Big Yellow's numbers are below expectations in the second quarter of 2013.
Caterpillar's sales and revenues were $14.6 billion.
That's down from $17.3 at the same time last year.
Profit per share was a $1.45 - That's also down from the second quarter of last year, when it was $2.54.
Overall profit was also down from $1.7 billion to $960 million.
Caterpillar revised its 2013 outlook to a profit-per-share of $6.50, down 50 cents from previous estimates.