Hydraulic Cylinder Tools, Excavator Hydraulic Parts manufacturer / supplier in China, offering for Cat E311 E312 E313 E315 E318c Excavator Hydraulic Pump 244-5326 2445326 162-6327 Main Pump, Excavator Main Hydraulic Control Valve 31qb-17100 31qb-16110 31qb-17200 for R500-9 R485 R480 R455-7 R520-7-9 Distribution Valve, Excavator Water Pump 178-6633 125-2989 296-4655 Fits C6.4 C4.2 3066 3064 Diesel Engine for Cat311 320c E320d and so on.