___Reparaturanleitung PS-4600 / PS-5000 23Repair manual DCS3500 / DCS3501 / DCS4300 / DCS4301 / EA3500F / EA3501F / EA4300F / EA4301F / MEA3500L / MEA3500M / MEA4300G / MEA4300LVacuum testing ventilation valve 6Attach the over/underpressure pump asdescribed.Close off the installation opening of the air valvewith your thumb (dampen it slightly).Set up a negative pressure of max 0.5 bar.This negative pressure must not change as longas the opening is sealed. When you take yourthumb off the air valve, the negative pressuremust quickly return to normal.PartsTo remove the suction head 7 pull it through thetank opening with a hooked wire.Note: Do not use pliers,as this may damage theline. Do not pull on the suction head or fuel line,as this can pull off the fuel nipple inside thetank.Fuel lines 5 can be pulled off the fuel nipple.Fuel line length:Return L = 118 mm (dia. 2.5/5.5)Supply L = 93 mm (dia 5.5 / 3)Carefully lever out fuel nipple 8 with a sharpflat-bladed screwdriver.Note: Do not lever against the line connections,as this can break them off.Lever off ventilation valve 6 with a smallscrewdriver.586710 TANKRemovalTo remove the tank, first remove the hood (seechap. 07), the starter housing (see chap. 06)and the vibration damper.Before separating the engine unit and the tank,the lateral fastening screws on the front grip willhave to be unscrewed.Pressure testAttach the over/underpressure pump (chap. 00pos. 13) to one of the two fuel lines 5 . Seal offthe second line.Set up a pressure of max. 0.3 bar.If the pressure drops off, check the following:• Air valve• Bothe fuel lines• Fuel nipple• Tank cap seal• Check tank for holesNote: Detergent can be used to localise leaks.