Hydraulic tramp release held to ISO 4406 cleanliness
Closed-center pumps meter oil between CSS adjustment and tramp-release cylinders so a cone can clear uncrushables without stalling the feeder. Factory flush logs travel with the machine, and dealers sample return-line oil at 250 hours so particle counts stay inside ISO 4406 18/16/13 before valve spools stick on dusty quarry pads.