20V4A-1B22R

20V2A   叶片泵
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20V3A
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20V4A
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20V5A
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20V6A
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20V7A
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20V8A 
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20V9A
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20V10A 
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20V11A
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20V12A 
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20V14A
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25V10A
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25V12A 
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25V14A
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25V15A
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25V17A
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25V19A
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25V21A 
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35V21A
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35V25A
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35V30A
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35V32A 
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35V35A
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35V38A
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45V42A
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45V45A
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45V50A 
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45V57A 
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45V60A
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45V66A 
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45V76A 
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2520V双联    
3525V双联
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4535V双联
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 45V42A-86A22R
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 45V76A-86A22R
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45V76A-86D22R
正确清洗液压系统。清洗液较好采用系统用过、牌号相同的液压油。切忌使用煤油或柴油作清洗液。清洗时应采用尽可能大的流量，使管路中的液流呈紊流状态，并完成各个执行元件的动作，以便将污染物从各个泵、闹与液压缸等元件中冲洗出来。清洗结束后，在热状态下排掉清洗液，按更换油的方法加人新的工作油液。 
 防止油温过高         
  液压系统的温度，根据实验，一般在35t～60℃范围内较为合适，较高应不**过80℃。在正常的油温下，液压油各种性能良好。油温过高会使液压系统产生很多不良影响，如粘度下降，润滑油膜变薄并易被损坏，润滑性能变差，容积效率低，机械磨损加剧，橡胶密封圈加速老化，密封性能随之降低等。因此在使用中，应控制系统油温保持在正常范围。
为此，应做到以下几点：
（1）保持油箱中的正常油量，使系统有足够的油液进行循环冷却。 
（2）在执行机构不工作时，应及时使系统卸荷。 
（3）经常清洗冷却装置，使其保持良好的工作状态。 
（4）根据工作环境温度，选用合适粘度的液压油：周围环境温度高，应选用高粘度油，周围环境温度低，应选用低粘度油。在一般环境温度下，齿轮泵宜选用50℃时18～38pf／s的油。 
（5）气温较高时，机械不可连续运转时间过长，通常在气温**30℃的条件下，机械连续作业时间不得**过4h。 
（6）当气温低于10℃以下时，应使系统在无负荷状态下运转约20min，使油温升到规定值。 
 防止液压系统进入空气