（二）液壓件可修理內容與方法
液壓元件使用到一定程度，由於零件磨損或疲勞或密封件老化失效，技術指標已達不到使用要求，但還未到達完全不能用的程度就應該進行修理。如果繼續使用下去，不僅使系統工作不可靠，且會造成無法修復的後果。修理各種液壓件時，對相互配合的零件應使其達到要求的配合間隙。常用液壓件修理的配合間隙見表3-3（供修理用）。
1 液壓泵或液壓馬達可修理內容與方法HED1KA4X/100SO5
HED1KA4X/100K
HED1KA4X/100K6
HED1KA4X/100KL220
HED1KA4X/100KL24
HED1KA4X/350
HED1KA4X/350K
HED1KA4X/350K14SO7
HED1KA4X/350K6L24
HED1KA4X/350KL220
HED1KA4X/350KL24
HED1KA4X/350KL48
HED1KA4X/350L110
HED1KA4X/350L220
HED1KA4X/350L24
HED1KA4X/500
HED1KA4X/500K
HED1OA4X/100K6
HED1OA4X/100
HED1OA4X/100J
HED1OA4X/100K
HED1OA4X/100K14SO7
HED1OA4X/100K6L24
HED1OA4X/100KL220
HED1OA4X/100KL24
HED1OA4X/100L220
HED1OA4X/100L24
HED1OA4X/100L24V
HED1OA4X/100V
HED1OA4X/350
HED1OA4X/350K
HED1OA4X/350K14SO7
HED1OA4X/350K6L220
HED1OA4X/350K6L24
HED1OA4X/350KL24
HED1OA4X/350KL48
HED1OA4X/350L220
HED1OA4X/350L24
HED1OA4X/50
（1）齒輪泵或齒輪馬達
1）齒輪兩側麵與配油盤或泵蓋之間磨損後，其配合間隙比產品圖紙規定值增大在30%左右。可用研磨的方法進行修復。
2）軸用旋轉油封件或其它密封件失效，喪失密封性時，應當更換密封件，並對密封件質量精心檢查。安裝時要註意唇口方向，且不要損壞密封唇口。
3）泵或馬達的容積效率比規定值降低在10~15%時，如果繼續使用下去，不僅降低整個系統的效率，而且還會造成無法修理的後果。因此必須進行檢修。4WEH16L7X/6EG24N9ETK4
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LFA50DRW2-7X/210
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LFA50WEA-7X/A18P18T18
LC16A10D/7X
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Z2DB6VD2-4X/200
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2FRM6B76-33/32QMV
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DBDS20K1X/200
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ZDB10VA2-4X/315V
4WE6HB6X/EG24N9K4
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LC50AOOE7X/
4WH6E5X/
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4WRZE16W6-150-71/6EG24N9ETK31/F1D3M
4WRZ32W6-520-71/6EG24N9EK4/M
4WE10C3X/CG24N9K4
4WRPH10C3B100L-2X/G24Z4/M 0811404059
DR30G5-5X/200YM
DBW10B2-5X/315-6EG24N9K4
3DREPE6C-2X/25EG24N9K31/F1M
3DREPE6C-2X/25EG24N9K31/A1M
3DREP6C-2X/25EG24N9K31/M
4WEH16K7X/6EG24N9ETK4/B10
DR10-5-5X/100YM
DR10-5-5X/315Y
ZDR6DA2-5X/75Y
DZ6DP2-5X/75M
Z2DB10VD1-4X/315
DBETE-6X/315YG24K31A1V
DBDS20K1X/315
Z2S10-2-3X
Z2S6-2-6X
4WREE6E32-2X/G24K31/A1V
4WEH22J72/6EG24N9ETSK4/B10
4WEH16J72/6EG24N9ETK4
4WE6EA6X/EG24N9K4
Z1S10T1-3X/V
Z2S6B1-6X
（2）葉片泵或葉片馬達
1）定子圈內表麵有異常磨損或有條痕存在，會造成壓力波動和產生噪聲。因此，必須對定子圈內表麵在專用磨床上進行修磨。如果定子圈內表麵磨損不嚴重可用油石修磨，使內表麵光滑。對不能修復者應更換。
2）配油盤有條狀劃痕等缺陷時，可用研磨的方法進行修復。
3）個別葉片磨損、膠粘、折斷，應清洗或更換葉片。0811404061
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0811 020 040
0811401224
0811001020
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0811403001
0811 32O 017
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0811 160 170
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0811 160 170
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4WRPEH6C3B04L-2X/G24K0/A1M 0811404600
4WRPEH6C3B12L–2X/G24K0/A1M 0811404601
4WRPEH6C3B24L–2X/G24K0/A1M 0811404602
4WRPEH6C3B40L–2X/G24K0/A1M 0811404603
4WRPEH6C5B40L–2X/G24K0/A1M 0811404746
4WRPEH6C3B15P–2X/G24K0/A1M 0811404642
4WRPEH6C3B25P–2X/G24K0/A1M 0811404643
4WRPEH6C3B40P–2X/G24K0/A1M 0811404644
4WRPEH6C5B40P–2X/G24K0/A1M 0811404648
4WRPEH6C3B04L–2X/G24K0/F1M 0811404631
4WRPEH6C3B12L–2X/G24K0/F1M 0811404632
4WRPEH6C3B24L–2X/G24K0/F1M 0811404633
4WRPEH6C3B40L–2X/G24K0/F1M 0811404634
4WRPEH6C5B40L–2X/G24K0/F1M 0811404749
4WRPEH6C4B02L–2X/G24K0/A1M 0811404641
4WRPEH6C4B04L–2X/G24K0/A1M 0811404610
4WRPEH6C4B12L–2X/G24K0/A1M 0811404611
4WRPEH6C4B24L–2X/G24K0/A1M 0811404612
4WRPEH6C4B40L–2X/G24K0/A1M 0811404613
4WRPEH6C1B40L–2X/G24K0/A1M 0811404738
4WRPEH6C4B15P–2X/G24K0/A1M 0811404645
4WRPEH6C4B25P–2X/G24K0/A1M 0811404646
4WRPEH6C4B40P–2X/G24K0/A1M 0811404647
4WRPEH6C1B40P–2X/G24K0/A1M 0811404649
4WRPEH6C4B04L–2X/G24K0/F1M 0811404350
4WRPEH6C4B12L–2X/G24K0/F1M 0811404351
4WRPEH6C4B24L–2X/G24K0/F1M 0811404352
4WRPEH6C4B40L–2X/G24K0/F1M 0811404353
4WRPEH6C1B40L–2X/G24K0/F1M 0811404354
4WRPEH6CB04L–2X/G24K0/A1M 0811404741
4WRPEH6CB24L–2X/G24K0/A1M 0811404355
4WRPEH6CB40L–2X/G24K0/A1M 0811404639
4WRPEH6CB40L–2X/G24K0/F1M 0811404640
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4）轉子端麵有劃痕或磨損點或金屬膠合，須進行修磨，同時要對葉片寬度和定子圈厚度作相應的修磨，使轉子、葉片、定子圈三者的配合間隙達到表3-3中的規定值。
表3-3 常用液壓元件的配合間隙（供修理用） mm
液壓元件名稱與部位 配合間隙
中低壓齒輪泵：齒頂圓與殼體內孔軸向間隙 0.05~0.10
0.04~0.08
中高低齒輪泵：齒頂圓與殼體內孔軸向間隙 0.05~0.10
0.03~0.05
中低壓葉片泵：葉片與轉子槽
葉片與配油盤溢流閥是一種液壓壓力控製閥。在液壓設備中主要起定壓溢流作用，穩壓，系統卸荷和安全保護作用。 定壓溢流作用：在定量泵節流調節系統中，定量泵提供的是恒定流量。當系統壓力增大時，會使流量需求減小。此時溢流閥開啟，使多餘流量溢回油箱，保證溢流閥進口伏羲 三皇之一的天皇，是洪涯境內眾神之首。製定瞭許多天規，希望世間一切遵循秩序和規則循環往復。女媧 三皇之一的地皇，天性博愛仁慈，以自己的方式理解人類的生存，並給予人族一些幫助。神農 三皇之一的人皇，性喜遊歷神州，行蹤不定，對萬物抱著任其自由發展之心。壓力，即泵出口壓力恒定（閥口常隨壓力波動開啟）。
穩壓作用：溢流閥串聯在回油路上，溢流閥產生背壓運動部件平穩性增加。
系統卸荷作用：在溢流閥的遙控口串接溢小流量的電磁閥，當電磁鐵通電時，溢流閥的遙控口通油箱，此時液壓泵卸荷。溢流閥此時作為卸荷閥使用。
安全保護作用：系統正常工作時，閥門關閉。隻有負載超過規定的極限（系統壓力超過調定壓力）時開啟溢流，進行過載保護，使系統壓力不再增加（通常使溢流閥的調定壓力比系統最高工作壓力高10%～20%）。
實際應用中一般有：作卸荷閥用，作遠程調壓閥，作高低壓多級控製閥，作順序閥，用於產生背壓（串在回油路上）。
溢流閥一般有兩種結構：1、直動型溢流閥 。2、先導型溢流閥。
對溢流閥的主要要求：調壓范圍大，調壓偏差小，壓力振擺小，動作靈敏，過載能力大，噪聲小。
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