Some of the places, are interrupted, or incomplete sentences.
...the chains of the lube will be flung around...
Here is such an interruption. Its actually not "the chains of the lube". He terminates thought/sentence at "chains of", and continues on into "the lube...". So its not a real sentence construction. Should indicate pause/gap a break in the sentence. There are a few other verbal glitches, but basically, your version catches his drift. "I'm a mechanic here at (ahh or the, he is definitely pausing) M..."