Hey, Just a little update. With this Hydrovac being so old I never thought I could walk into my Local FLAPS and get one, so yesterday I gave it a try and the guy says there's 3 in the warehouse and it will be out here today.
Mine still had the brass tag on it {37400 } which helped locate the correct one in the parts book.
If the kit is $100, then I chose to spend another $140 and have one ready to go in my hand,especially after seeing the condition of the inside of my old one when I removed the fittings.
I wish some other parts for a 52 2ton were this ease to get.
Dan