jbofky
Member
I have a 1996 580SL. All of the hydraulics seem a little weak but get slightly worse when hot. Also when you swing the boom either direction, it bogs the engine. But if you open the swing valve all the way up, it frees the engine. I had the swing cylinders rebuilt and all of the valves o-ringed and checked out. The guy said he couldn't see a problem in the valve. Luckily all this needed to be done anyway because it acts exactly the same as it did before I "fixed" it. I've talked to some pretty good mechanics but everybody seems to be stumped. I'd really appreciate any suggestions.