Grease fittings ? yokesleeves equipped with grease fittings to minimize wear and operating torque 润滑油附件-轭架套管配置润滑油附件，降低磨损和操作扭矩。
3.
Hydraulic grease fitting : hydraulic grease fitting provides for lubrication of yoke sleeve bearing surfaces ( not shown ) 液压润滑油注入器：液压润滑油注入器为轭架套管轴承表面提供润滑(没有图示) 。
4.
Insert ball bearing units with cast iron housings are all relubricable types equipped with grease fittings to secure full performance and longer service lift of the units under any operating conditions 带铸铁外球面球轴承都带有油嘴，可重新润滑，保证在任何工作环境下具有完美的性能及长的使用寿命。
