STRUCTURE AND FUNCTION HYDRAULIC PUMP SUCTION SAFETY VALVE 5 4 2 3 RKS00110 1 3 1. Charge pump 2. Charge safety valve 3. Suction safety valve 3A. Valve 3B. Rod 3C. Sleeve 3D. Spring 3E. Spring 3F. Plug 4. Piston pump 5. Travel motor 3A 3B 3C 3D 3F 3E RKS00090 FUNCTION There are two suction safety valves installed to each HST pump, and they have the following functions: 1) High pressure safety valve The valve restricts the maximum pressure inside the HST circuit in order to protect the HST circuit. 2) Suction safety valve The valve ensures the flow of the charge oil to the closed HST circuit and prevents the charge oil from flowing into the pump high pressure side (delivery side).
10-21 SK818-5 SK820-5 turbo