DETAILS. Powerscreen Chieftain 1700 two deck screen for sale. Powerscreen 1700 Chieftain, two (2) deck screen. The two bearing inclined screen deck measures 16''x5'' / 4.8m x 1.5m with. DETAILS. Finlay 694 three deck screen for sale. We can offer Finlay 694 three deck screen The machine has three screen decks with the top measuring 20ft x.