Cart All manuals are sold in downloadable PDF format only. Remove item Thumbnail image Product Price Quantity Subtotal × Case IH Optum 270, 300 Tractor Service Manual $124.50 Case IH Optum 270, 300 Tractor Service Manual quantity $124.50 Coupon: Apply coupon Update cart Cart totals Subtotal $124.50 Total $124.50 Proceed to checkout Apply coupon