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(1)动臂和转斗同时无力原因包括:油箱油量不足,造成吸空进气;进油软管老化开裂吸进空气,接头不牢进气;进油滤芯过脏,造成吸油不畅;工作泵损坏,内泄严重;操作阀上主安全阀调整不当或内泄严重;转斗缸与动臂缸同时内泄,转斗操作阀阀芯和动臂操作阀阀芯与阀孔配合间隙均过大。
(1) Boom and bucket at the same time weakness reasons include: insufficient fuel tank, resulting in suction air intake; cracking of the intake hose into the air cracking, the joint is not strong intake; inlet filter is too dirty, resulting in poor suction ; Work pump damage, serious internal leakage; main valve on the operation of the valve to adjust the valve improperly adjusted or serious discharge; rotary cylinder and boom cylinder at the same time internal leakage, the bucket valve and the boom operation valve spool and valve hole with Gaps are too large.