Rau cov tuam txhab koom nrog kev tsim kho tshuab, cov txheej txheem kev tsim kho tshuab yog qhov ncaj qha txiav txim siab seb cov haujlwm li cas tuaj yeem tswj tau. Rau cov tshuab siv hydraulic kis tau tus mob, kev ua haujlwm zoo ntawm hydraulic system yog ib qho tseem ceeb qhia txog nws txoj kev noj qab haus huv tag nrho. High-cov kua dej zoo hydraulic ua kom ntseeg tau tias kev ua haujlwm ntawm hydraulic system, thaum kev saib xyuas kom zoo yog qhov tseem ceeb rau qhov kev ntseeg tau.
Hydraulic kua ua hauj lwm rau kis siab thiab muab lubrication, txias, thiab sealing nyob rau hauv lub system; Kev xaiv cov kua dej tsis raug yog thawj qhov ua rau ua tsis tiav ntxov thiab txo cov kav ntev. Cov kua dej hydraulic yuav tsum raug xaiv raws li cov lus qhia tshwj xeeb hauv cov khoom siv phau ntawv ua haujlwm. Yog tias cov kua dej hloov pauv yuav tsum tau siv vim muaj qhov xwm txheej tshwj xeeb, nws yuav tsum ua kom haum cov yam ntxwv ua haujlwm ntawm cov kua dej qub qub kom ze li sai tau. Ntau hom lossis qib ntawm cov kua dej hydraulic yuav tsum tsis txhob sib xyaw, vim qhov no tuaj yeem ua rau muaj tshuaj lom neeg thiab hloov cov kua dej. Hydraulic kua uas yog xim av tsaus, mis nyuj dawb, los yog muaj ntxhiab tsw txawv txawv qhia tias deterioration thiab yuav tsum tsis txhob siv.
