cl 500 valve block refurbishment

[fourcandles]

Hi just reading from a supplier of seal kits for valve block that there are two is this correct ?as you know from my post on leaking abc pump i am fitting a new pump .As the fluid is black i an thinking of refurbishing the block or blocks do i need two kits?
kind regards Dominic

 

[LostKiwi]

There is a front block and a rear block. If you're going to do it do both. As for the kit ask the supplier or better yet ask @Craiglxviii as he put together a kit using aerospace quality seals.