The machinery cycle may be taking a turn for the worse, and one Wall Street analyst has adjusted his ratings on a handful of related stocks. Goldman Sachs analyst Jerry Revich has made the following changes to his outlook: Reiterated Buy rating for Caterpillar Inc. but lowered price target from $221 to $182 and removed stock from Conviction Buy List.Reiterated Buy rating for Deere & Company but lowered price target from $213 to $175 and removed stock from Conviction Buy List.Downgraded Manitowoc Company Inc from Neutral to Sell and lowered price target from $30 to $22.Downgraded Generac Holdings Inc. from Neutral to Sell and reiterated $45 price target.Source