We have a John Crane dual seal in our WRV204, that unfortunately I am unable to get drawings for. Evidently John Crane US and John Crane Europe do not talk with one another. Does anyone have a drawing of the mechanical seal set up for this unit. The only drawing I have referencing the seal states that the primary/inner seal is a Crane 2 5/8" Type 8B1, and the secondary/outer is a Crane 2 1/4" type 28SC (Dry Running). Iím trying to find replacement parts for the seal here in the US, but I do not have a parts list or drawing to provide John Crane. We are running refrigerant grade propane and LuLube 100 in the units.