English 5.906-591.0 Rev. 00 (01/14) 17 DangerPrior to all work on the appliance, switch off the applianceand pull the power plug.* The control valve switches off the electric motor bymeans of the pressure surge that is created when closingthe hand spray gun. Subsequently, the control valve ef-fects a pressure reduction to 30...40 bar. In this way, thepump and accessories are protected and the force foropening the hand spray gun is reduced. For pumps thatare equipped with this control valve, the pressure cannotbe regulated on the hand spray gun (Servopress).AE Service group pump010 Safety information020 Overview1 Valve detergent2 Suctioning of detergent3 Control valve, complete *4 Control boring5 O-ring, low-pressure range/high-pressure range6 Seals control piston7 O-ring, oil8 Piston spring9 Spring plate10 Piston, with drip edge11 Oil seal piston guide12 Piston guide13 Spacer14 High-pressure seal with support washer15 Cylinder head16 Valve gear casing17 Suction valve, caulked18 O-ring, valve gear casing19 Pressure valve20 Pressure holding valve21 Injector nozzle030 Function