Craftsman Diehard 18hp 44" deck model 944.603280 / 0322939S
Bought this unit with snowblower, snow blade and mower deck. I took the snow blade off but having trouble mounting the mower deck. I think I'm missing some mounting pieces.
In the first picture I would say you are missing the lift links which would go from the inward facing pin on the deck up to the inward facing pin on the side of the frame, and the tie rod end things go bolt to those which would raise and lower the deck.
In the second picture you are missing the either the rods that go from the part hanging down in front of the deck to the holes on the front of the deck. or it may be plate that does the same thing.