Txoj kev txij nkawm yog qhov txuas tseem ceeb hauv kev ua kom muaj kev nyab xeeb thiab ua haujlwm tau zoo ntawm kev thauj mus los ntawm kev tsheb nqaj hlau. Hauv kev saib xyuas ntawm cov chaw hluav taws xob hluav taws xob, kev ua haujlwm txij nkawm tau muaj lub ntsiab cai ua haujlwm.
Rau kev kho cov chaw locomotive, muaj ntau cov txheej txheem kho. Machining yog ib qho kev siv ntau, nyob rau hauv ib feem twg ntawm cov khoom ntawm cov chaw ua haujlwm raug tshem tawm los ntawm lub tshuab ua haujlwm ntawm qhov chaw ua haujlwm ntawm qhov yuav tsum tau ua. Piv txwv li, kho cov khoom nrog cov qhov khawb ib nrab yog li Axles thiab traction lub cev muaj zog cov neeg tsav tsheb. Qhov zoo dua ntawm txoj kev no yog tias nws tuaj yeem txuas ntxiv cov kev pabcuam lub neej ntawm cov kev pab cuam uas muaj nqis, tab sis nws yuav nce ntau ntawm cov khoom seem thiab cov khoom siv sib txawv.
Vuam kho kuj yog lub luag haujlwm tseem ceeb hauv kev saib xyuas ntawm cov hluav taws xob hluav taws xob. Cov uas muaj cov neeg sib koom ua ke yog Brazing thiab fusion vuam, uas tau muab faib ua hluav taws xob vuam thiab roj vuam raws li cov qauv cua kub. Brazing siv cov cam nrog qis dua melting taw tes tshaj li cov hlau hauv paus, thiab ua kom sib txawv ntawm kev sib txuas tom qab muab cov cua sov ua kom muaj kev sib txuas. Mos soldering siv harder nrog lub poelting nrog lub ntsiab lus melting hauv qab 325 degree, uas tuaj yeem kho qee cov txheej txheem, ruaj khov thiab hnav thiab kua muag tsis ua haujlwm.
Lub xov tooj locomotive txij puag ncig thiab kev kho cov txheej txheem yog txiav txim siab raws cov qauv txheej txheem ntawm cov locomotive. Cov txheej txheem kev tu xyuas tau muab faib ua plaub qib: kev saib xyuas loj, kev saib xyuas nruab nrab, txij nkawm me thiab kev saib xyuas me me. Cov txheej txheem sib txawv sib txawv muaj cov kev tsom iav sib txawv. Piv txwv li, kev saib xyuas me feem ntau yog kev soj ntsuam thiab kev kho ntawm cov cim nres, thiab lwm yam cim thiab qhov chaw cia yuav tsum tau ua thaum lub sijhawm rho tawm.
Ntxiv rau cov hluav taws xob hluav taws xob, lwm cov ciav hlau xws li cov khoom siv roj diesel kuj yuav tsum tau tshuaj xyuas thiab kho cov haujlwm ntawm cov khoom siv tau ua haujlwm tau yooj yim ntawm cov locomotive yuav ua kom tiav.
