20V4A-1A22R

定期检查液压油质量，保持液压油的清洁。在检查液压油质量时，主要检查以下三个方面的内容：①液压油的氧化程度液压油在使用中，由于温度的变化，空气中氧及太阳光的作用，将会逐渐被氧化，使其粘度等性能改变。氧化的程度，通常从液压油的颜色、气味上判断。如果液压油的颜色呈黑褐色，并有恶臭味说明已被氧化。褐色越深，恶臭味越浓，则说明被氧化的程度越厉害。此时，应更换新油。②液压油中含水分的程度液压油中如果混人水分，将会降低其润滑性能，腐蚀金属。判断液压油中混入水分的程度，通常有两种方法，一是根据其颜色和气味的变化情况，如液压油的颜色呈乳白色，气味没变，则说明混人水分过多。二是取少量液压油滴在灼热的铁板上，如果发出“叭叭”的声音，则说明含有水份。此时，应更换新油。③液压油中含有杂质的情况在机械工作一段时间后，取数滴液压油放在手上，用手指捻一下，察看是否有金属颗粒，或在太阳光下观察是否有微小的闪光点。如果有较多的金属颗粒或闪光点，则证明液压油含**械杂质较多。这时，应更换液压油，或将液压油放出，进行不少于42h以上时间的沉淀，然后再将其过滤后使用。 
20V2A   叶片泵
20V2A-1A22R
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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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45V66A-86C22R
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 45V76A-86A22R
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45V76A-86D22R
更换液压油时，注意应在机械刚工作完毕，趁液压油热的时候放出（以便容易把机械杂质、油污等带出）。具体办法是：操纵工作装置使其置于较高位置，关闭发动机，利用其自重下降，使油缸彻底排油，然后彻底清洗油箱及相应管路，加人新的液压油。