every time I have seen that steel pipe crack, it is caused by a broken muffler and or muffler bracket. When the muffler bracket breaks, there is enough vibration to eventually cracke that line. When the reel drive system is set to the auto mode and first engaged, it will be looking for a signal from the transmission speed sensor before the reel will properly react. This may be where the delay is partially coming from. As mentioned, it is quite common. Does the reel speed become erratic during normal operationIJ Do you have a chaff spreader hooked up in the reel drive hyd. systemIJ