured in 1931, and 1C15 through 1C157 were produced in 1932. Most of the early models in 1931 had SIXTY cast on the radiator sides, but a couple had the word DIESEL. This happened sporadically in the early part of the 1932, before the DIESEL nomenclature became the only casting made.