I think yours is slightly unusual as it has a damper on both sides. It's an early version due to the solid axles and circlips holding it all together. I much prefer the symmetry of the double damper than the single one.
Servicing the damper is pretty simple, though best done with the correct tools to grip the damper in a vice via a split block with a 'hole' to clamp it. It unscrews and you can clean, replace o-rings and refill with fluid.
I might have some linkage axle spares in my stash. If you need a copy of the manual, I might have one, though I'd need to scan as it's paper.
Bushings may need replacing if there's any play, but hopefully yours is nice and tight.