力士樂螺紋插裝閥電磁驅動閥OD150117A000000 R930062337，德國REXROTH螺紋插裝閥電磁驅動閥，購買進口液壓、氣動、自動化控制工業配件，
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電磁換向閥在液壓系統中的作用是用來實現液壓油路的換向、順序動作及卸荷等。由于電磁鐵的推力有限，電磁換向閥應用在流量不大的液壓系統中。
電磁換向閥是液壓控制系統和電氣控制系統之轉換元件。它由液壓機械中的按鈕開關、限位開關、行程開關、壓力繼電器等電氣元件發出信號，使電磁鐵通電吸合或斷電釋放，從而直接控制閥芯移位，來實現油流的溝通、切斷和方向變換，來操縱各執行機構的動作。推動故障檢查按鈕可使滑閥閥芯手推移動。
工程機械行走制動系統必須保證在惡劣條件下仍具有良好的制動性能，并要求操縱輕便和高可靠性。目前大多數工程機械的制動系統采用氣頂油的
結構型式，以實現車輛的高壓制動效能。近年來，國外工程機械出現采用全液壓制動的方式，其主要.優點是系統的制動壓力高，產生的制動力矩大，制動靈敏，且液壓管路為全封閉的回路，污染性也很小。
液壓制動系統一般由制動傳動裝置和制動執行元件兩部分組成。前者將制動踏板控制的動力源傳遞給制動執行元件;后者是裝在車輪上的制動器，它將傳動裝置傳來的動力變成摩擦力矩。
雙回路液壓制動系統原理，該系統中的雙路蓄能器充液閥控制蓄能器的充油量和壓力。蓄能器的充油量和高制動壓力則根據制動器的用油量、制動力和緊急制動的次數來決定。充液閥的流量和壓力預設一上限值，當蓄能器的壓力達到該值時，充液閥使系統中的一少部分油回流，給蓄能器充壓，蓄能器的壓力達到設定值時，液壓泵卸荷。系統中的充液閥同時給兩個蓄能器供油，當油泵出現故障時，兩個蓄能器分別給兩個回路的制動器供油，既同時工作又互不影響。另外，系統中設置的低壓開關可以隨時提醒駕駛員，當蓄能器的壓力連續下降，并低于報警開關的預定值時，應檢查液壓制動系統，注意安全。
液壓制動系統設計
首先，根據車重、速度、路況等條件，估算工程機械行走制動所需的制動力矩;其次，初步選擇系統壓力，并據此確定制動盤的直徑、制動鉗的尺寸等參數。制動盤的直徑在能夠安裝的大空間前提下確定，整車的制動力矩是每個制動器產生的制動力矩之和，而每個制動器上產生的力矩都取決于系統壓力、制動缸活塞的尺寸和數量、制動鉗的尺寸、制動鉗與制動盤之間的摩擦系數等。
根據制動缸的行程和截面積，計算出單側制動缸所需的油液體積。考慮到在實際使用中，制動器逐漸磨損，為確保安全，應以磨損后的舊制動器進行計算;然后，求得前、后橋制動1次所需的油液總體積:后，按照設計要求，當制動泵不工作時，蓄能器至少應該能夠完成緊急制動次數不少于4~5次，將剛得到的油液總.體積擴大5倍，液壓泵排量的確定液壓泵的排量根據蓄能器的充液時間來確定。為了安全，蓄能器的充液時間長不能超過20s。已知蓄能器無油狀態時的容積為V，充滿油液時的容積為V3，且蓄能器的工作過程為絕熱過程,滿足P，Vi=P3 V3， 則一個蓄能器的體積變化量0V= V1- V3。根據系統中蓄能器數量，可求得需要油液的總體積，再根據充液時間，計算出系統流量。又因為發動機的轉速是變化的，所以在計算泵的排量時，應該按照發動機在怠速時的轉速來考慮，再考慮到泵的容積效率為85%，計算泵的排量q,據此選擇合適的制動泵。
目前液壓行走系統僅用于低速行駛的工程機械，其作業裝備也以液壓傳動為主，主要是利用了液壓元件布置的獨立性。但其不適合應用于批量生產的小
轎車以及高速車輛，原因是效率低，油耗高，而且液壓元件的生產批量也無法與小轎車相比。
在國外，HST應用于工程機械行走系統的發展十分迅猛，德國、美國、日本等國家無論在基礎理論研究還是應用技術研究方面都處于領先地位且擁有世界上的液壓元件制造公司和主機制造廠。國外新開發的小型裝載機已100%采用HST,并有向大型裝載機發展的趨勢，如利勃海爾L551裝載機;德國林德公司液壓驅動叉車在柴油機上加裝了電子調速器，實現了整車系統管理;美國薩澳公司的NFPE控制以及德國力士樂公司的DA控制可以實現發動機與液壓行走系統的自動聯合控制。
在我國，HST在這- -領域的發展也十分迅速，但還面臨著一系列問題: 國內液壓元件質量差，而國外的液壓元件價格又太高，會造成總成本過高;國內技術人員和維修人員對液壓傳動裝置的控制系統還缺乏了解和掌握;靜液壓系統和發動機的匹配觀念不強等。
液壓傳動系統的優點和存在的問題
1.優點:
(1)液壓傳動功率密度高，調速性能好，可實現無級調速；
(2)在發動機轉速范圍內，較低轉速時能保持較大的牽引力,起動力矩大；
(3)總體匹配容易，只需改變泵或馬達排量就可以得到滿意的匹配效果；
(4)液壓傳動元件位置獨立，布置方便靈活；
(5)行走微動性能好，本身具有制動效果；
(6)控制性能好，可實現恒轉矩或恒功率調速；
(7)吸振性好,同時具有過載保護裝置；
(8)便于實現自動及遠距離操縱，操作簡單方便。
2.存在問題:
制造加工要求高;未實現國產化，生產批量較小;成本高。
各種行走傳動系統比較
工程機械行走系統初主要采用機械傳動和液力傳動(全液壓挖掘機除外)。現在，液壓和電傳動也出現在工程機械行走驅動裝置中，對這一-領域起到了巨大的推動作用。
機械傳動
結構簡單、工作可靠、成本低、穩態傳動效率高并可利用柴油機運動零件的慣性進行作業。但一般只能進行有級變速，并且布局方式受到限制，司機勞
動強度高。因此，機械傳動適用于行駛阻力比較穩定的連續作業機械。
2.液力傳動
具有分段無級調速能力;輸出軸和輸入軸之間沒有剛性的機械聯系，減小了傳動系及發動機零件的沖擊、振動;變矩器的功率密度大而負荷應力較低;成本不高。這些特點使它廣泛應用于大中型鏟士、起重、運輸等工程機械中。但與液壓傳動相比，液力傳動存在很多缺點:
(1)加速性能較差，不能利用發動機制動；
(2)液力傳動缺乏固定速比，不能準確調速；
(3)起動力矩小，低速傳動效率低；
(4)液壓傳動的高效區比液力傳動高效區范圍廣；
(5)變矩器不能反轉，倒檔需采用機械傳動，會引起換擋時的動力中斷；
(6)布局受限。
力士樂螺紋插裝閥電磁驅動閥OD150117A000000 R930062337
力士樂REXROTH行走機械液壓-緊湊型液壓系統-插裝閥-機械插裝閥-螺紋插裝閥-電磁驅動閥
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R930073310 OD150618C0HOC00-VEI-016-NO-08A-C-06-0HOC
R930073313 OD150676A0HOC10-VEI-016-NO-10A-A-06-0HOC
R930073314 OD150121A8HOC00-VEI-S16-NC-16G-A-01-0HOC
R930073342 OD150618A0HOC00-VEI-016-NO-08A-A-06-0HOC
R930073441 OD150436A0HOC00-VEI-016-NO-10A-A-04-0HOC
R930073770 OD153318D100000-VEI-016-NC-08A-D-33-0000
R930073920 OD150518A000030-VEI-016-NC-08A-A-05-0000
R930075659 OD151117A000010-VEI-016-NC-12G-A-11-0000
R930076093 OD150121DP00000-VEI-016-NC-16G-D-01-P000
R930076177 OD150518A0000I0-VEI-I016-NC-08A-A05-0000
R930076178 OD150118A0000I0-VEI-I016-NC-08A-A01-0000
R930076179 OD150518D0000I0-VEI-I016-NC-08A-D05-0000
R930076180 OD150618A0000I0-VEI-I016-NO-08A-A06-0000
R930076181 OD150618B0000I0-VEI-I016-NO-08A-B06-0000
R930076182 OD150518A8000I0-VEI-IS16-NC-08A-A05-0000
R930076206 OD151017A000000-VEI-016-NO-12G-A-10-0000
R930076233 OD150518AS00000-VEI-016-NC-08A-A-05-0000
R930076464 OD C1-VEI7A2T14.M75K31.75NCL6&
R930076579 OD150636GP00000-VEI-016-NO-10A-G-06-P000
R930076729 OD153136DV00000-VEI-016-NC-10A-D-31-V000
R930076887 OD150118A0000L0-VEI-L016-NC-08A-A01-0000
R930076888 OD150518A0000L0-VEI-L016-NC-08A-A05-0000
R930076992 OD150118D0000L0-VEI-L016-NC-08A-D01-0000
R930076993 OD150718D0000L0-VEI-L016-NC-08A-D07-0000
R930077108 OD151018CP00000-VEI-016-NO-08A-C-10-P000
R930077397 OD150718D0AOC00-VEI-016-NC-08A-D-07-0AOC
R930078192 OD150239A000000-VEI-016-NO-08F-A-02-0000
R930078218 OD153218AP00000-VEI-016-NO-08A-A-32-P000
R930078322 OD150518E0000T0-VEI-T016-NC-08A-E-05-00&
R930078395 OD150336E000000-VEI-016-NC-10A-E-03-0000
R930078445 OD153218AV00000-VEI-016-NO-08A-A-32-V000
R930078704 OD150418A0HOC00-VEI-016-NO-08A-A-04-0HO
R930078848 OD150518A0AOC01-VEI-016-NC-08A-A-05-0AOC
R930079171 OD150589AV00000-VEI-016-NC-12A-A-05-V000
R930079399 OD153289A0DOC00-VEI-016-NO-12A-A-32-0DOC
R930079400 OD151121A0DOC00-VEI-016-NC-16G-A-11-0DOC
R930079401 OD153136A0DOC00-VEI-016-NC-10A-A-31-0DOC
R930080149 OD150221AV00000-VEI-016-NO-16G-A-02-V000
R930080150 OD150418AV00000-VEI-016-NO-08A-A-04-V000
R934000104 OD1531183AS800-VEI8A2T06.M18K31.3ANCC21&
R934000107 OD1531183DS800-VEI8A2T06.M18K31.3DNCC21&
R934000679 OD1501173DS000-VEI8A2A09.17K01.3DNCC222&
R934000693 OD1501183IS001 VEI8I2A06.18K01.3INCC218&
R934000704 OD1501193AS000-VEI8A2A06.19K01.3ANCC218&
R934000707 OD1501213AS800-VEI8A2A12M.21K01.3ANCC22&
R934000716 OD1501903IS000-VEI8I2A06.90K01.3INCC218&
R934000718 OD1502171AS000-VEI8A2A09.17K02.1ANAC220&
R934000721 OD1502171BS000-VEI8A2A09.17K02.1BNAC220&
R934000733 OD1502181BS100 VEI8A2A06.18K02.1BNAC220&
R934000739 OD1502181IS001 VEI8I2A06.18K02.1ISNAC21&
R934000747 OD1502181MS100 VEI8I2A06.18K02.1MNAC218&
R934000758 OD1502211CS000-VEI8A2A12.21K02.1CNAC225&
R934000759 OD150221540000-VEI7A2A14.21K02.54NAL630&
R934000762 OD1502901IS000 VEI8I2A06.90K02.1INAC218S
R934000764 OD1503043AS000-VEI8A2B16.04K03.3ANCC218&
R934000766 OD1503043BS000 VEI8A2B16.04K03.3BNCC218S
R934000773 OD1503173AS800-VEI8A2B09M17K03.3ANCC222&
R934000775 OD1506891AS001-VEI8A2A12V89K06.1ANAC225&
R934000779 OD1503183AS000-VEI8A2B06.18K03.3ANCC218&
R934000781 OD1503183BS000 VEI8A2B06.18K03.3BNCC218S
R934000786 OD1503193DS000-VEI8A2B06.19K03.3DNCC218&
R934000787 OD1506891BS001-VEI8A2A12.V89K06.1BNAC22&
R934000792 OD1503213DS000-VEI8A2B12.21K03.3DNCC225&
R934000809 OD1504171CS000-VEI8A2B09.17K04.1CNAC220&
R934000820 OD1504211CS000-VEI8A2B12.21K04.1CNAC225&
R934000821 OD150421540000-VEI7A2B14.21K04.54NAL630&
R934000827 OD1504761AS000-VEI8A2B09.76K04.1ANAC220&
R934000831 OD1504891CS001-VEI8A2B12.V89K04.1CNAC22&
R934000842 OD1505173BS000 VEI8A2A09.17K05.3BNCC222S
R934000844 OD1505173CS100-VEI8A2A09.17K05.3CNCC222&
R934000846 OD1505173DS800-VEI8A2A09M17K05.3DNCC222&
R934000849 OD15051798OC00-VEI8A2A09.17K05.98NCAX18&
R934000850 OD15051798ON00 VEI8A2A09.17K05.98NCAX20S
R934000863 OD1505183A0000 VEI8A2A06.18K05.3ANCC218S
R934000865 OD1505183AS001-VEI8A2A06.18K05.-S8A/12D&
R934000868 OD1505183AS005-VEI8A2A06V18K05.3ANCC218&
R934000875 OD1505183CS003 VEI8A2A06S18K05+S8H/12DC
R934000877 OD1505183CS200-VEI8A2A06.18K05.3CNCC218&
R934000890 OD15051898OC00-VEI8A2A06.18K05.98NCAX18&
R934000893 OD150519310000 VEI8I2A06.19K05.31NCC218&
R934000895 OD1505193AS000 VEI8A2A06.19K05.3ANCC218&
R934000898 OD1505193DS000 VEI8A2A06.19K05.3DNCC218&
R934000902 OD1505213A0000 VEI8A2A12.21K05.3ANCC225S
R934000913 OD C VEI8A2A12M21K05.62NCC630S
R934000914 OD150521750000-VEI7A2A14.21K05.75NCL630&
R934000917 OD15052198OC00-VEI8A2A12.21K05.98NCAX26&
R934000953 OD1506171AS001-VEI8A2A09.17K06.1ANAC220&
R934000956 OD1506171CS000-VEI8A2A09.17K06.1CNAC220&
R934000958 OD15061796OC00-VEI8A2A09.17K06.96NAAX18&
R934000963 OD1506181A0000 VEI8A2A06.18K06.1ANAC218S
R934000969 OD1506181AS300-VEI8A2A06.18K06.1ANAC218&
R934000974 OD1506181BS100 VEI8A2A06.18K06.1BNAC218&
R934000977 OD1506181CS100-VEI8A2A06.18K06.1CNAC218&
R934000978 OD1506181CS200-VEI8A2A06.18K06.1CNAC218&
R934000982 OD1531893AS001-VEI8A2T12.V89K31.3ANCC22&
R934000985 OD15061896OC00-VEI8A2A06.18K06.96NAAX18&
R934000989 OD1506191AS000 VEI8A2A06.19K06.1ANAC218&
R934000991 OD1506191CS000-VEI8A2A06.19K06.1CNAC218&
R934000995 OD1506211A0000 VEI8A2A12.21K06.1ANAC225S
R934000998 OD1506211BS100-VEI8A2A12.21K06.1BNAC225&
R934001001 OD150621540000-VEI7A2A14.21K06.54NAL630&
R934001002 OD15062196OC00-VEI8A2A12.21K06.96NAAX26&
R934001004 OD1506361A0000 VEI8A2A09.36K06.1ANAC220S
R934001015 OD150676190100 VEI8A2A09.76K06.19NAC218S
R934001016 OD1506761AS001-VEI8A2A09.76K06.1ANAC218&
R934001018 OD1506761CS000-VEI8A2A09.76K06.1CNAC220&
R934001019 OD1506761CS100-VEI8A2A09.76K06.1CNAC218&
R934001038 OD1509173AS000-VEI8A2B09.17K09.3ANCC222&
R934001039 OD1509173DS000-VEI8A2B09.17K09.3DNCC222&
R934001051 OD1510171AS000-VEI8A2B09.17K10.1ANAC220&
R934001052 OD1510171CS000-VEI8A2B09.17K10.1CNAC220&
R934001061 OD1510211BS000-VEI8A2B12.21K10.1BNAC225&
R934001067 OD1510921CS000-VEI8A2B06.92K10.1CNAC225&
R934001071 OD151117370000 VEI8A2A09.17K11.37NCC218S
R934001072 OD1511173AS000-VEI8A2A09.U17K11.3ANCC22&
R934001073 OD1511173AS001-VEI8A2A09.V17K11.3ANCC22&
R934001075 OD1511173DS000-VEI8A2A09.U17K11.3DNCC22&
R934001090 OD1512171AS000-VEI8A2A09.U17K12.1ANAC22&
R934001100 OD1512211AS000-VEI8A2A12.U21K12.1ANAC22&
R934001101 OD1512211BS000-VEI8A2A12.U21K12.1BNAC22&
R934001102 OD1512211CS000-VEI8A2A12.U21K12.1CNAC22&
R934001113 OD1531173A0000 VEI8A2T09.17K31.3ANCC222S
R934001115 OD1531173AS001-VEI8A2T09.V17K31.3ANCC22&
R934001116 OD1531173AS800-VEI8A2T09.M17K31.3ANCC22&
R934001119 OD1531173BS000 VEI8A2T09.17K31.3BNCC222S
R934001120 OD1531173DS000-VEI8A2T09.17K31.3DNCC222&
R934001122 OD15311798OC00-VEI8A2T09.17K31.98NCAX18&
R934001125 OD1531183A0000-VEI8A2T06.18K31.3ANCC218S
R934001127 OD1531183AS001-VEI8A2T06.18K31-S8H/12DC
R934001129 OD1531183AS100-VEI8A2T06.18K31.3ANCC218&
R934001131 OD1531183BS000 VEI8A2T06.18K31.3BNCC218S
R934001142 OD15311898OC00-VEI8A2T06.18K31.98NCAX18&
R934001146 OD1531213A0000 VEI8A2T12.21K31.3ANCC225S
R934001150 OD1531213BS000 VEI8A2T12.21K31.3BNCC225S
R934001154 OD153121750000-VEI7A2T14.21K31.75NCL630&
R934001155 OD153121758000-VEI7A2T14.M21K31.75NCL63&
R934001156 OD15312198OC00-VEI8A2T12.21K31.98NCAX26&
R934001158 OD1531363A0000 VEI8A2T09.36K31.3ANCC222S
R934001168 OD1531753BS000 VEI8A2T12.75K31.3BNCC225S
R934001184 OD1532171A0000 VEI8A2T09.17K32.1ANAC220S
R934001186 OD1532171AS001-VEI8A2T09.V17K32.1ANAC22&
R934001189 OD1532171CS000-VEI8A2T09.17K32.1CNAC220&
R934001196 OD1532181A0000 VEI8A2T06.18K32.1ANAC218S
R934001199 OD1532181AS100-VEI8A2T06.18K32.1ANAC220&
R934001200 OD1532181B0000 VEI8A2T06.18K32.1BNAC218S
R934001204 OD15321896OC00-VEI8A2T06.18K32.96NAAX18S
R934001205 OD C VEI7A2A09S17K05.62NCL622&
R934001206 OD1506171DS2OC-VEI8A2A09.S17K06.1DNAC22&
R934001208 OD1506211DS2OC-VEI8A2A12.S21K06.1DNAC22&
R934001212 OD1532211A0000 VEI8A2T12.21K32.1ANAC225S
R934001219 OD15322196OC00 VEI8A2T12.21K32.96NAAX26S
R934001224 OD C-VEI7A2A12.M21K05.62NCC63&
R934001227 OD1506181DS2OC-VEI8A2A06S.18K06.1DNAC21&
R934001235 OD1532171DS2OC-VEI8A2T09.S17K32.1DNAC22&
R934003057 OD1502171AS002-VEI8A2A09.17K02.1ANAC220&
R934003063 OD1503183AS800-VEI8A2B.06M18K03.3ANCC21&
R934003080 OD1505183AS800 VEI8A2A06.M18K05.3ANCC21&
R934003082 OD1505183DS800-VEI8A2A06M18K05.3DNCC218&
R934003105 OD1506761AS000-VEI8A2A09.76K06.1ANAC220&
R934003110 OD1511193AS800-VEI8A2A06.U19K11.3ANCC21&
R934003111 OD1531173DS800-VEI8A2T09.M17K31.3DNCC22&
R934003114 OD1531183DS801-VEI8A2T06.M18K31.3DNCC21&
R934003122 OD153221540000-VEI7A2T14.21K32.54NAL630&
R934003423 OD15053698OC00-VEI8A2A09.36K05.98NCAX18&
R934003424 OD150617180 VEI8A2A09.17K06.18NAC218SEX3
R934003434 OD150518378000 VEI8A2A06M18K05.37NCC218S
R934003486 OD1507183MS000 VEI8I2A06.F18K07.3MNCC21&
R934003758 OD150521760000-VEI7A2A14.21K05.76NCL630&
R934003884 OD150518310000 VEI8I2A06.18K05.31NCC218&
R934003885 OD150618200000-VEI8I2A06.18K06.20NAC218&
R934004160 OD1511213DS000-VEI8A2A12.U21K11.3DNCC22&
R934004319 OD C-VESP-08A-12A/00-2A05-N7
R934004320 OD C-VESP-08A-12A/00-2A85-N7-&
R934004378 OD Z-VESP-08A-12A/00-2A05-N7
R934004411 OD1531363AS001-VEI8A2T09.V36K31.3ANCC22&
R934004493 OD1505893AS001-VEI8A2A12.V89K05.3ANCC22&
R934004542 OD1532181DS2OB-VESP-08A-12A/00-2T32-N7
R934004627 OD C-VESP-16G-16A/00-2A01-N7
R934004628 OD C-VESP-16G-16A/00-2A-N7
R934004630 OD B-VESP-16G-16A/00-2A05-N7
R934004674 OD C-VESP-12G-16A/00-2A05-N7
R934004675 OD B-VESP-12G-16A/00-2A05-N7
R934004749 OD C-VESP-12G-12A/00-2T31-N7
R934004812 OD C-VESP-08A-12A/00-2A05-N7
R934004878 OD1503363DS000-VEI8A2B09.36K03.3DNCC222&
R934004903 OD1532181DS2OC-VESP-08A-12A/00-2T32-N7
R934005046 OD1531173DS100-VEI8A2T09.17K31.3DNCC222&
R934005243 OD1506182DS2OC-VEI8A2A06S18K06.1DNAC218&
R978023991 OD150118320000 VEI8I2A06.18K01.32NCC218S
R978023992 OD150318370000 SZ8 NC 1-2 BI S8
R978023994 OD150418170000 SZ8 NO 1-2 BI S8
R978023996 OD150518310000 SZ8 NC 2-1 BI S8 LF
R978023997 OD150518320000 VEI8I2A06.18K05.32NCC218S
R978023999 OD150618180000 SZ8 NO 2-1 BI S8 MO
R978024000 OD150618200000 SZ8 NO 2-1 BI S8 LF
R978024003 OD153118250000 SZ8 NC 1+2 BI S8 LF
R978024004 OD153118470000 SZ8 NC 1+2 BI S8 MO
R978024007 OD153218190000 SZ8 NO 1+2 BI S8 MO
R978024011 OD150404170000 VEI8A2B16.04K04.17NAC218S
R978024012 OD150404180000 VEI-8A-2B-16-NA
R978024019 OD150521370000 VEI8A2A12.21K05.37NCC226S
R978024024 OD150621170000 VEI8A2A12.21K06.17NAC226S
R978034034 OD1531893AS0 VITON VEI-8A-2T
R987019976 TUBO D15 B. ACUM B.VALV.750KW RE-4-0
R987067733 OD1502211AS000-VEI8A2A12.21K02.1ANAC225&
R987125752 VEI-8A-2T-12-NC-S - OD 15-3121-3BS000
R987172056 VALVE OD1531213700 &
R987195006 VEI-8A-2T-06-NA-S OD15.32.18-17-00
R987198232 VALVE OD1532211AS0 &
R987201460 OD1532171CS0000 VEI-8A-2T-09-NA-S-NSS
R987231423 OD1531173BS0
R987231763 OD1531173AS001
R987233190 OD1505183AS000
R987256974 OD1503173BSO
R987269778 VALVE OD1531183AS000 &
R987280171 VALVE OD1506171AS000 &
R987321208 OD C
R987331918 OD15061818/OD02170130AC HMF
R987349614 VEI-EX OD15313698OC
R987361622 VALVE OD1506181CS200-S01
R987362042 SOLENOID-OPERATED OD1531823CS800
R987363900 SCREW-IN CAR.VALVE OD1506181AS000-S02
R987365139 SCREW-IN CAR.VALVE OD15061818/12VDC SPOL
R987365760 VALVE OD1505183AS000-S01 &
R987365972 SCREW-IN CAR.VALVE OD1505173AS0000
R987365973 SCREW-IN CAR.VALVE OD1505183780000
R987365974 SCREW-IN CAR.VALVE OD1505183IS0000
R987365975 SCREW-IN CAR.VALVE OD150518AS80000
R987365976 SCREW-IN CAR.VALVE OD150521378000
R987365977 SCREW-IN CAR.VALVE OD1505363ASO000
R987365978 SCREW-IN CAR.VALVE OD1506181ASO000
R987365979 SCREW-IN CAR.VALVE OD1506181IS0000
R987365980 SCREW-IN CAR.VALVE OD1506361AS0000
R987365981 SCREW-IN CAR.VALVE OD1506361ASO000
R987365982 SCREW-IN CAR.VALVE OD153118370000
R987365983 SCREW-IN CAR.VALVE OD1531183ASO000
R987365984 SCREW-IN CAR.VALVE OD1531753BS0000
R987365985 SCREW-IN CAR.VALVE OD1532181AS0000
R987365986 SCREW-IN CAR.VALVE OD1532181ASO000
R987365987 SCREW-IN CAR.VALVE OD1532211AS0000
R987366100 SPECIAL VALVE OD1506181AS0000
R987369760 VALVE OD1506171AS001-S01
R987386722 VALVE OD1531183DS801-S01
R987389264 VEI-8A-2T-10A-NC-S-NSS, N0 OD1531363AS00
R987391038 VEI8A2A09.17K06.17NAC218SXX3 OD15061717
R987391040 OD1504891BS0000 VEI-8A-2B-12A-NA-S-NSS,N
R987391041 OD1503893DS000 VEI-8A-2B-12A-NC-S-NSS, N
R988002282 OD1505183AS0000 VEI8A2A06.18K05.3AN -
力士樂REXROTH行走機械液壓-緊湊型液壓系統-插裝閥-機械插裝閥-螺紋插裝閥
R901208447 OD21010304-VSTXX09-17X03
R934001238 OD21010305-VSTXX12-21X03
R901109830 OD210103360000-VSTXX09-36X03
R901109366 OD21010356-VSTXX06-18X03
R988002556 OD21010356000 ST-C-06
R901109837 OD210103750000-VSTXX12-75X03
R901109832 OD210103890000-VSTXX12-89X03
R930072460 OD210103890V00-VSTXX12-89X03-V
R901088720 OD21010404-VSTXX09-17X04
R901128469 OD21010405-VSTXX12-21X04
R901109831 OD210104360000-VSTXX09-36X04
R901109367 OD21010456-VSTXX06-18X04
R901109838 OD210104750000-VSTXX12-75X04
R901109834 OD210104890000-VSTXX12-89X04
R930056068 OD21010556-VSTXX06CA.18X04
R934001254 OD210418030000-VSTUX06-18X03
R934001255 OD210418040000 VSTUX06CA.18X04
R934001256 OD210518030000-VSTUX03-18X03
R934001258 OD210618030000-VSTUX04-18X03
力士樂REXROTH行走機械液壓-緊湊型液壓系統-插裝閥-電磁插裝閥-電動比例閥-2 通雙重鎖定，常閉
R930077411 OD95061903AOB0-VEPN-08A-16/00-020-Q06-N&
R934001162 OD950689720000-VEPN-12A-16/25-070-Q6-N7
R901113761 OD953118030000-VEP5A2T06.18K31.03NAP910&
R901126864 OD953118040000-VEP5A2T06.18K31.04NAP910&
力士樂REXROTH行走機械液壓-緊湊型液壓系統-插裝閥-機械插裝閥-流量控制-2 通，壓力補償，全部可調-流量控制閥
R901106646 040202048520000-VRFB-10A-V-20
R930055368 04020204852000A-VRFB-10A-V-20
R901095981 040202048540000-VRFB-10A-V-40
R930055371 04020204854000A-VRFB-10A-V-40
R901106643 040202408520000-VRFB-10A-M-20
R930055372 04020240852000A-VRFB-10A-M-20
R930055373 04020240854000A-VRFB-10A-M-40
R930069707 04020240854001A-VRFB-10A-M-40-2BAR
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工程機械是裝備工業的重要組成部分。概括地說，凡土石方施工工程、路面建設與養護、流動式起重裝卸作業和各種建筑工程所需的綜合性機械化施工工程所必需的機械裝備，稱為工程機械。
它主要用于建設工程、交通運輸建設，能源工業建設和生產、礦山等原材料工業建設和生產、農林水利建設、工業與民用建筑、城市建設、環境保護等領域。
中國工程機械與其他各國比較還增加了鐵路線路工程機械、叉車與工業搬運車輛、裝修機械、電梯、風動工具等行業。
中國工程機械行業產品范圍主要從通用設備制造和專用設備制造業大類中分列出來。產品范圍涵蓋了工程機械大行業18大類產品，這18大類產品，包括挖掘機械，鏟土運輸機械，工程起重機械，工業車輛，壓實機械，樁工機械，混凝土機械，鋼筋及預應力機械，裝修機械，鑿巖機械，氣動工具，鐵路路線機械，工程機械，電梯與扶梯，工程機械專用零部件等。
普通重工工程機械
①挖掘機械 如單斗挖掘機（又可分為履帶式挖掘機和輪胎式挖掘機）、多斗挖掘機（又可分為輪斗式挖掘機和鏈斗式挖掘機）、多斗挖溝機（又可分輪斗式挖溝機和鏈斗式挖溝機）、滾動挖掘機、銑切挖掘機、隧洞掘進機（包括盾構機械）等。
②鏟土運輸機械 如推土機（又可分為輪胎式推土機和履帶式推土機）、鏟運機（又可分為履帶自行式鏟運機、輪胎自行式鏟運機和拖式鏟運機）、裝載機（又可分為輪胎式裝載機和履帶式裝載機、平地機（又可分為自行式平地機和拖式平地機）、運輸車（又可分為單軸運輸車和雙軸牽引運輸車）、平板車和自卸汽車等。
③起重機械 如塔式起重機、自行式起重機、桅桿起重機、抓斗起重機等。
④壓實機械 如輪胎壓路機、光面輪壓路機、單足式壓路機、振動壓路機、夯實機、搗固機等。
⑤樁工機械 如鉆孔機、柴油打樁機、振動打樁機、破碎錘等。
⑥鋼筋混凝土機械 如混凝土攪拌機、混凝土攪拌站、混凝土攪拌樓、混凝土輸送泵、混凝土攪拌輸送車、混凝土噴射機、混凝土振動器、鋼筋加工機械等。
⑦路面機械 如平整機、道碴清篩機等。
⑧鑿巖機械 如鑿巖臺車、風動鑿巖機、電動鑿巖機、內燃鑿巖機和潛孔鑿巖機等。
⑨其他工程機械 如架橋機、氣動工具（風動工具）等。
機械設備種類繁多。機械設備運行時，其一些部件甚至其本身可進行不同形式的機械運動。機械設備由驅動裝置、變速裝置、傳動裝置、工作裝置、制動裝置、防護裝置、潤滑系統、冷卻系統等部分組成。
機械行業的主要產品包括以下12類：
（1）農業機械：拖拉機、播種機、收割機械等。
（2）重型礦山機械：冶金機械、礦山機械、起重機械、裝卸機械、工礦車輛、水泥設備等。
（3）工程機械：鏟土運輸機械、壓實機械、混凝土機械等。
（4）石化通用機械：石油鉆采機械、煉油機械、化工機械、泵、風機、閥門、氣體壓縮機、制冷空調機械、造紙機械、印刷機械、塑料加工機械、制藥機械等。
（5）電工機械：發電機械、變壓器、、高低壓開關、電線電纜、蓄電池、電焊機、家用電器等。
（6）機床：金屬切削機床、鍛壓機械、鑄造機械、木工機械等。
（7）汽車：載貨汽車、公路客車、轎車、改裝汽車、摩托車等。
（8）儀器儀表：自動化儀表、電工儀器儀表、光學儀器、成分分析儀、汽車儀器儀表、電料裝備、電教設備、照相機等。
（9）基礎機械：軸承、液壓件、密封件、粉末冶金制品、標準緊固件、工業鏈條、齒輪、模具等。
（10）包裝機械：包裝機、裝箱機、輸送機等。
（11）環保機械：水污染防治設備、大氣污染防治設備、固體廢物處理設備等。
（12）礦山機械
工程機械的分類
（1）挖掘機械、（2）鏟土運輸機械、（3）工程起重機械、（4）工業車輛、（5）壓實機械、（6）路面機械、（7）樁工機械、（8）混凝土機械、（9）鋼筋和預應力機械、（10）裝修機械、（11）鑿巖機械、（12）氣動工具、（13）鐵路線路機械、（14）掘進機械、（15）市政工程與環衛機械、（16）工程機械、（17）電梯與扶梯、（18）工程機械專用零部件、（19）其它專用工程機械
液壓系統的維護
1、選擇適合的液壓油
液壓油在液壓油系統中起著傳遞壓力、潤滑、冷卻、密封的作用，液壓油選擇不恰當是液壓系統早期故障和耐久性下降的主要原因。應按隨機《使用說明書》中規定的牌號選擇液壓油，特殊情況需要使用代用油時，應力求其性能與原牌號性能相同。不同牌號的液壓油不能混合使用，以防液壓油產生化學反應、性能發生變化。深褐色、乳白色、有異味的液壓油是變質油，不能使用。
2、定期保養注意事項
目前有的工程機械液壓系統設置了智能裝置，該裝置對液壓系統某些隱患有警示功能，但其監測范圍和準確程度有一定的局限性，所以液壓系統的檢查保養應將智能裝置監測結果與定期檢查保養相結合。
3、防止固體雜質混入液壓系統
清潔的液壓油是液壓系統的生命。液壓系統中有許多精密偶件，有的設阻尼小孔或縫隙等。若固體雜質入侵將造成精密偶件拉傷，發卡、油道堵塞等，危及液壓系統的安全運行。一般固體物質入侵途徑有：液壓油不潔；加油工具不潔；加油和維修、保養不慎；液壓元件脫屑等。
防止空氣和水入侵液壓系統
4.防止空氣入侵液壓系統
在常壓常溫下液壓油中含有容積比為6%~8%的空氣，壓力降低時空氣會從油中游離出來，氣泡破裂使液壓元件“氣蝕”，產生噪聲。大量的空氣進入油液中將使“氣蝕”現象加劇，液壓油壓縮性增大，工作不穩定，降低工作效率，執行元件出現“爬行”等不良后果。另外，空氣還會使液壓油氧化，加速其變質。
防止水入侵液壓系統
液壓油中含有過量水分會使液壓元件銹蝕，油液乳化變質、潤滑油膜強度降低，加速機械磨損。除了維修保養時要防止水分入侵外，還要注意儲油桶不用時要擰緊蓋子，*好倒置放置；含水量大的液壓油要經多次過濾，每過濾一次要更換一次烘干的濾紙。在沒有專用儀器檢測時，可將液壓油滴到燒熱的鐵板上，沒有蒸氣冒出并立即燃燒方能加注。
5.工程機械作業要柔和平順
工程機械作業應避免粗暴，否則必然產生沖擊負荷，使工程機械故障頻發，大大縮短其使用壽命。作業時產生的沖擊負荷，一方面會使工程機械結構早期磨損、斷裂、破碎，另一方面又使液壓系統中產生沖擊壓力，沖擊壓力又會使液壓元件損壞、油封和高壓油管接頭與膠管的壓合處過早失效漏油或爆管、溢流閥頻繁動作使油溫上升。我單位新購一臺UH171正鏟挖掘機，作業中每隔4~6天斗門油管就要漏油或爆裂。油管是隨機進口的純正品，經檢測沒有質量問題。通過現場觀察，發現是斗門開、閉時強烈撞擊限位塊、門框所致。要有效地避免產生沖擊負荷：必須嚴格執行操作規程；液壓閥開、閉不能過猛、過快；避免使工作裝置構件運動到極限位置產生強烈擊；沒有沖擊功能的液壓設備不能用工作裝置（如挖掘機的鏟斗）猛烈沖擊作業對象以達到破碎的目的。還有一個值得注意的問題：操作手要保持穩定。因為每臺設備操縱系統的自由間隙都有一定差異，連接部位的磨損程度不同其間隙也不同，發動機及液壓系統出力的大小也不盡相同，這些因素賦予了設備個性，只有使用該設備的操作手認真摸索，修正自己的操縱動作以適應設備的個性，經過長期作業后才能養成符合設備個性的良好操作習慣。工程機械行業堅持定人定機制度，這也是因素之一。
