Goldman Sachs analyst Jerry Revich downgraded KBR (KBR) to Sell from Neutral saying the company's medium-term earnings growth outlook is challenged by "significant cuts" to large scale energy projects. Revich keeps a $19 price target for the shares. The engineering, procurement, construction and services company closed Friday down 12c to $19.45. The analyst also reiterated his cautious view on the Machinery and Engineering & Construction space. He cut his estimates for Neutral-rated Caterpillar (CAT) and Sell-rated Joy Global (JOY). Revich dropped his price target for Caterpillar to $67 from $72 and for Joy Global to $8 from $14. The stocks closed Friday at $69.97 and $12.80, respectively.