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)自動(dòng)下降泄壓。故障現象很清晰，所以工程師根據機主的描述先分析能夠引發(fā)該故障的幾個(gè)原因：</div><div>　　</div><div>　　1、鏟斗的二次先導壓力低；鏟斗二次壓力是先導操縱閥到主閥之間的先導壓力，當先導操縱閥芯磨損，卡頓，會(huì )造成二次先導壓力低。</div><div>　　</div><div>　　2、鏟斗閥芯卡頓，磨損；鏟斗主閥和閥芯之間出現磨損會(huì )使得壓力油內泄，使得主壓力降低?？D在半開(kāi)位置會(huì )使得壓力油流量減少，使得動(dòng)作慢。</div><div>　　</div><div>　　3、鏟斗過(guò)載閥故障；鏟斗過(guò)載閥閥體和閥芯磨損，使得過(guò)載閥保持不住主壓力，會(huì )從磨損部位泄掉，過(guò)載閥的密封圈破損其道理和上面一樣。</div><div>　　</div><div>　　4、鏟斗油缸內泄；鏟斗油缸里面的活塞油封破損，或鏟斗油缸內壁有拉傷，使得油缸大腔和小腔串油，導致內泄。</div><div>　　</div><div>　　allu斗是挖掘機直接與外在環(huán)境、工作對象接觸的，所以它的疲勞程度和工作強度都非常大，當遇到較堅硬的物體時(shí)不要用暴力操縱，以免損壞油缸。</div> </div> <div id="meo0auy" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-940032.html">篩分鏟斗可以處理哪些污染土質(zhì)，如何處理</a></li> <li>下一篇：<a href="/Article-937736.html">正確使用篩分鏟斗的重要性，你做到了嗎？</a></li> </ul> </div> </div>   <div id="mm2qs2y" class="ly_foot"> <div id="em222y0" class="lyFoot_main"> <div id="ek2moie" class="lyFoot_con"> <div id="kcie2u0" class="lyFoot_TelNav"> <div id="0gkoqmy" class="lyFoot_Tel"> <img 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