Hi all. Took my truggy out after a year. Ive had it since 4-5 years at least, got the initial et48 version so not sure when that was released. Anyway, it still runs amazing however i realize that it has lost ride height. I have never serviced its shocks before, and don't exactly know what all I have to do in order to give the suspension a complete overhaul and make it so like it was functioning when I first built the kit. Can someone guide me as to what my process should be? What all do I need to service? Do i need to replace any items? (no damage has been incurred).

I am attaching a picture to give you an idea how its drooping further than necessary.