Ejection is carried out when the ejector strikes the buffer head, sending a push forward through the ejector bar, which hits the ejector pin.
2.
Other detail fittings included vacuum brakes and oval buffers, to avoid locking of buffer heads when working around tight curves with the engine's long overhang at each end.
3.
Also as the standard US design did not have buffers fitted, the BHP locos were fitted with buffers with oversized buffer heads, necessary for the tight curves and BHP s own internal rolling stock.
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