If the residual air in cylinder is impacted by abrupt clamp pressure the seal ring will be damaged due to the effect of diesel oil.
如果油缸内残留空气受急剧夹压时，那么，由于液压油的作用，有可能使密封圈烧损。
2
Cartridge type air and oil seals-sealair is injected into the oilseal and is vented to atmosphere between the seals.
套筒式气封和油封总成，油封之间通密封空气， 油封与气封之间有一通大气的腔室。
3
Avoiding the possible counter rotation of the oil pump while starting the machine, otherwise it may lead to the out blown of the axle seal and entering of air.