I am the proud new owner of a rather old a SJlll-3219 shipped 2014 This machine is not a "MC". There were no check on this machine before it showed up already paid for. I called in the local service company that we bought it from along with a few other complaints , the brake sluggishness was quickly diagnosed as a bad brake piston (which they gladly replaced). the problem hasn't gone but the tech said the machine was working fine. I am experienced with reading Hydro and electric prints and am using the correct service manual. When operating from start the brake piston moves as soon as the hydro motor engages but is so slow that I can't drive in the slow speed. Slow speed does engage when I am raised on the platform. I checked by removal diodes d15 and D16 they both are good. Checked the connections to the brake sol coil and is getting. Wanting to check if the brake orifice is blocked, need to know it's location/ in the brake line? The rest of the machine seems to function properly. Any help would be appreciated.