There should be an accumulator already installed in series connection with the lift hydraulics. Intent is to cushion pressure surges when machine drops into those big ol' badger holes an d the table wants to "leave the machine". With the draper hydraulic drive you may have to improve the hydraulic pump and cooling arrangement as the original hydraulics allowed for hydraulic drive on reels or pickup only, adding the draper drive will cause overheating. Check with Charlie Smith at Combine World in Allen, Sask, he has most of the answers on this stuff.