"An employee was endeavouring to load a Caterpillar 120M
grader onto a low loader float for transportation to a work
site, During this operation as was common practice with the
larger grader the operator attempted to drive the graders front
wheels up onto float gooseneck platform to enable securing of
the loader ramps. After the first attempt to drive the front
wheels onto the gooseneck failed and at this point believing he
required more drive engaged the diff lock and attempted a second
time to drive the front wheels up onto the goose neck. With all
rear wheels of the grader now engaged and driving they lost
traction on the wet steel loader deck thus causing the rear of
the grader to move towards the left or downhill side and off the
loader. The sudden weight shift and wet surface causing the
tandem casing to scrape across the edge of the float deck until
the grader reached such a point of no return that it eventually
toppled of the side of the float and came to rest on its left
hand side"
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