Purchased a Model 305 Bush Hog years ago along with a 135MF tractor. Recently, the lower shaft on the bush hog broke. I was told I needed to purchase a lower shaft kit for the Model 305. I assumed the kit would include seals, bearings, etc. to repair the bush hog. When the "kit" arrived it included only the shaft, two (2) nuts and one (1) lock washer. What else do I need to buy to complete this repair?