STRUCTURE AND FUNCTION HYDRAULIC PUMP ANTI ENGINE-STALL CONTROL VALVE (AS VALVE) 4 3 2 5 E 1A 1B 1C 1F 1D 1E 1G 1H 1L RKS00170 1. AS valve 1A. Nut 1B. Screw 1C. Spring 1D. Spring 1E. Spring 1F. Valve 1G. Valve 1H. Nut 1L. Screw 2. Charge pump 3. Orifice 4. Charge safety valve 5. Engine FUNCTION The AS valve is attached on the main piston pump. It reduces pressure for pump swash plate control from charge circuit. The AS valve outputs pressure correspond with en- gine revolution. 10-29 SK818-5 SK820-5 turbo