When the machine running, if dirt clogged pores balancing valve, leading to the parking brake can not be released, resulting in walking deviation. Because the machine is running variable pump repair call., If not through the oil pressure balance valve orifice into the balancing valve spring chamber to promote balanced valve spool moves, the pressure balance valve oil can not pass through the slot on the access to its hydraulic system inside, leading to the parking brake force can not be lifted, the results can not rotate the motor running, so there walking deviation. Remedy; cleaning Valves; finishing variable pump disassembly to avoid dirt; replaced periodically to meet the requirements of hydraulic oil and filter. If you walk inside the main valve spring soft or broken, or the valve is stuck, are likely to cause lower oil pressure, appear to walk deviation. Check, walking the main valve to measure the oil pressure, normal if 32.5Mpa. If you walk the main valve is damaged, replace or repair. My unit PC200 excavator has twice appeared walk deviation, are due to damage caused by walking the main valve. Therefore variable pump monopoly., In the event of failure to walk deviation should first consider whether to walk the main valve is damaged, avoid detours. Variable pump Monopoly |. Variable pump | Hydraulic from Jinan Jing Jing Chong Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) strong, credible, in Jinan, Shandong mining machinery industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement to create innovative ideas will lead crystal hydraulic and you hand into the brilliant, for a better future!