一面坡机务段从1991年末已由蒸汽牵引过渡到东风4型内燃机车牵引．当时投入正常运用的八自机车曾相继发生过柴油机滑油压力保护装置（UK）不断发生频修的现象，虽然检修更换，但仍不起保护作用．由于当时机车运用比较紧张，在无法修复的情况下，又不能影响正常运输．只好使滑油 A slope locomotive depot from the end of 1991 by the steam traction transition to the Dongfeng 4 locomotive traction. At that time, the eight-wheeled locomotive put into normal operation had successively undergone diesel engine oil pressure protection device (UK) frequent frequency repair phenomenon, although the maintenance replacement, but still can not afford to protect. Due to the relatively tight locomotive operation at that time, it was impossible to affect normal transport without being repaired. Had to make oil