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检修YT－220型推土机时发现油缸横梁衬套研碎脱落，转轴与横梁孔磨损严重，需更换横梁总成。但由于缺乏备件，逐决定修复使用。具体步骤如下：（1）将横梁沿制时的焊缝切割分解，以便进行机械加工；（2）将装大衬套处镗孔，由原尺寸130mm镗至136＋：”；装小衬套处由80镗至86；
Overhaul YT-220 bulldozers found cylinder cross-beam bushing off, shaft and cross-beam hole wear serious need to replace the beam assembly. However, due to lack of spare parts, decided to repair the use of each. The specific steps are as follows: (1) Cutting and splitting the weld of the beam along the system for machining; (2) Boring the large bushing at the place of bored 136mm: Boring from 80 to 86;